Content-type: text/html Man page of NSR_DEVICE

NSR_DEVICE

Section: File Formats (5)
Updated: Dec 11, 08
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NAME

nsr_device - NetWorker resource type "NSR device"  

SYNOPSIS

type: NSR device  

DESCRIPTION

Each storage device used by a NetWorker server is described by a single resource of type NSR device. See nsr_resource(5) for information on NetWorker resources. To edit the NSR device resources run:
nsradmin -c "type:NSR device"

Be sure to include quotation marks and to insert a space between "NSR" and "device". See nsradmin(8) for information on using the NetWorker administration program. The mounting and unmounting of individual volumes (tapes or disks) is performed using the nsrmm(8), and nsrjb(8), commands and NetWorker Management Console.  

ATTRIBUTES

The following attributes are defined for resource type NSR device. The information in parentheses describes how the attribute values are accessed. Read-only indicates that the value cannot be changed by an administrator. Read/write indicates a value that can be set as well as read. Hidden indicates a hidden attribute of interest only to programs or experts. These attributes can only be seen when the hidden option is turned on in nsradmin(8). Static attributes change values rarely, if ever. Dynamic attributes have values that change rapidly. For example, an attribute marked (read-only, static) has a value that is set when the attribute is created and never changes.

name         (read-only, static)
This attribute specifies the path name of the device.
Only non-rewinding tape devices are supported. For systems that support "Berkeley style" tape positioning, use the BSD tape device name. The name given to Optical disks is typically the name given to the "c" partition of the raw device.

A logical device type has been defined to facilitate interaction with external media management services. When interacting with external media management services, the device name may be determined by the media management service associated with the device where a volume is loaded. The logical device is used to define a NetWorker device resource. The number of device resources that can exist is limited by the number of volumes managed by the service that NetWorker may access simultaneously. The name given to a logical device is not related to any specific device, but is required to be a unique name for the device. For logical devices, both the media type and the family are set to logical. The name, type, and family are determined after the media management service has loaded a volume into a device in response to a request made by NetWorker. The name, type, and family of the actual device are then stored in the attributes logical name, logical type, and logical family, respectively. The association between the logical device and the actual device only exists when the volume is loaded into the device and allocated for use by NetWorker.

Specify UNC (\\<server-name>\<share-point-name>) path when creating an adv_file device of a network filesystem on Windows storage node.

When defining a remote device on a storage node, include the prefix "rd=hostname:", in the path name; where hostname is the system to which the device is directly attached (the storage node). For more information, see nsr_storage_node(5).

Example: name: /dev/rmt/0hbn;
comment              (read/write)
This attribute is provided for the administrator to keep any explanatory
remarks or supplementary information about the device.
description         (read/write)
This attribute is used to store a brief description about the device. The
description is used to help administrators identify the device, and it can be in any format.

