Re: [Bacula-users] mtx: Unknown Storage Element Loaded

On Fri, Aug 14, 2009 at 12:01 PM, Dan Langille<dan AT langille DOT org> wrote:
> On Fri, August 14, 2009 11:39 am, Dan Langille wrote:
>>
>> On Fri, August 14, 2009 11:13 am, Dan Langille wrote:
>>> Changing the subject, given the change in subject.  :)
>>>
>>> On Thu, August 13, 2009 3:14 pm, John Drescher wrote:
>>>> On Thu, Aug 13, 2009 at 3:09 PM, John Drescher<drescherjm AT gmail DOT com>
>>>> wrote:
>>>>> On Thu, Aug 13, 2009 at 2:45 PM, Dan Langille<dan AT langille DOT org> 
>>>>> wrote:
>>>>>> On Thu, August 13, 2009 2:27 pm, Dan Langille wrote:
>>>>>>>
>>>>>>> On Thu, August 13, 2009 1:19 pm, Dan Langille wrote:
>>>>>>>> I am setting up a new autochanger / tape drive.  I'm trying to run
>>>>>>>> btape.
>>>>>>>> The basic test works, but I see this message when I start btape:
>>>>>>>>
>>>>>>>>  Autochanger "loaded? drive 0", result: nothing loaded.
>>>>>>>>
>>>>>>>> mtx-changer [and mtx] both disagree with this:
>>>>>>>>
>>>>>>>> $ sudo /etc/bacula/mtx-changer /dev/sg4 loaded 0 /dev/nst0 0
>>>>>>>> AAM240L4
>>>>>>>
>>>>>>> That is a problem.  You don't want the label.  You want the slt it
>>>>>>> came
>>>>>>> from.  See
>>>>>>> http://www.bacula.org/en/dev-manual/Autochanger_Resource.html#SECTION0017130000000000000000
>>>>>>>
>>>>>>>     loaded -- returns number of the slot that is loaded, base 1,
>>>>>>>               in the drive or 0 if the drive is empty.
>>>>>>>
>>>>>>> Current problem: I can't see how to get this information from the
>>>>>>> device.
>>>>>>> I'll keep working on it:
>>>>>>>
>>>>>>> $ sudo /usr/sbin/mtx -f /dev/sg4 inquiry
>>>>>>> Password:
>>>>>>> Product Type: Medium Changer
>>>>>>> Vendor ID: 'QUANTUM '
>>>>>>> Product ID: 'PX500           '
>>>>>>> Revision: '0033'
>>>>>>> Attached Changer: No
>>>>>>> [dlangille@backup01 bacula]$
>>>>>>
>>>>>> I think we have a problem:
>>>>>>
>>>>>> [dlangille@backup01 bacula]$ sudo /usr/sbin/mtx -f /dev/sg4 load 3
>>>>>> [dlangille@backup01 bacula]$ sudo /usr/sbin/mtx -f /dev/sg4 status
>>>>>>  Storage Changer /dev/sg4:1 Drives, 38 Slots ( 36 Import/Export )
>>>>>> Data Transfer Element 0:Full (Unknown Storage Element
>>>>>> Loaded):VolumeTag
>>>>>> =
>>>>>> AAM240L4
>>>>>>      Storage Element 1:Empty
>>>>>>      Storage Element 2:Empty
>>>>>>      Storage Element 3 IMPORT/EXPORT:Empty
>>>>>>      Storage Element 4 IMPORT/EXPORT:Full :VolumeTag=AAM241L4
>>>>>>
>>>>>> Should that 'Unknown Storage Element Loaded' be a 3 to indicate the
>>>>>> slot
>>>>>> it came from?
>>>>>>
>>>>>
>>>>> Here is what my mtx output looks like
>>>>>
>>>>> dev6 ~ # mtx -f /dev/autochanger1 status
>>>>>  Storage Changer /dev/autochanger1:2 Drives, 24 Slots ( 1
>>>>> Import/Export
>>>>> )
>>>>> Data Transfer Element 0:Full (Storage Element 17 Loaded):VolumeTag =
>>>>> A00036
>>>>> Data Transfer Element 1:Empty
>>>>>      Storage Element 1:Full :VolumeTag=A00030
>>>>>      Storage Element 2:Empty:VolumeTag=
>>>>>      Storage Element 3:Full :VolumeTag=A00058
>>>>>      Storage Element 4:Full :VolumeTag=A00053
>>>>>      Storage Element 5:Full :VolumeTag=A00023
>>>>>      Storage Element 6:Full :VolumeTag=A00006
>>>>>      Storage Element 7:Full :VolumeTag=A00007
>>>>>      Storage Element 8:Full :VolumeTag=A00052
>>>>>      Storage Element 9:Full :VolumeTag=A00028
>>>>>      Storage Element 10:Full :VolumeTag=A00020
>>>>>      Storage Element 11:Full :VolumeTag=A00054
>>>>>      Storage Element 12:Full :VolumeTag=A00039
>>>>>      Storage Element 13:Full :VolumeTag=A00048
>>>>>      Storage Element 14:Full :VolumeTag=A00012
>>>>>      Storage Element 15:Full :VolumeTag=A00068
>>>>>      Storage Element 16:Full :VolumeTag=A00069
