Hi,

03.09.2008 17:58, Brian A. Seklecki wrote:
>> mtx for me counts from 1 for slots.
>>
>>  # mtx -f /dev/autochanger1 status
>>   Storage Changer /dev/autochanger1:2 Drives, 24 Slots ( 1 Import/Export )
>> Data Transfer Element 0:Empty
>> Data Transfer Element 1:Full (Storage Element 8 Loaded):VolumeTag = A00020
>>       Storage Element 1:Full :VolumeTag=A00030
>>       Storage Element 2:Full :VolumeTag=A00052
>>       Storage Element 3:Full :VolumeTag=A00058
>>       Storage Element 4:Full :VolumeTag=A00053
>>       Storage Element 5:Full :VolumeTag=A00023
> 
> 
> *sigh* Well that explains it then.  The Bacula Autochanger API therefore
> reflects the GNU/Linux mt(4) or st(4) driver numbering from 1.

Not necessarily... I haven't thought through that, but the solution 
might be already included in Bacula:

 From TFM:

"Changer Command = <command>
     This record is used to specify the external program to call and 
what arguments to pass to it. The command is assumed to be a standard 
program or shell script that can be executed by the operating system. 
This command is invoked each time that Bacula wishes to manipulate the 
autochanger. The following substitutions are made in the command 
before it is sent to the operating system for execution:

           %% = %
           %a = archive device name
           %c = changer device name
           %d = changer drive index base 0
           %f = Client's name
           %j = Job name
           %o = command  (loaded, load, or unload)
           %s = Slot base 0
           %S = Slot base 1
           %v = Volume name"

You notice the difference between %s and %S?

Might be worth a try...

> Psychology majors working on the GNU/Linux SCSI layer?
> 
> bsd$ sudo mtx -f /dev/pass0 status
>   Storage Changer /dev/pass0:1 Drives, 8 Slots ( 0 Import/Export )
> Data Transfer Element 0:Full (Storage Element 6 Loaded):VolumeTag =
> 000028
>       Storage Element 1:Full :VolumeTag=000027
>       Storage Element 2:Full :VolumeTag=000001
>       Storage Element 3:Full :VolumeTag=000026
>       Storage Element 4:Full :VolumeTag=000029
>       Storage Element 5:Full :VolumeTag=000024
>       Storage Element 6:Empty
>       Storage Element 7:Full :VolumeTag=000025
>       Storage Element 8:Full :VolumeTag=000022
> 
> bsd$ sudo chio stat -Vv
> picker 0:  voltag: <:0> avoltag: <:0>
> slot 0: <ACCESS,FULL> voltag: <000027:0> avoltag: <:0>
> slot 1: <ACCESS,FULL> voltag: <000001:0> avoltag: <:0>
> slot 2: <ACCESS,FULL> voltag: <000026:0> avoltag: <:0>
> slot 3: <ACCESS,FULL> voltag: <000029:0> avoltag: <:0>
> slot 4: <ACCESS,FULL> voltag: <000024:0> avoltag: <:0>
> slot 5: <ACCESS> voltag: <:0> avoltag: <:0>
> slot 6: <ACCESS,FULL> voltag: <000025:0> avoltag: <:0>
> slot 7: <ACCESS,FULL> voltag: <000022:0> avoltag: <:0>
> drive 0: <FULL> voltag: <000028:0> avoltag: <:0>
> 
> I'd be curious what the Sun/SCO/AIX/HFUX people see on their kernel.

Sun plus mtx sees slot numbers starting with 1. Actually, I believe 
that's mtx - as far as I recall from reading SCSI specs and library 
manuals, the actual numbers the devices use internally are a lot more 
"interesting" than what is reported by mtx or chio.

Arno

> ~BAS
> 
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-- 
Arno Lehmann
IT-Service Lehmann
Sandstr. 6, 49080 Osnabrück
www.its-lehmann.de

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