Example: description: DLT8000 tape drive in Engineering Lab rack #2;
message      (read-only, dynamic, hidden)
This attribute specifies the last message received
from the NetWorker server regarding this device. The values for this attribute may include information on the progress or rate of the operation.
Example: message: "Tape full, mount volume mars.017 on /dev/nrst8";
volume name  (read-only, dynamic, hidden)
This attribute monitors the mounting and unmounting of
volumes for a device. When a volume is mounted, the value is the volume name, otherwise there is no value.
Example: volume name: mars.017;
media family (read-only, static, hidden)
This attribute describes the class of storage media, as determined from the
media type. The only legal values are: tape - tape storage device; disk - disk storage device; logical - used when interacting with an external media management service.
Example: media family: tape;
media type   (read-only, static)
This attribute indicates the type of media a device uses.
The media type varies depending on the operating system/platform (See the online NetWorker Hardware Compatibility Guide, which is referenced in the NetWorker Administration Guide in the Device and Media Management chapter, for a comprehensive list of media types supported on your platform.). Potential values, their meaning, and default capacities are:
4mm - 4mm digital audio tape (1 GB); 8mm - 8mm video tape (2 GB); 8mm 5GB - 8mm video tape (5 GB); adv_file - advanced file type device, standard UNIX file system is supported; dlt - digital linear tape cartridge (10 GB); vhs - VHS data grade video tape (14 GB); 3480 - high-speed cartridge tape (200 MB); qic - quarter inch data cartridge (150 MB); himt - half inch magnetic tape (100 MB); tk50 - DEC TK50 cartridge tape (94 MB); tk70 - DEC TK70 cartridge tape (296 MB); optical - optical disks, Write Once Read Many (WORM), Erasable Optical Disks (EOD), or standard UNIX files are supported; file - file type device, standard UNIX file system is supported; logical - used when interacting with an external media management service.
Example: media type: 8mm 5GB;
enabled      (read-write)
This attribute indicates whether a device is available for use.
The value for this attribute is either Yes, No or Service. If the value is set to Yes the device is fully operational and can be used for all operations. This is the default setting for a device. If the value is set to No, the device is disabled and may not be used. A device cannot be set to No if a device is mounted, since it would cause the mounted volume to become inaccessible to NetWorker until the device is set back to Yes. If the value is set to Service, the device may not be mounted for save or recover operations. This state is used to reserve a device for maintenance. The device can be used for administrative purposes such as volume verification, labeling or inventories if the device is selected using the -f option. A device set in Service mode can not be used for save or recover operations. If the device is set to Service while the device is in use, all current sessions will be allowed to complete normally, but no new sessions will be assigned to the device. If the device is a jukebox device, the device will be unloaded after the sessions have completed.
Example: enabled: yes;
shared devices       (read-write, hidden)
This attribute enables, disables or service modes all devices that have the
same value for their hardware id attribute, and so are sharing the same physical drive. Possible values are enable all, disable all, service all or done. After the value is set to either enable all, disable all or service all and the action is performed, the value will be reset to done. The action will enable, disable or service mode as many devices as it can, regardless of any error conditions. For example, it is not possible to disable a device that has a mounted volume. So when this attribute is set to disable all, as many devices as possible will be disabled, excluding those with mounted volumes. For such cases, an error message will be logged.
Example: shared devices: done;
write enabled        (read/write, dynamic, hidden)
This attribute indicates whether writing to the current volume is allowed.
The value for this attribute may be set to yes or no. This value can only be set when a volume is not mounted.
Example: write enabled: no;
read only    (read-write)
This attribute indicates whether a device is reserved for read-only
operations, such as recover or retrieve. The value for this attribute can be either yes or no. If the value is set to yes, only read operations are permitted on the device. This value cannot be changed if a volume is mounted.
Example: read only: yes;
target sessions                      (read/write)
This attribute indicates the target number of sessions that will write
to a device. When all devices on a host have the same value for this attribute, sessions are assigned to a device, until the device's target sessions is reached; then sessions are assigned to the next device on the host. Once all devices have reached their target sessions, new sessions are assigned equally across all devices.
When this attribute has different values for devices on a host, and the nsrmmd(8) has not yet been assigned to a device, then sessions are assigned to an nsrmmd(8) based on the lowest attribute value among the host's devices. Once the nsrmmd(8) is assigned to a device, the target sessions value for the assigned device is used.
Use higher values to multiplex more clients onto each tape. This attribute is not a maximum number for a device, but is used for load-balancing.
Example: target sessions: 3;
volume label (read/write, dynamic, hidden)
This attribute is set by the
Verify label operation and can be performed before the Label operation. If this attribute is blank during the labeling process, then the volume's current label is reused.
volume default capacity      (read/write, static, hidden)
This attribute is used by the
Label operation when the volume current capacity attribute is blank. To override the volume default capacity associated with the media type, you must enter a specific value, such as 1 or greater. The value of this attribute must end with K, M, or G, where K represents kilobytes, M represents megabytes, and G represents gigabytes. The actual capacity written to the volume may be slightly lesser or greater than the value specified.

