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Man page of CHANGERS
CHANGERS
Section: Maintenance Commands (8)
Updated: Dec 11, 01m
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NAME
changers - list SCSI autochangers attached to the system
SYNOPSIS
changers
[
-dpv
]
[
-a
b.t.l
|
-f
filename
]
[
-l
]
DESCRIPTION
The
changers
program lists all of the SCSI autochangers (jukeboxes) connected
to the current system.
OPTIONS
- -a b.t.l
-
Selects a specific ordinal SCSI address, where
b
is the logical SCSI bus,
t
is the SCSI target,
and
l
is the SCSI logical unit number (LUN) on that target. See
libscsi(1m).
- -f filename
-
Specifies an explicit device file name for
changers
to use on platforms that support direct use of device file names for jukeboxes. At this time those platforms are Solaris 10+, AIX and Linux
- -d
-
Determines the names and addresses of the
autochanger's media elements (for example, tape drives).
- -l
-
Performs a complete LUN search for all SCSI adapters in the system. This argument is
accepted on all systems, but does not have any effect on HP-UX systems. Due to the
method used to scan for available devices on HP-UX systems, all accessible devices
are always shown, and the
-l
option has no additional effect. On all other platforms, the normal
behavior is to start checking at LUN 0 for SCSI devices. The first empty
LUN found will end the search for a given target ID. With the
-l
option, all LUN present on all target IDs for all SCSI busses in the
system will be checked for devices. This can take a
very long time
and should therefore only be used when necessary. For example, a Fibre
Channel adapter can support 126 target IDs, each of which may have 80 or
more LUNs. Checking all LUNs on this single adapter may take over 10 minutes.
- -p
-
Tells changers to use persistent device names for jukeboxes on platforms where persistent names are supported. Currently only linux has such support.
- -v
-
Lists more detailed information about each autochanger. The
details indicate how many media transports (MT, for example, robot arm),
storage transports (ST, for example, slot), import/export elements (IE,
for example, mail slot), and data transport (DT) elements the autochanger
contains. The
-v
option also provides information about the element movement matrix supported
by the autochanger.
EXAMPLE
Sample output is shown below:
hal$ changers -dv -a 0.2.0
scsidev@0.2.0:Vendor <SPECTRA>, Product <4000>
Data Transfer Element at address 80 is scsidev@0.5.0
Device:Vendor <HP>, Product <C1533A>
Type:Tape
System Name: /dev/rmt2.1
Data Transfer Element at address 81 is scsidev@0.6.0
Device:Vendor <HP>, Product <C1533A>
Type:Tape
System Name: /dev/rmt3.1
1 MT Element starting at address 79
60 ST Elements starting at address 1
1 IE Element starting at address 0
2 DT Elements starting at address 80
Element Movement Matrix
->DT, ->IE, ->ST, ->MT
MT->DT,MT->IE,MT->ST,______
ST->DT,ST->IE,ST->ST,ST->MT
IE->DT,______,IE->ST,IE->MT
DT->DT,DT->IE,DT->ST,DT->MT
______,______,______,______
______,______,______,______
______,______,______,______
______,______,______,______
SEE ALSO
libscsi(1m)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- EXAMPLE
-
- SEE ALSO
-
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Time: 02:37:10 GMT, October 02, 2010