Alan Brown wrote: > On Wed, 26 Jul 2006, Birger Blixt wrote: > >>> Here are the tricky parts (Only 45 slots reported today - one >>> magazine is out) >>> >>> Storage Changer /dev/sg16:2 Drives, 45 Slots ( 2 Import/Export ) >>> Data Transfer Element 0:Full (Storage Element 1 Loaded):VolumeTag = >>> ALOW0026 >>> Data Transfer Element 1:Full (Storage Element 9 Loaded):VolumeTag = >>> ALOW0039 >>> ... >>> Storage Element 41:Full :VolumeTag=AMED0042 >>> Storage Element 42:Full :VolumeTag=AMED0041 >>> Storage Element 43:Empty >>> Storage Element 44 IMPORT/EXPORT:Empty >>> Storage Element 45 IMPORT/EXPORT:Empty >>> >>> The mailslots are designated IMPORT/EXPORT and it seems to be a simple >>> parsing issue. >>> >>> I'm not sure if the report of which barcode is in which drive is being >>> used. Kern? > >> I wrote a script that check for tapes in the IMPORT/EXPORT slot, and >> take care >> of that by just talking to mysql, and bacula will then know that the >> tape is >> InChanger and which slot. > > There is a problem: > > When a tape is loaded directly into a drive from a mailslot, some > changers classify it as "unknown" > > EG: > > Storage Changer /dev/sg16:2 Drives, 45 Slots ( 2 Import/Export ) > Data Transfer Element 0:Empty > Data Transfer Element 1:Full (Storage Element 26 Loaded):VolumeTag = > ALOW0056 > Storage Element 1:Full :VolumeTag=ALOW0026 > Storage Element 2:Full :VolumeTag=ALOW0027 > ... > Storage Element 43:Full :VolumeTag=ALOW0058 > Storage Element 44 IMPORT/EXPORT:Full :VolumeTag=ALOW0040 > Storage Element 45 IMPORT/EXPORT:Full :VolumeTag=ALOW0041 > > $ mtx -f /dev/sg16 load 44 0 > > $ mtx -f /dev/sg16 status > > Storage Changer /dev/sg16:2 Drives, 45 Slots ( 2 Import/Export ) > Data Transfer Element 0:Full (Unknown Storage Element > Loaded):VolumeTag = ALOW0041 > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > Data Transfer Element 1:Full (Storage Element 26 Loaded):VolumeTag = > ALOW0056 > Storage Element 1:Full :VolumeTag=ALOW0026 > Storage Element 2:Full :VolumeTag=ALOW0027 > . > Storage Element 44 IMPORT/EXPORT:Full :VolumeTag=ALOW0040 > Storage Element 45 IMPORT/EXPORT:Empty > > This completly breaks "update slots", because "mtx-changer loaded" > will tell Bacula there is no tape at all in drive 0. Needless to say > the cascade effects (subsequent MTX calls dying when bacula attempts > to load tapes) and job failures are not nice. > I don't get that result in my adic scalar 480, but your problem is that you load the tape from the mailslot, you should use mtx transfer to move a tape from the mailslot to an empty slot first, then you can see a slot for the tape in the drive. (see my script) .
If you think about it, it's very logical to say Unknown storage element for a tape that don't have a reserved slot, since the mailslot may be busy when you unload 0. >> On my changer, an incoming tape is marked IMPORT/EXPORT:Full , but an >> outgoing >> tape has also the volumetag. > > That is because you don't have a barcode reader. > > This is also why you need the inventory command instead of just using > "status" I have a barcode reader, but it don't scan the tape until the transfer is done. > >> I make it simple and never remove any magazines, and have only one >> mailslot, so >> I can do: > > That is only an option for small backup sets - it doesn't scale up to > multiple mailslots or magazine changes - which even small site admins > tend to do as feeding 15 tapes into a library one at a time is > extremely tedious. > Well, I just test in a small scale and have only 2 TB data to backup , so my 80 tapes in the changer is enough so far. >> I have a pool for Offline tapes (PoolId=8), where the script check >> for tapes in >> that pool, and if InChanger=1 . > > Not really needed anymore, as the pool checks properly handle > inchanger or not (for the most part) > This was a thing I did in version 8 of the database, to make it easy for my script. And I'm an old Legato admin where we had a location on all tapes. >> What I need is some daemon that can catch a status from the changer >> when the >> mailslot is opened/closed, now I must run my script in a loop and >> then go to the >> changer and remove/insert tapes. > > Polling would do it. > > Be aware that MTX may be activated by 3rd party programs, so that > needs to be taken into account too. > My $MTX is a wrapper that make sure that the real mtx don't be called from 2 processes at the same time. > Additionally, some changers require _2_ status calls to return the > IMPORT/OUTPUT slots in normal operations after an open-door action - > the first pass simply ends at the last slot line. > > I have seen simlar behaviour with 500 slot CD changers too - in that > case MTX only returned the first 64 slots after the cabinet door was > closed, requiring a second call to see the full 500. My mtx wrapper do a wait until I see slot 82, which can take some time after inventory. This must be completely rewritten if I start to remove magazines. > >> I still need to run mtx inventory to update the slots/volume list, >> but I never >> run any scan from bacula since the mysql-database knows whats in the >> changer. > > Inventory is not needed if barcodes are used, so the scripts need to > handle that. > > In all likelihood, a non-recognised tape in a barcode-using library > has a bad label and should be isolated, instead of inventoried (odds > are high that if not labelled, it's probably blank and the inventory > action itself may well cause a running bacula job to abort if it pulls > a tape out of a drive currentrly in use) > > AB Yeah , I only import labeled tapes, or in rear cases when I label tapes, I use label barcodes slot=xx-xx (if I remember right) In this case I fill a magazine with blank tapes. /birre ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