This hidden attribute can be modified by a user, and can be used to override default sizes when using devices (and/or tapes) with different capacities than the defaults.

Example: To override the default capacity of a tape drive to 10 Gb for all future volume label operations, set the value as follows:
volume default capacity: 10G;
volume current capacity     (read/write, dynamic, hidden)
If the attribute's value is non-blank, it determines the
capacity of a volume during the Label operation. Its format is the same as volume default capacity.
Example: volume current capacity: 5G;
volume expiration    (read/write, dynamic, hidden)
This attribute is set by the
Verify label operation and can also be used by the Label operation. The value for this attribute is specified in nsr_getdate(3) format. A blank value causes the default expiration to be used during labeling.
Example: volume expiration: next year;
volume pool  (read/write, hidden)
This attribute indicates the pool that a mounted
volume belongs to. This attribute can be set right after a device has been created and prior to a volume has been labeled to specify or display the default pool selection for the Label operation. If this attribute is set during a Label or Label without mount operation, this value will indicate the pool a volume is being assigned to. In order to change the volume pool assignment, Label operation must be performed by specifying a different pool. Manual updates to this attribute in Devices resource has no effect on the pool assignment. See nsr_pool(5) for more information on volume pools.
Example: volume pool: myPool;
volume flags (read/write, hidden)
This attribute displays the new flags for the volume being operated on.
This attribute is used during "Label" or "Label without mount" operations.
volume operation     (read/write, dynamic, hidden)
The
volume operation attribute manipulates the media (volume) currently located inside the device. This attribute can be set to one of the following values: Unmount, Mount, Verify label, Verify write time, Label, Label without mount, Eject, or Monitor device. Each of these operations may require parameters to be set.

When the value is Unmount, NetWorker releases the device. The Unmount operation is asynchronous.

When the value is Mount, NetWorker mounts the loaded volume into the device. The Mount operation is asynchronous.

When the value is Verify label, the volume's label is read by NetWorker, and the volume label and volume expiration attributes are set. The Verify label operation is synchronous, and therefore the operation may take a long time to complete.

When the value is Verify write time, the volume's label is read by NetWorker, and the attributes volume label, volume expiration, and volume write time are set. The Verify write time operation is synchronous, and therefore the operation may take a long time to complete.

When the value is Label or Label without mount, the volume receives a new label as determined by the attributes below. When the value is Label, the volume is then mounted. These operations are asynchronous.

When the value is Eject, NetWorker ejects the volume from the device. The Eject operation is asynchronous.

