Re: [Bacula-users] Bacula recognizes only 7 slots in an 8-slot-changer

[John D. <dre...@gm...>]

On Mon, Jun 25, 2012 at 10:30 AM, Jens Grüntjes <jen...@eb...> wrote:
> Hello list,
>
> I have a strange problem with a Tandberg Storage Loader (some kind of
> autochanger) and bacula. I run Debian squeeze (Kernel 2.6.32-5-686)
> and bacula 5.0.2 (shipped with Debian). The changer has 8 slots and is
> attached to the computer via SCSI. Her is the output of lsscsi -g:
>
> boromir /etc/bacula/scripts # lsscsi -g
> [0:0:0:0]    disk    AMCC     9500S-8    DISK  2.06  /dev/sda  /dev/sg0
> [0:0:1:0]    disk    AMCC     9500S-8    DISK  2.06  /dev/sdb  /dev/sg1
> [1:0:0:0]    cd/dvd  TOSHIBA  ODD-DVD SD-C2732 1051  /dev/sr0  /dev/sg2
> [3:0:0:0]    tape    HP       Ultrium 4-SCSI   W51U  /dev/st0  /dev/sg3
> [3:0:0:1]    mediumx TANDBERG StorageLoader    0347  /dev/sch0  /dev/sg4
>
> Until last week I defined a slot in the autochanger as a "Cleaning
> Slot" so that I had 7 slots that could be used for backup-tapes. Then
> I decided to clean the drive manually because I read that cleaning the
> drive is actually not necessary. I could better use the slot for
> another backup tape.
>
> So I redefined the former cleaning-slot to an ordinary slot in the
> Tandberg autochanger. That was successfull because the front panel
> indicated the cleaning-slot with a "C" which was gone and replaced by
> an "8" (I defined the tape in slot 8 to be the cleaning tape).
>
> After that I started bconsole and issued an "update slots" command.
> The output looks like this:
>
> boromir /etc/bacula/scripts # bconsole
> Connecting to Director boromir.dmz:9101
> 1000 OK: boromir-dir Version: 5.0.2 (28 April 2010)
> Enter a period to cancel a command.
> *update slots
> Automatically selected Catalog: MyCatalog
> Using Catalog "MyCatalog"
> The defined Storage resources are:
>      1: boromir-sd-100
>      2: boromir-sd-1000
> Select Storage resource (1-2): 2
> Connecting to Storage daemon boromir-sd-1000 at 10.0.0.1:9103 ...
> 3306 Issuing autochanger "slots" command.
> Device "Tandberg" has 7 slots.
> Connecting to Storage daemon boromir-sd-1000 at 10.0.0.1:9103 ...
> 3306 Issuing autochanger "list" command.
> Catalog record for Volume "WOC4-01L4" updated to reference slot 1.
> Catalog record for Volume "WOC4-02L4" updated to reference slot 2.
> Catalog record for Volume "WOC4-03L4" updated to reference slot 3.
> Catalog record for Volume "WOC5-01L4" updated to reference slot 4.
> Catalog record for Volume "WOC5-02L4" updated to reference slot 5.
> Catalog record for Volume "WOC5-03L4" updated to reference slot 6.
> Catalog record for Volume "WOC1-01L4" updated to reference slot 7.
> *
>
> The strange line is the one that reads "Device "Tandberg" has 7
> slots." because there are actually 8 slots.
>
> I reset the Tandberg autochanger to the default settings and rebooted
> both the changer and the computer that it is attached to. There was no
> change regarding the "update slots" command.
>
> The I tried to get the number of slots via:
>
> boromir /etc/bacula/scripts # ./mtx-changer /dev/sg4 slots
> 7
>
> So, there are the 7 slots again.
>
> After some investigation I think it is not necessarily a problem with
> bacula but could be a problem with the OS itself. But nevertheless I
> hope you can help me on the issue. I can post config files as you
> need, please tell me what you need.
>
> Does anyone of you know where I can set the number of slots or where
> the number of slots is set by the OS?
>

I believe the problem is with mtx and probably how it handles your
mail slot. Assuming your changer has that feature..

John