On Fri, Mar 6, 2009 at 6:29 PM, (private) HKS <hks.private AT gmail DOT com>
wrote:
> On Fri, Mar 6, 2009 at 3:29 PM, <mark.bergman AT uphs.upenn DOT edu> wrote:
>>
>>
>> In the message dated: Fri, 06 Mar 2009 14:30:12 EST,
>> The pithy ruminations from "(private) HKS" on
>> <Re: [Bacula-users] mtx-changer loaded issues> were:
>> => On Fri, Mar 6, 2009 at 2:00 PM, Arno Lehmann <al AT its-lehmann DOT de>
>> wrote:
>> => > Hi,
>> => >
>> => > 06.03.2009 16:20, (private) HKS wrote:
>> => >> Thanks for the response.
>> => >>
>> => >> On Fri, Mar 6, 2009 at 3:12 AM, Arno Lehmann <al AT its-lehmann DOT
>> de> wrote:
>> => >>> Hi,
>> => >>>
>> => >>> 05.03.2009 21:57, (private) HKS wrote:
>> => >>>> Hello,
>> => >>>>
>> => >>>> I'm introducing a Dell Powervault 124T autochanger to my Bacula
>> => >>>> config, and am having a bit of trouble with the mtx-changer script.
>>
>> I've got a Dell PV132T.
>>
>> Which "mtx" does the script call? I'm running 1.2.18rel with no problems.
>>
>> => >>>>
>> => >>>> Bacula 2.2.8 on OpenBSD 4.4.
>>
>> Oh. Hmm... I haven't done anything with OpenBSD, so I'm not sure how much I
>> can
>> help.
>>
>>
>> [SNIP!]
>>
>> =>
>> =>
>> => Okay, I think I understand how Bacula is handling these. I'm testing
>> => some other modifications to the mtx-changer script, though. If anybody
>> => has a working autochanger on Linux, could you send me the following
>> => output for comparison's sake?
>>
>> I can send you some of that info.
>>
>> =>
>> => - mtx -f <device> inventory
>>
>> sudo mtx -f /dev/changer inventory
>>
>> (no output, exit status = 0)
>>
>> => - mtx -f <device> status
>> sudo mtx -f /dev/changer status
>> Storage Changer /dev/changer:2 Drives, 24 Slots ( 1 Import/Export )
>> Data Transfer Element 0:Empty
>> Data Transfer Element 1:Full (Storage Element 18 Loaded):VolumeTag = 000127
>> Storage Element 1:Full :VolumeTag=000314
>> Storage Element 2:Full :VolumeTag=000311
>> Storage Element 3:Full :VolumeTag=000094
>> Storage Element 4:Full :VolumeTag=000315
>> Storage Element 5:Full :VolumeTag=000317
>> Storage Element 6:Full :VolumeTag=000113
>> Storage Element 7:Full :VolumeTag=000095
>> Storage Element 8:Full :VolumeTag=000123
>> Storage Element 9:Full :VolumeTag=000014
>> Storage Element 10:Full :VolumeTag=000118
>> Storage Element 11:Full :VolumeTag=000050
>> Storage Element 12:Full :VolumeTag=000114
>> Storage Element 13:Full :VolumeTag=000051
>> Storage Element 14:Full :VolumeTag=000116
>> Storage Element 15:Full :VolumeTag=000159
>> Storage Element 16:Full :VolumeTag=000301
>> Storage Element 17:Full :VolumeTag=000146
>> Storage Element 18:Empty:VolumeTag=
>> Storage Element 19:Full :VolumeTag=000141
>> Storage Element 20:Full :VolumeTag=000142
>> Storage Element 21:Full :VolumeTag=000144
>> Storage Element 22:Full :VolumeTag=000046
>> Storage Element 23:Full :VolumeTag=000143
>> Storage Element 24 IMPORT/EXPORT:Empty:VolumeTag=
>>
>> => - mtx-changer <device> list
>>
>> sudo mtx -f /dev/changer list
>> Usage:
>> mtx --version
>> mtx [ -f <loader-dev> ] noattach <more commands>
>> mtx [ -f <loader-dev> ] inquiry | inventory
>> mtx [ -f <loader-dev> ] [nobarcode] status
>> mtx [ -f <loader-dev> ] first [<drive#>]
>> mtx [ -f <loader-dev> ] last [<drive#>]
>> mtx [ -f <loader-dev> ] next [<drive#>]
>> mtx [ -f <loader-dev> ] previous [<drive#>]
>> mtx [ -f <loader-dev> ] [invert] load <storage-element-number> [<drive#>]
>> mtx [ -f <loader-dev> ] [invert] unload [<storage-element-number>][<drive#>]
>> mtx [ -f <loader-dev> ] [eepos eepos-number] transfer
>> <storage-element-number> <storage-element-number>
>> mtx [ -f <device> ] eject
>>
>> => - mtx-changer <device> loaded 0 <drive> <drive index>
>>
>> I've got backups running right now, so I'm not going to move tapes around.
