Hello Andrew,
Rather than use the /dev/nst0 and /dev/nst1 devices, you should use the device
nodes' "by-id" node names. These do not change over reboots the way the
/dev/nstX ones can.
First determine the scsi devices in the system and identify the "sg" node for
the library's changer device:
----8<----
# lsscsi -g
[0:0:0:0] disk IBM RootOS V1.0 /dev/sda /dev/sg0
[0:0:1:0] disk IBM Storage V1.0 /dev/sdb /dev/sg1
...
[3:0:5:0] tape HP Ultrium 4-SCSI B63Z /dev/st0 /dev/sg17
[3:0:5:1] mediumx QUANTUM UHDL 0091 /dev/sch0 /dev/sg18
----8<----
In the above case, the Library's SCSI "sg" device node is: /dev/sg18
Now, find that matching 'sg' device in the /dev/tape/by-id directory:
----8<----
# ls -la /dev/tape/by-id/
total 0
drwxr-xr-x 2 root root 100 Jun 9 20:33 .
drwxr-xr-x 4 root root 80 Jun 9 16:29 ..
lrwxrwxrwx 1 root root 9 Jun 9 16:29 scsi-350060b0000ba645e -> ../../st0
lrwxrwxrwx 1 root root 10 Jun 9 16:29 scsi-350060b0000ba645e-nst -> ../../nst0
lrwxrwxrwx 1 root root 10 Jun 9 16:29 scsi-350060b0000XXXXXX-nst -> ../../nst1
lrwxrwxrwx 1 root root 10 Jun 9 20:33 scsi-3500e09efff0e1b57 -> ../../sg18
----8<----
In your SD's Autochanger and Device resources use:
/dev/tape/by-id/scsi-3500e09efff0e1b57 _instead_ of /dev/sg18
And use:
/dev/tape/by-id/scsi-350060b0000ba645e-nst _instead_ of /dev/nst0
/dev/tape/by-id/scsi-350060b0000XXXXXX-nst _instead_ of /dev/nst1
In this example, our Autochanger and devices in bacula-sd.conf would be:
bacula-sd.conf
----8<----
... rest of config...
Autochanger {
Name = QuantumSuperLoader
Device = "LTO-0", "LTO-1"
ChangerDevice = /dev/tape/by-id/scsi-3500e09efff0e1b57
... rest of config...
}
Device {
Name = LTO-0
DriveIndex = 0
MediaType = LTO-TAPE
ArchiveDevice = /dev/tape/by-id/scsi-350060b0000ba645e-nst
ChangerDevice = /dev/tape/by-id/scsi-3500e09efff0e1b57
... rest of config...
}
Device {
Name = LTO-1
DriveIndex = 1
MediaType = LTO-TAPE
ArchiveDevice = /dev/tape/by-id/scsi-350060b0000XXXXXX-nst
ChangerDevice = /dev/tape/by-id/scsi-3500e09efff0e1b57
... rest of config...
}
... rest of config...
----8<----
Save the bacula-sd.conf config file and test the syntax:
# bacula-sd -t -c /path/to/bacula-sd.conf
If no errors, restart bacula-sd and test.
Now you can relax knowing that your devices will not switch ids ever again (in
a perfect world :)
Hope this helps!
Bill
--
Bill Arlofski
http://www.revpol.com/bacula
-- Not responsible for anything below this line --
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