> Hello Phil,
Hello, Kern, Phill,
> There should be no difference in how Bacula handles tapes between 7.4.7
> and 9.0.x. If there is I would suggest that you carefully document it
> in a way that I can "see" the problem and easily reproduce it so that I
> can fix it. mtx-changer will *not* work unless you have an
> autochanger. There is no fake autochanger for tapes. There are two
> types of "fake" autochangers for Disks. The first one is something like
> mhvtl that is a program that simulates in detail and autochanger. The
> second is the Bacula virtual disk autochanger.
>
> If you have a real stand-alone tape drive, I personally know of no way
> to make it work with mtx, and if Bacula does not work with it, I will be
> happy to work on fixing it, but only if it is clearly documented in a
> detailed but very concise way.
I think Phil refers to this is script
<http://bacula.us/manual-tape-drive-automation/>.
I documented it many years ago. This is the original thread
<http://bacula.10910.n7.nabble.com/automount-with-single-non-autoloader-drive-td28536.html>.
I'm not sure who was the original poster. I will try to find it now.
> The Bacula virtual disk autochanger and certain other cases are very
> nicely documented in several of the white papers that are on www.bacula.org.
Regards,
> Best regards,
>
> Kern
>
>
> On 08/01/2017 08:44 PM, Phil Stracchino wrote:
>> I've just upgraded from Bacula 7.4.7, in which my standalone LTO4 tape
>> drive worked perfectly, to Bacula 9.0.2, in which it doesn't. In 9.0.2,
>> I had to use the workaround of setting up a fake autochanger with one drive.
>>
>> The problem is that this trick is not documented, and I had to largely
>> figure it out by trial and error and reference to outdated documentation
>> that doesn't address the fake-autochanger case anyway. The mtx-changer
>> command is just copied directly from a standard changer invocation, and
>> Changer Device is a total guess - it's the generic SCSI device
>> corresponding to the tape drive. I don't know if it's right, wrong, or
>> unneeded, or what to use in its place. I also don't know whether any of
>> the directives in the Device description are obsolete or not needed any
>> more.
>>
>>
>>
>> Here's the configuration in my Director:
>>
>> Storage {
>> Name = babylon5-sd
>> Address = babylon5.babcom.com
>> SDPort = 9103
>> Password = "********************"
>> Device = babylon5-changer
>> Media Type = LTO-4
>> Maximum Concurrent Jobs = 20
>> Autochanger = yes
>> }
>>
>>
>> And on the relevant Storage:
>>
>> Autochanger {
>> Name = babylon5-changer
>> Device = LTO-4
>> Changer Command = "/usr/libexec/bacula/mtx-changer %c %o %S %a %d"
>> Changer Device = /dev/sg5 # this is largely a guess
>> }
>>
>> Device {
>> Name = LTO-4
>> Media Type = LTO-4
>> Archive Device = /dev/nst0
>> Drive Index = 0 # pretend
>> Autochanger = yes # pretend
>> AutomaticMount = yes # when device opened, read it
>> AlwaysOpen = yes
>> OfflineOnUnmount = yes
>> RemovableMedia = yes
>> RandomAccess = no
>> Maximum File Size = 5GB
>> Maximum Block Size = 2048000
>> Spool Directory = /var/tmp/bacula
>> Maximum Spool Size = 10GB
>> Maximum Job Spool Size = 5GB
>> }
>>
>>
>> Now, this *WORKS.* But it throws non-fatal mtx-changer errors like this:
>>
>>
>> 01-Aug 14:11 minbar-dir JobId 14328: BeforeJob: Client babylon5 has address
>> +10.24.32.10
>> 01-Aug 14:11 minbar-dir JobId 14328: Start Backup JobId 14328,
>> +Job=Babylon5_Backup.2017-08-01_14.11.23_04
>> 01-Aug 14:11 minbar-dir JobId 14328: Using Device "LTO-4" to write.
>> 01-Aug 14:11 babylon5-sd JobId 14328: No slot defined in catalog
>> (slot=0) for Volume
>> +"LTO4-FULL-0024" on "LTO-4" (/dev/nst0).
>> 01-Aug 14:11 babylon5-sd JobId 14328: Cartridge change or "update slots"
>> may be
>> +required.
>> 01-Aug 14:11 babylon5-sd JobId 14328: 3991 Bad autochanger "loaded? drive 0"
>> +command: ERR=Child exited with code 1.
>> Results=mtx: Request Sense: Long Report=yes
>> mtx: Request Sense: Valid Residual=no
>> mtx: Request Sense: Error Code=70 (Current)
>> mtx: Request Sense: Sense Key=Illegal Request
>> mtx: Request Sense: FileMark=no
>> mtx: Request Sense: EOM=no
>> mtx: Request Sense: ILI=no
>> mtx: Request Sense: Additional Sense Code = 20
>> mtx: Request Sense: Additional Sense Qualifier = 00
>> mtx: Request Sense: BPV=no
>> mtx: Request Sense: Error in CDB=no
>> mtx: Request Sense: SKSV=no
>> READ ELEMENT STATUS Command Failed
>>
>> 01-Aug 14:11 babylon5-sd JobId 14328: Recycled volume "LTO4-FULL-0007"
>> on Tape
>> +device "LTO-4" (/dev/nst0), all previous data lost.
>>
>>
>> I get similar errors from mounting and unmounting volumes. Clearly
>> mtx-changer is really not on board with this whole "fake autochanger'
>> thing. Does anyone know what changes I should make to eliminate these
>> errors? Is there a specific way to configure mtx-changer for the "fake
>> autochanger" case? Should I be even using a Changer Command at all if
>> there is no Changer?
>>
>>
>>
>
>
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--
===========================================================================
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05-001 | ITIL-F
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