Sorry about the /dev/sch0. I've written udev rules to use consistent names
regardless of what udev does - I do use the /dev/sgX for changer
identification. If you've rebooted your system, the output from lsscsi -g may
have changed. You still need the Drive Index line in your bacula-sd.conf .
Ahhh - bacula-sd runs as the bacula user. Did you add bacula to the tape group?
Patti
On 11/5/18, 1:34 PM, "William Muriithi" <will...@perasotech.com> wrote:
Hi Patti,
> Use /dev/sch0, not /dev/sg2. Bear in mind, udev is not your friend. If
you ever add another tape drive to your library or expand your device fabric,
these device references will/can change with every system boot. As is, the
/dev/sgX references can change with reboots, but if you only have one changer
and one drive, the /dev/sch0 and /dev/nst0 devices should remain static.
He seem to have the same problem too
https://unix.stackexchange.com/questions/193472/interacting-with-tape-library-on-centos-7-via-mtx
Hmm, it doesn't seem to live /dev/sch0. I agree with you that using
/dev/sgX isn't reliable, but when I made the change suggested above, it failed
with the error below:
Tape block granularity is 1024 bytes.
btape: butil.c:290-0 Using device: "/dev/nst0" for writing.
05-Nov 13:17 btape JobId 0: 3991 Bad autochanger "loaded? drive 0" command:
ERR=Child exited with code 1.
Results=/dev/sch0 is not an sg device, or old sg driver
> Also, you have "Drive Index = 1" commented out. Uncomment and change it
to "Drive Index = 0". All tape drives in a changer must have an index and the
first one is zero. Give those a try.
Hmm, I have seem this previously and when I implemented it, I had this
issue. I have 8 tapes, do I believe I need 8 archive device. However, the
system only 3 sgX devices. How would one overcome this problem?
[root@eng-backup02 ~]# ls -ltr /dev/sg*
crw-rw----. 1 root disk 21, 0 Oct 10 15:42 /dev/sg0
crw-rw----. 1 root tape 21, 1 Nov 5 12:16 /dev/sg1
crw-rw----. 1 root tape 21, 2 Nov 5 12:16 /dev/sg2
[root@eng-backup02 ~]#
Regards,
William
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