When the value is Monitor device and the device is idle (no volume loaded into the device), NetWorker will periodically check the device to determine whether a volume has been loaded into the device. When a volume containing a readable NetWorker label is loaded, the volume is placed into the NetWorker media database. The volume can then be written to by NetWorker if the volume is mounted with write permissions turned on; otherwise, the volume is mounted as read-only, and cannot be written to by NetWorker. When a volume without a readable NetWorker label is loaded into the device, the device's unlabeled volume loaded attribute is set to yes, and the volume may be labeled at a later date. The Monitor device operation is never performed on jukebox devices, because NetWorker only monitors non-jukebox devices.
volume write time    (read-only, dynamic, hidden)
This attribute indicates the time that a save set was first written to the volume.
volume error number  (read-only, dynamic, hidden)
This attribute indicates the last error number reported for this device. This is a numeric value encoded with the source, severity and the actual error number. Processes check for this value only on error in a media operation when the media operation is known to update this field, e.g., a label verify. The error number is not reset on a successful media operation, so it is not an indication of the status of the last media operation, but just the last error number reported for this device.
volume block size    (read-only, dynamic, hidden)
This attribute indicates the block size of the currently mounted volume.
volume id    (read-only, dynamic, hidden)
This attribute indicates the volume id for the currently mounted volume.
long volume id       (read-only, dynamic, hidden)
This attribute indicates the volume id for the currently mounted volume in
the long globally unique format.
accesses     (read-only, hidden)
This attribute indicates the total number of operations performed on the
device since it was configured as a NetWorker device. Changes to this attribute are propagated to all devices that have the same hardware id value.
access weight        (read/write, hidden)
This attribute indicates the weight of a single operation performed on the
device. The "accesses" attribute will be incremented by "access weight" each time an operation is performed on the device. The higher the weight, the less often the device will be selected for new operations. Changes to this attribute are propagated to all devices that have the same hardware id value.
consecutive errors   (read-only, dynamic, hidden)
This attribute indicates the current number of consecutive errors on a device.
Changes to this attribute are propagated to all devices that have the same hardware id value.
max consecutive errors       (read/write, hidden)
This attribute indicates the maximum number of consecutive errors allowed
before disabling the device. Changes to this attribute are propagated to all devices that have the same hardware id value.
operation arg        (read-only, dynamic, hidden)
This attribute indicates extra parameters to be used during device operations.
Parameters are packed into a string and parsed by the associated operation's function.
volume message       (read-only, dynamic, hidden)
This attribute indicates the result of the last volume operation.
event tag    (read/write, single number, hidden)
This attribute contains the tag (unique identifier) of the last
notification event sent to the nsrd (8) daemon. The tag is used to clear the previous event. This attribute is used to pass information between NetWorker programs, and should not be changed manually by the administrator.
NSR operation        (read-only, dynamic, hidden)
This attribute indicates the current operation being performed by a device.
The valid values for this attribute are: Idle, Write, Read, Eject, Verify label, or Label.

Example: NSR operation: Write;
minor mode   (read-only, dynamic, hidden)
This attribute indicates the current state of a device. The
NSR operation attribute is the major mode. The valid values for this attribute are: idle, reading, writing, rewinding, moving forward, moving backward, error, done, writing eof, or finding eom.

Example: minor mode: moving forward;
jukebox device       (read/write, dynamic, hidden)
This attribute indicates the media device that is part of a jukebox device.
This value can be either yes or no.
statistics   (read-only, dynamic, hidden)
This attribute reports the statistics for the operation of this device.
The statistics include:
the time of operation ("elapsed"), the number of errors ("errors"), the last writing rate ("last rate"), the maximum number of concurrent clients ("max clients"), the number of file marks written ("file marks"), the number of rewinds ("rewinds"), the number of files skipped ("files skipped"), the number of records skipped ("records skipped"), the current file number ("current file"), the current record number ("current record"), the relative number of files being spaced over ("seek files"), the relative number of records being spaced over ("seek records"), the total estimated amount read/written on the volume, in KB ("estimated KB", to be implemented in a future release), the total amount read/written on the volume, in KB ("amount KB"), the current amount read/written on this file, in KB ("file amount KB"), and the current number of sessions assigned to this device ("sessions").
cleaning required    (read/write)
This attribute indicates whether a device needs to cleaned. The value for
this attribute may be either yes or no. If the value of this attribute changes from yes to no and the value of date last cleaned attribute is not updated, then the date last cleaned attribute is set to the current time. NetWorker might set this attribute to yes if, at the time the device is next scheduled to be cleaned, it is not available to be cleaned. In this case, the following message is displayed: device cleaning required. This message indicates that the device needs to be cleaned. This attribute can only be used for a device whose media family is tape and jukebox device is yes. For all other devices, the value of this attribute is always no.
cleaning interval    (read/write)
This attribute indicates the amount of time from the
date last cleaned until the next scheduled cleaning for the device. This value can be specified in days, weeks, or months. One day, week, or month is implied if a number is not specified. If this attribute is set and date last cleaned is blank, date last cleaned is set to the current time. This attribute may only be used for a device whose media family is tape and jukebox device is yes.

