In the message dated: Tue, 08 May 2007 16:54:56 PDT,
The pithy ruminations from Mike Toscano on
<[Bacula-users] cannot open SCSI device '/dev/sg2' - Permission denied> were:
=> Hi. When I try to run backups, I get an error like this:
=> 08-May 11:22 bmm-s1-sd: Alert: cannot open SCSI device '/dev/sg2' -
=> Permission denied
=> 08-May 11:22 bmm-s1-dir: Client1.2007-05-08_11.19.52 Error: Bacula
=> 1.36.3 (22Apr05):
=>
=> What I've tried:
=> Restarting all bacula services.
=> Combing through my config files.
=> Google -- I couldn't find anyone with the same problem.
=> Creating new volumes for tapes.
=> Staring blankly at the screen.
=> Cursing.
=> Sobbing.
=>
=> Services seem to be running fine, media is mounted and labeled in
=> bconsole.
=>
=> Everything was running beautifully for a couple months now. We had to
=> shut the backup server down because of work on our building and after
=> bringing the server back up and changing tapes, I have not been able
=> to do any back-ups successfully. :(
=>
=> Can anyone give me a shove in the right direction on what I've got
=> wrong here?
=>
Sure. The /dev/sg2 device is almost certainly owned by root, and the user
"bacula" doesn't have permission to open the device.
I'd suggest putting something into your system startup scripts (possibly
/etc/rc.local, or the script that starts bacula) to change the ownership or
group of the device to something where bacula has permissions.
For example, on my server:
crw-rw---- 1 root disk 21, 10 Mar 29 19:55 /dev/sg10
where bacula is in group "disk".
Also, in some OS's, the scsi devices are not fixed--if the OS discovers them in
a different order (not uncommon in a SAN environment), the device that controls
the tape drive may have a different number at each boot.
I've written a script to walk through the /dev/sg* devices, run an mtx command
to determine if that device is the tape changer, and create a symlink from
/dev/sgWHATEVER to /dev/changer. That way, all my bacula configs (and other
admin tools and documentation) can always refer to /dev/changer.
Mark
=> Thank you!
=> Mike
=>
----
Mark Bergman [EMAIL PROTECTED]
System Administrator
Section of Biomedical Image Analysis 215-662-7310
Department of Radiology, University of Pennsylvania
http://pgpkeys.pca.dfn.de:11371/pks/lookup?search=mark.bergman%40.uphs.upenn.edu
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