2009/4/18 Daniel Bareiro <daniel-listas AT gmx DOT net>:
> On Monday, 30 March 2009 23:31:13 -0300,
> Daniel Bareiro wrote:
>
>> During the last process of backup scheduled by Bacula, I received the
>> following notification by email.
>>
>> 30-Mar 08:27 backup1-sd: Please mount Volume "EducarFull0004" on Storage
>> Device "Drive-1" (/dev/nst0) for Job Cygnus.2009-03-28_00.00.19
>>
>> Reviewing the state of the volumes, I found the following situation:
>>
>> Pool: Full
>> +---------+----------------+-----------+----------------+----------+--------------+---------+------+-----------+-----------+---------------------+
>> | MediaId | VolumeName     | VolStatus | VolBytes       | VolFiles | 
>> VolRetention | Recycle | Slot | InChanger | MediaType | LastWritten         |
>> +---------+----------------+-----------+----------------+----------+--------------+---------+------+-----------+-----------+---------------------+
>> |   1,036 | EducarFull0002 | Append    | 31,702,518,884 |       44 |   
>>  7,776,000 |       1 |    2 |         0 | DLT-7000  | 2008-05-13 22:26:53 |
>> |   1,038 | EducarFull0001 | Purged    | 34,189,164,863 |       50 |   
>>  7,776,000 |       1 |    1 |         0 | DLT-7000  | 2008-04-07 00:48:17 |
>> |   1,039 | EducarFull0003 | Purged    | 38,584,790,717 |       69 |   
>>  7,776,000 |       1 |    3 |         0 | DLT-7000  | 2008-05-04 23:32:04 |
>> |   1,042 | EducarFull0005 | Purged    | 34,119,283,723 |       66 |   
>>  7,776,000 |       1 |    1 |         0 | DLT-7000  | 2008-08-04 00:01:13 |
>> |   1,043 | EducarFull0006 | Purged    | 35,871,291,720 |       44 |   
>>  7,776,000 |       1 |    2 |         0 | DLT-7000  | 2008-09-08 01:28:55 |
>> |   1,046 | EducarFull0009 | Purged    | 38,888,730,357 |       77 |   
>>  7,776,000 |       1 |    3 |         0 | DLT-7000  | 2008-09-07 22:56:25 |
>> |   1,047 | EducarFull0004 | Append    | 18,302,518,203 |       43 |   
>>  7,776,000 |       1 |    1 |         0 | DLT-7000  | 2008-11-18 00:23:00 |
>> |   1,048 | EducarFull0007 | Purged    | 38,663,188,669 |       69 |   
>>  7,776,000 |       1 |    2 |         0 | DLT-7000  | 2008-11-02 00:39:19 |
>> |   1,049 | EducarFull0008 | Purged    | 33,354,768,116 |       39 |   
>>  7,776,000 |       1 |    3 |         0 | DLT-7000  | 2008-11-02 03:03:03 |
>> |   1,050 | EducarFull0010 | Full      | 35,826,198,945 |       62 |   
>>  7,776,000 |       1 |    1 |         1 | DLT-7000  | 2009-03-28 01:26:49 |
>> |   1,051 | EducarFull0011 | Full      | 34,782,209,484 |       62 |   
>>  7,776,000 |       1 |    2 |         1 | DLT-7000  | 2009-03-01 01:12:40 |
>> |   1,052 | EducarFull0012 | Full      | 43,395,971,463 |       52 |   
>>  7,776,000 |       1 |    3 |         1 | DLT-7000  | 2009-03-01 03:44:33 |
>> +---------+----------------+-----------+----------------+----------+--------------+---------+------+-----------+-----------+---------------------+
>>
>> Apparently Bacula is wanting to use a volume that is not in autochanger and
>> whose state is Append when being all the volumes in autochanger in Full
>> state.
>
> I was reading in the Bacula's manual about the algorithm that Bacula
> uses when it needs a new volume, and comparing it with the behavior that
> mentioned above, there is something is not clear to me of the steps
> that the algorithm follows:
>
> * "If the request is for an Autochanger device, look only for Volumes in
>  the Autochanger (i.e. with InChanger set and that have the correct
>  Storage device)".
>
>  Then why it can be that a volume with InChanger=0 has been chosen?
>
None of the volumes with InChanger=1 were suitable.

>
> * "Search the Pool for a Volume with VolStatus=Append (if there is more
>  than one, the Volume with the oldest date last written is chosen. If
>  two have the same date then the one with the lowest MediaId is
>  chosen)".
>
>  With that criterion I think that it must have chosen the
>  EducarFull0002 volume. Why it can be that EducarFull0004 has been
>  chosen?
>
That I do not know.

John

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