Example: cleaning interval: 2 weeks;
date last cleaned    (read/write)
This attribute indicates the time and day a device was last cleaned.
Input may be in any format acceptable to nsr_getdate(3). Some values acceptable to nsr_getdate(3) are relative, for example, now. For that reason all input is converted into ctime(3) format, weekday, month, day, time, year. As noted in the description of cleaning required and cleaning interval, the value of this attribute might be set automatically by NetWorker. This attribute can only be used for a device whose media family is tape
auto media management        (read-write)
This attribute indicates whether "automated media management" is enabled for
a device. For jukebox devices this value is always no. See nsr_jukebox(5) for a description of auto media management for a jukebox. For non-jukebox devices, this value can be either yes or no. If this value is set to yes, then any recyclable volumes loaded into the device might be automatically re-labeled by NetWorker for re-use, and unlabeled volumes loaded into the device can be automatically labeled. When NetWorker is labeling a volume that is not expected to have a valid NetWorker label, it verifies that the volume is unlabeled before labeling the volume. A volume is considered to be unlabeled if the volume does not contain a label that may be read by this device.

Note: If a volume contains a label, but the label is written at a density that cannot be read by the associated device, the volume is considered to be unlabeled. If the volume contains data written by an application other than NetWorker, it most likely does not have a label recognizable by NetWorker, and the volume is considered to be unlabeled. With this attribute enabled, care should be taken when loading any volume considered to be unlabeled or recyclable into the device. The volume might be re-labeled and the data previously on the volume over-written by NetWorker.

When this attribute is set to yes for a device, and the device is idle (no tape loaded into the device), NetWorker will monitor the device and wait for a volume to be loaded. See the description of Monitor device in the discussion of the volume operation attribute.

Example: auto media management: yes;
NDMP (read-only)
This attribute is used to note which devices are associated with
NDMP servers. This attribute cannot be changed after the resource has been created. The resource must be deleted and recreated if the user needs to change this attribute for this device. The same username (remote user attribute) and password should be configured in the device resource as they are configured for the NDMP server.
Example: NDMP: yes;
max active devices   (read-write)
This attribute set the maximum number of devices NetWorker may use
from the storage node associated with the device. All devices on a storage node must have the same value for this attribute. When this attribute is modified, the new value is propagated to all other devices on the storage node. The default value for this attribute is NULL = no limit on the number of active devices on the storage node. For newly created devices the value of this attibute is inherited from other devices on the same storage node or set to the default value of NULL if there are no other devices on the storage node. Value for this attribute must be an integer greater than the number of non-shared devices on the storage. This attribue can only be set on storage nodes with shared devices.
dedicated storage node       (read-write)
The value for this attribute can be either yes or no.
The value of this attribute determines whether a storage node is a dedicated storage node. A dedicated storage node can only back up its local data. All devices on a storage node must have the same value for this attribute. When a device is created or the value of this attribute is modified, the value of this attribute is propagated to all other devices on the storage node.
Example: dedicated storage node: yes;
remote user          (read/write, string)
This attribute is used when the NDMP attribute is set to a value
of yes. The value entered for this attribute should be the username configured for the NDMP server. This attribute is also used when creating an adv_file device of a network drive on Windows storage node. Specify remote user attribute as the user name for the Windows storage node (nsrmmd) to connect to the network drive.
Example: remote user: root;
password     (read/write, encrypted)
This attribute is used in conjunction with the
remote user attribute to configure access to a NDMP server. This attribute is also used in conjunction with the remote user attribute to connect to an adv_file device of a network drive on Windows storage node.
Example: password: ;
unlabeled volume loaded      (read-only, dynamic, hidden)
This attribute indicates whether a volume loaded into the device has
a readable NetWorker volume label. This value can be either yes or no. This attribute is set to yes when NetWorker is monitoring the device, a volume is loaded into the device, and the volume does not have a valid NetWorker label that can be read by this device. This attribute is set to no when the volume in the device is labeled or ejected from the device.
logical name (read-only, hidden, no create)
This attribute indicates the name of the actual device
associated with the logical device. This attribute is only used for logical devices.