>>
>> In addition, the version of mtx I'm running uses a different syntax (see
>> above).
>>
>> =>
>> => This would be really, really helpful.
>>
>> I hope so...
>>
>> Mark
>>
>
>
> Thanks a ton to John and Mark for getting me that information so
> quickly. That was a great help.
>
> I rewrote much of mtx-changer to interact more happily with my
> environment (OpenBSD 4.4 w/Dell Powervault 124T 16-tape changer, for
> those just joining us). My goals were to make it more or less
> slot-agnostic so I don't have to be careful about sticking the right
> tapes into the right slots and all that nonsense. The trick was
> treating "slots" from Bacula like volume tags for chio, and vice
> versa.
>
> I *think* this will work, but I haven't been able to test because
> bacula-sd hangs if I start it up without a tape loaded. By hangs I
> mean "status storage" never returns - it just sits on the "Connecting"
> line. This happens with the default mtx-changer script as well, and I
> haven't been able to track down any rhyme or reason here. When I push
> all sd messages to a log file, it just shows this upon startup:
> --
> 06-Mar 17:17 bacula-sd JobId 0: 3301 Issuing autochanger "loaded?
> drive 0" command.
> 06-Mar 17:17 bacula-sd JobId 0: 3302 Autochanger "loaded? drive 0",
> result: nothing loaded.
> 06-Mar 17:17 bacula-sd JobId 0: 3301 Issuing autochanger "loaded?
> drive 0" command.
> 06-Mar 17:17 bacula-sd JobId 0: 3302 Autochanger "loaded? drive 0",
> result: nothing loaded.
> --
>
> Logging all actions to mtx-changer reveals nothing either. Running
> mtx-changer with sd's arguments, I just get back "0" if nothing is
> loaded. Can anybody shed some light on this? If I start bacula-sd with
> a tape loaded, "status storage" works just fine.
>
> -HKS
>
Changed the subject to better reflect the current issue.
Attempting to run bacula-sd or btape when my drive is empty results in
the application hanging. I believe this is related to section 37.1.1
in the manual. Can anyone confirm that Bacula simply does not operate
properly when configured to use a tape drive that does not have a tape
in it? Are there any workarounds for this?
-HKS
relevant bacula-sd.conf:
----
Autochanger {
Name = 124T-Autochanger
Device = 124T-Drive
Changer Command = "/usr/local/libexec/bacula/mtx-changer %c %o %s %a %d"
Changer Device = /dev/ch0
}
Device {
Name = 124T-Drive
Drive Index = 0
Media Type = 124T
Archive Device = /dev/nrst0
AutomaticMount = yes; # when device opened, read it
AlwaysOpen = yes;
RemovableMedia = yes;
RandomAccess = no;
AutoChanger = yes
Hardware End of Medium = No
Fast Forward Space File = No
BSF at EOM = yes
}
----
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