>>>>>      Storage Element 17:Empty:VolumeTag=
>>>>>      Storage Element 18:Full :VolumeTag=A00065
>>>>>      Storage Element 19:Full :VolumeTag=A00066
>>>>>      Storage Element 20:Full :VolumeTag=A00067
>>>>>      Storage Element 21:Full :VolumeTag=A00062
>>>>>      Storage Element 22:Full :VolumeTag=A00063
>>>>>      Storage Element 23:Full :VolumeTag=A00064
>>>>>      Storage Element 24 IMPORT/EXPORT:Full :VolumeTag=A00029
>>>>>
>>>>> What version of mtx are you using?
>>>>>
>>>>> dev6 ~ # equery l mtx
>>>>> [ Searching for package 'mtx' in all categories among: ]
>>>>>  * installed packages
>>>>> [I--] [  ] sys-block/mtx-1.2.18 (0)
>>>>>
>>>>> It looks like I have 1.2.18
>>>>>
>>>>> John
>>>>>
>>>>
>>>> Ahh. If I manually load a tape using controls on the archive I get the
>>>> same. Bacula will pick this up correctly if I update slots in the
>>>> console however.
>>>>
>>>> dev6 ~ # mtx -f /dev/autochanger1 status
>>>>   Storage Changer /dev/autochanger1:2 Drives, 24 Slots ( 1
>>>> Import/Export
>>>> )
>>>> Data Transfer Element 0:Full (Storage Element 17 Loaded):VolumeTag =
>>>> A00036
>>>> Data Transfer Element 1:Full (Unknown Storage Element Loaded):VolumeTag
>>>> =
>>>> A00029
>>>>       Storage Element 1:Full :VolumeTag=A00030
>>>>       Storage Element 2:Empty:VolumeTag=
>>>>       Storage Element 3:Full :VolumeTag=A00058
>>>>       Storage Element 4:Full :VolumeTag=A00053
>>>>       Storage Element 5:Full :VolumeTag=A00023
>>>>       Storage Element 6:Full :VolumeTag=A00006
>>>>       Storage Element 7:Full :VolumeTag=A00007
>>>>       Storage Element 8:Full :VolumeTag=A00052
>>>>       Storage Element 9:Full :VolumeTag=A00028
>>>>       Storage Element 10:Full :VolumeTag=A00020
>>>>       Storage Element 11:Full :VolumeTag=A00054
>>>>       Storage Element 12:Full :VolumeTag=A00039
>>>>       Storage Element 13:Full :VolumeTag=A00048
>>>>       Storage Element 14:Full :VolumeTag=A00012
>>>>       Storage Element 15:Full :VolumeTag=A00068
>>>>       Storage Element 16:Full :VolumeTag=A00069
>>>>       Storage Element 17:Empty:VolumeTag=
>>>>       Storage Element 18:Full :VolumeTag=A00065
>>>>       Storage Element 19:Full :VolumeTag=A00066
>>>>       Storage Element 20:Full :VolumeTag=A00067
>>>>       Storage Element 21:Full :VolumeTag=A00062
>>>>       Storage Element 22:Full :VolumeTag=A00063
>>>>       Storage Element 23:Full :VolumeTag=A00064
>>>>       Storage Element 24 IMPORT/EXPORT:Empty:VolumeTag=
>>>
>>> My status output has reverted to 'Unknown Storage Element Loaded' today.
>>> I don't know why.  'update slots' does not affect the situation.  This
>>> means that 'loaded' does not return the correct value.  This renders the
>>> autochanger useless.  I'd like to know how to get this working.
>>
>> I had tried the 'update slots' approach.  That doesn't fix it.  What does
>> fix it is getting Bacula to load a tape into the drive.  I achieved that
>> by running a job.  I now see:
>>
>>    Data Transfer Element 0:Full (Storage Element 2 Loaded):VolumeTag =
>> AAM241L4
>
> I dispute the above now.
>
> I go with what Alan Brown said:
>
>> This happens consistently with tapes loaded out of i/o slots and the only
>> solution I've found is not to put tapes in them.
>
> We have 38 slots, 36 of which are labeled IMPORT/EXPORT.  Seems I should
> change this.  I hope it is configurable.
>
I can tell you that my IMPORT/EXPORT slot does work correctly after a
slight modification of the mtx-changer script. Although after I put a
tape in it the first time I run update slots bacula says there are 23
slots instead of 24 so it ignores slot 24. I run update slots a second
time and all is well.

John

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