Example: logical name: /dev/rmt/0hbn;
logical family       (read-only, hidden, no create)
This attribute indicates the family of the actual device
currently associated with the logical device. The values that can be associated with this attribute are the values that are valid for the media family attribute. The only exception is that the value of this attribute cannot be set to logical. This attribute is only used for logical devices.

Example: logical family: tape;
logical type (read-only, hidden, no create)
This attribute indicates the actual device type associated with the logical device.
The values that can be associated with this attribute are the values that are valid for the media type attribute. The only exception is that the value of this attribute cannot be set to logical. This attribute is only used for logical devices.

Example: logical type: 8mm 5GB;
hardware id  (read/write)
This attribute represents the unique identification of a shared physical
drive, which can be accessed by multiple device resources. Each device resource that shares the same physical drive must have the same value for this attribute. It can only be updated when the device is disabled and not within a jukebox resource. When a value is defined for this attribute, corresponding device messages will contain a number that uniquely represents the hardware id attribute, and will be visible in administrator commands, such as NetWorker Management Console and nsrwatch(8). This number identifies the devices that share the same physical drive.
save mount timeout   (read/write, hidden, no create)
This attribute indicates the timeout value for an initial save mount
request for the storage node on which a device is located. If the request is not satisfied within the indicated time, the storage node will be locked from receiving save processes for the "save lockout" time. See nsr_storage_node(5) for a description of storage nodes. This attribute can be used for local devices as well, but "save lockout" cannot be changed from its default value of zero. Hence, local devices cannot be locked out from save requests.
save lockout (read/write, hidden, no create)
This attribute indicates the number of minutes a storage node will be
locked from receiving save assignments after it reaches the save mount timeout time during a save mount request. A value of zero indicates that the node will not be locked. This attribute cannot be changed for local devices.
CDI  (read-write, no create)
This attribute indicates whether CDI (Common Device Interface) is
used to communicate with this device and if so, which CDI method is used. The value for this attribute is one of:
Not used
NetWorker will use the same method to communicate with a device as in versions up to and including 6.x. This setting is mainly for debugging purposes, since selecting Not used essentially turns off the use of CDI.
SCSI commands
NetWorker will use the CDI interface to send explicit SCSI commands to tape drives. This allows the best control of and status collection from a device and is the default for SCSI or SCSI-like tape drives directly under NetWorker's control.
Tape driver commands
NetWorker will use all available functions that are present in the operating system's tape driver interface. There are many capabilities that tape drivers lack which are unavailable to NetWorker if this setting is selected. Also, different OSes support different functions, so devices may behave differently on different platforms if this choice is selected.
Generic tape driver commands
NetWorker will use only those functions that are present on all Unix platforms. This will give results similar to the Not used selection, except that CDI code will be used instead of the pre 7.0 code.
NDMP
NetWorker will use NDMP to control NDMP connected tape devices. The exact functions available will likely depend on the NDMP server being used.
iSCSI
NetWorker will use iSCSI commands to control iSCSI connected tape devices.
Example: CDI: SCSI commands;

device block size    (read-write, single number, hidden)
This attribute allows you to override the device's default block size
on a per-device basis. Allowable values are handler default (the default setting for this attribute), 32kB, 64kB, 96kB, 128kB, 160kB, 192kB, 224kB, 256kB, 384kB, 512kB, 640kB, 768kB, 896kB, and 1024kB. Note that the block size for a NetWorker volume is set when the volume is labeled, so a change to this attribute will not have any effect until a volume is recycled. Also, resetting this attribute to handler default will not have any effect until the nsrmmd daemon for this device is restarted. Also, hardware platform limitations may result in the use of a block size smaller than that selected in this attribute, as some SCSI adapters or adapter drivers place limits on the maximum size of a SCSI transfer. These limits are usually silently enforced by NetWorker.
device file size     (read-write, single number, hidden)
This attribute allows you to override the default tape file size used by
NetWorker for this device. The file size is the number of blocks (tape records) that NetWorker will write before writing a filemark to the tape. Allowable values are between 100 and 3,000,000.
device load time     (read-write, single number, hidden)
This attribute allows you to override the default load time used by
NetWorker for this device. The load time is the number of seconds that NetWorker will continue trying to open a tape device after loading it into a tape drive. Allowed values are between 10 and 900 seconds.

