>>>>> On Tue, 17 Apr 2012 07:53:58 +0000, Chris Ord said:
> 
> Greetings list.
> 
> Whilst doing a restore I have discovered a failure on an LTO4 tape in one of 
> my pools. The error message indicated that the tape drive had changed from 
> variable to fixed block size.
> The tape changer(HP ML4048) can read the barcode correctly. However bacula 
> claimed that it was not a valid bacula volume.
> After a day of googling and reading the manual I tried to recover or list 
> using bls/bscan/bextract.
> In all instances bacula refused to move forward once it had identified that 
> there was no tape label.
> I resorted to btape(always slight scary). Once I had verified that the tape 
> didn't actually have a label I applied the label to the tape through the 
> command line tools.**
> 
> 
> **this was a big mistake - i was in the wrong terminal window and wasn't 
> concentrating
> 
> A btape status produces this:
> btape: btape.c:578 Rewound "Drive_0" (/dev/nst0)
> *status
>  Bacula status: file=0 block=0
>  Device status: BOT ONLINE IM_REP_EN file=0 block=0
> btape: btape.c:2138 Device status: 645. ERR=
> 
>  And a bextract attempt produces:
> [root@fileserver06 ~]# bextract -p -V VARCA038 /dev/nst0 
> /mnt/storview/restores/bextract/
> bextract: butil.c:287 Using device: "/dev/nst0" for reading.
> 17-Apr 17:36 bextract JobId 0: No slot defined in catalog (slot=0) for Volume 
> "VARCA038" on "Drive_0" (/dev/nst0).
> 17-Apr 17:36 bextract JobId 0: Cartridge change or "update slots" may be 
> required.
> 17-Apr 17:36 bextract JobId 0: 3301 Issuing autochanger "loaded? drive 0" 
> command.
> 17-Apr 17:36 bextract JobId 0: 3302 Autochanger "loaded? drive 0", result is 
> Slot 1.
> 17-Apr 17:36 bextract JobId 0: Ready to read from volume "VARCA038" on device 
> "Drive_0" (/dev/nst0).
> 17-Apr 17:36 bextract JobId 0: End of Volume at file 1 on device "Drive_0" 
> (/dev/nst0), Volume "VARCA038"
> 17-Apr 17:36 bextract JobId 0: End of all volumes.
> 0 files restored.
> 
> So that's great because it's labelled correctly,right?

Yes.


> So my understanding is btape has written an EOD or EOF? 

Yes.


> Is there a way to 'unmark' it to get at the existing blocks of data?

No.  Possibly a data recovery company could do it.

__Martin

------------------------------------------------------------------------------
Better than sec? Nothing is better than sec when it comes to
monitoring Big Data applications. Try Boundary one-second 
resolution app monitoring today. Free.
http://p.sf.net/sfu/Boundary-dev2dev
_______________________________________________
Bacula-users mailing list
Bacula-users AT lists.sourceforge DOT net
https://lists.sourceforge.net/lists/listinfo/bacula-users