This attribute is only used when CDI is set to Not used.

device eject time    (read-write, single number, hidden)
This attribute allows you to override the default tape eject time used by
NetWorker for this device. The eject time is the number of seconds that NetWorker will wait for a tape drive to eject a tape before trying to remove the tape from the drive. Allowed values are between 30 and 900 seconds.
device poll interval (read-write, single number, hidden)
This attribute allows you to override the default tape polling interval
used by NetWorker for this device. The polling interval is the number of seconds that NetWorker will wait between successive attempts to determine whether a tape drive is ready for use. Allowed values are between 1 and 30 seconds.
device min load tries        (read-write, single number, hidden)
This attribute allows you to override the load try limit used by
NetWorker for this device. The load try limit is the minimum number of times that NetWorker will attempt to determine if a tape drive is ready for use. This is primarily intended for operating systems where the open() system call to a tape drive that is not yet ready takes a very long time to fail. Allowable values are between 2 and 120.

This attribute is only used when CDI is set to Not used.

device tape flags    (read-write, hidden)
This attribute allows you to override the default flags used by
NetWorker for this device. The flags are settings that control major aspects of how NetWorker interacts with a device. Allowable values are TAPE, NOEOM, PHYSREC, SIZED, NOBSF, FILE, FILESYS, 32K, separated with either spaces or an 'or' symbol (|), and possibly preceded by an 'or' symbol (|).

WARNING: You should only use this attribute if you have been instructed to by EMC Technical Support, as misuse can cause the loss of data on any tapes that get loaded into the drive when this attribute is set to anything other than the default empty value.

device default capacity      (read-write, single number, hidden)
This attribute allows you to override the default capacity used by
NetWorker for this device. The default capacity is a typical value for the uncompressed storage capacity for drives of a given device type, and does not take different tape sizes or compression methods into account. It is only used for rough informational purposes and has no effect whatever on the amount of data that NetWorker will write to a tape.

This attribute is only used when CDI is set to Not used.

TapeAlert Critical   (read-write, no create)
This attribute stores a list of any Critical TapeAlert flags that may
have been collected from a tape drive during operations. Critical flags are those that might result in data loss. Often, these will require user intervention to resolve.

There are several Critical flags that will automatically be cleared by NetWorker when the particular flag no longer pertains to the drive. (The actual TapeAlert flag number is in parentheses after the flag name):

Media (4)
unrecoverable read, write or positioning error caused by tape
Write protect (9)
Attempt to write to a write-protected tape
Recoverable snapped tape (13)
tape has snapped in a drive where the tape can be ejected
Forced eject (16)
The tape was manually ejected from the drive
Clean now (20)
The tape drive needs to be cleaned
Note that all of the TapeAlert attributes really should be "delete-only" lists, since they are used purely to report problems that the hardware reports to us. However, NetWorker does not have a "delete only" attribute, so these are read-write. NetWorker does use the values held in these attributes to suppress repeated warnings about a problem that has already been reported in the daemon log, messages file and any NetWorker administrative GUI that might be open.
TapeAlert Warning   (read-write, no create)
This attribute stores a list of any Warning TapeAlert flags that may
have been collected from a tape drive during operations. Warning flags are those that do not indicate the immediate danger of data loss, but do represent some aspect of device operation that may lead to data loss in the future.

There are several Warning flags that will automatically be cleared by NetWorker:

Read warning (1)
The drive is having problems reading from the tape. No data has been lost but performance may suffer
Clean periodic (21)
The drive is due for routine cleaning

TapeAlert Information        (read-write, no create)
This attribute stores a list of any Information TapeAlert flags that may
have been collected from a tape drive during operations. Information flags represent occurrences that should be noted but which will not lead to loss of data.

There are several Information flags that will automatically be cleared by NetWorker:

No removal (10)
An attempt was made to eject a tape when the drive was in use
Cleaning media (11)
The tape in the drive is a cleaning tape and cannot be used for data
Unsupported format (12)
The tape in the drive is a format that is not supported by the drive
Nearing media life (19)
The tape cartridge is nearing the end of its specified life

autodetect id        (read/write, hidden)
This attribute is for identifying auto-detected devices.
It is used by NetWorker programs only, and should not be changed manually by the administrator.
server network interface (read/write, hidden)
This attribute defines the network address or the hostname which is used to communicate with mmd. This field is only relevant, if the device is connected to a storage node.
 

EXAMPLE

A complete example follows: 



                         type:NSR device;
                         name:/dev/nrst8;
                         message:writing, done
                         volume name:mars.017;
                         media family:tape;
                         media type:8mm 5GB;
                         enabled:Yes;
                         shared devices:done;
                         dedicated storage node:No;
                         write enabled:Yes;
                         read only:No;
                         target sessions:4;
                         volume label:mars.017;
                         volume default capacity:;
                         volume current capacity:5000 MB;
                         volume expiration:"Thu Sep 21 17:23:37 1996";
                         volume pool:Default;
                         volume flags:;
                         volume operation:;
                         volume write time:;
                         volume block size:32 KB;
                         volume id:32449;
                         accesses:199;
                         access weight:1;
                         consecutive errors:0;
                         max consecutive errors:20;
                         operation arg:;
                         volume message:;
                         NSR operation:;
                         minor mode:idle;
                         jukebox device:Yes;
                         statistics:elapsed = 257572, errors = 0, last rate = 397,
                           max clients = 3, file marks = 22, rewinds = 4,
                           files skipped = 1976, records skipped = 0,
                           current file = 2389, current record = 162,
                           seek files = 0, seek records = 0,
                           estimated kb = 0, amount kb = 6273,
                           file amount kb = 6273, sessions = 1;
                         cleaning required:No;
                         cleaning interval:2 weeks;
                         date last cleaned:"Tue Apr 11 15:10:32 1995";
                         auto media management:No;
                         unlabeled volume loaded:No;
                         logical name:;
                         logical type:;
                         logical family:;
                         connection process id:;
                         connection message:;
                         connection status:;
                         hardware id:;
                         save mount timeout:30;
                         save lockout:0;
                         CDI:SCSI commands;
                         device block size: handler default;
                         device default capacity: 20GB;
                         device eject time:;
                         device file size:;
                         device load time: 120;
                         device min load tries:;
                         device poll interval:;
                         device tape flags:;
                         TapeAlert Critical:Media, Cleaning;
                         TapeAlert Information:Read warning;
                         TapeAlert Warning:Cleaning media;
 

FILES

/nsr/res/nsrdb - files in this directory should never be edited directly. Use nsrmm(8), nsradmin(8), or NetWorker Management Console instead.  

SEE ALSO

nsr_getdate(3), ctime(3), nsr_resource(5), nsr_pool(5), nsr_schedule(5), nsr_service(5), nsr_storage_node(5), nsr_render_log(8), nsr(8), nsrmmd(8), nsrmm(8), nsradmin(8),

 

Index

NAME
SYNOPSIS
DESCRIPTION
ATTRIBUTES
EXAMPLE
FILES
SEE ALSO
This document was created by man2html, using the manual pages.
Time: 02:39:48 GMT, October 02, 2010