Hello,
Thanks for the feedback -- very interesting. I'll add this to the manual so
that others will be aware of the problems that powering off a unit can cause.
Regards,
Kern
On Wednesday 26 September 2007 21:19, Mike Seda wrote:
> Kern,
> I think I have found the cause of the MTEOM errors that I have been
> experiencing from time to time. These MTEOM errors are not caused by
> Bacula.
>
> In the past few months, I have rebooted my Quantum PX502 library a few
> times (once every two months or so) while a tape was mounted in the
> drive. This caused the HP (LTO-3 nFC) tape drive in the library to write
> an MTEOM marker to the mounted tape, which made it impossible for Bacula
> to write beyond that point (although reading was possible).
>
> Basically, Quantum told me to unmount the tape before I ever
> powercycle/reboot the library again.
>
> The tapes can be recovered by backing them up and reformatting them (to
> get rid of the MTEOM marker).
>
> Basically, my tapes that I thought were bad are actually recoverable.
>
> Cheers,
> Mike
>
> Mike Seda wrote:
> > I should mention that all of my other tapes are working flawlessly with
> > my current setup... I just have this one tape that gives MTEOM errors...
> > There was nothing in the system log, but I think I know what caused the
> > problem... I accidentally rebooted my bacula server while bacula was
> > writing to tape... The reboot operation just hung, and I hard-powered
> > the bacula server off since I figured I was screwed anyway... The tape
> > clearly didn't like this... I think the tape is slightly damaged... I
> > can restore from it, but cannot append to it... How can I move the data
> > from this tape onto another? Probably migration, huh?
> >
> > Kern Sibbald wrote:
> >> On Saturday 31 March 2007 20:38, Mike Seda wrote:
> >>> I have a similar MTEOM error with one of my tapes. My drive and other
> >>> tapes are totally fine. I can even restore from this tape, but just
> >>> cannot append to it. The exact error is below:
> >>>
> >>> 18-Mar 02:17 uwharrie-sd: Volume "MSR122L3" previously written, moving
> >>> to end of data.
> >>> 18-Mar 02:35 uwharrie-sd: tsali.2007-03-17_23.05.00 Error: Unable to
> >>> position to end of data on device "Drive-1" (/dev/nst0): ERR=dev.c:922
> >>> ioctl MTEOM error on "Drive-1" (/dev/nst0). ERR=Input/output error.
> >>> 18-Mar 02:35 uwharrie-sd: Marking Volume "MSR122L3" in Error in
> >>> Catalog.
> >>>
> >>> My setup is:
> >>> Bacula 2.0.1
> >>> RHEL 4 AS
> >>> Quantum PX502 (FC, 1 HP LTO-3 Drive)
> >>>
> >>> Any thoughts?
> >>
> >> Anyone who gets MTEOM errors on a tape that has been written with no
> >> error messages, has a serious problem -- either improperly configured
> >> (tape drive parameters/modes don't agree with those in Bacula's device
> >> resource), or hardware problems.
> >>
> >> Start by looking at your system log and Bacula output for errors. If
> >> there are, then they need to be resolved. If not, then it could well be
> >> configuration so re-run the 9 (or 10) testing steps documented in the
> >> tape testing chapter of the manual.
> >>
> >>> Julien Cigar wrote:
> >>>> Bill Moran wrote:
> >>>>> In response to Julien Cigar <[EMAIL PROTECTED]>:
> >>>>>> We've bought a new tape drive here, a Sony SDX-700C (AIT-3), with
> >>>>>> new tapes. I'm running Bacula 1.38.11 under (Debian) Linux (2.6.18)
> >>>>>> I've run the btape test / btape fill with success. The tape is
> >>>>>> initialized correctly (variable block mode + ...) :
> >>>>>>
> >>>>>> phoenix:/home/jcigar# cat /etc/stinit.def
> >>>>>> {buffer-writes read-ahead async-writes}
> >>>>>>
> >>>>>> manufacturer=SONY model = "SDX-700C" {
> >>>>>> mode1 blocksize=0 compression=1
> >>>>>> }
> >>>>>>
> >>>>>> phoenix:/home/jcigar# mt -f /dev/nst0 status
> >>>>>> SCSI 2 tape drive:
> >>>>>> File number=0, block number=0, partition=0.
> >>>>>> Tape block size 0 bytes. Density code 0x32 (AIT-3).
> >>>>>> Soft error count since last status=0
> >>>>>> General status bits on (41010000):
> >>>>>> BOT ONLINE IM_REP_EN
> >>>>>>
> >>>>>> Unfortunately I got an error this morning :
> >>>>>>
> >>>>>> 01-Feb 03:27 phoenix-sd: Volume "Full-Tape-0001" previously written,
> >>>>>> moving to end of data.
> >>>>>> 01-Feb 03:27 phoenix-sd: canis-job.2007-02-01_03.00.00 Error: Unable
> >>>>>> to position to end of data on device "sony SDX-700C" (/dev/nst0):
> >>>>>> ERR=dev.c:839 ioctl MTEOM error on "sony SDX-700C" (/dev/nst0).
> >>>>>> ERR=Input/output error.
> >>>>>>
> >>>>>> 01-Feb 03:27 phoenix-sd: Marking Volume "Full-Tape-0001" in Error in
> >>>>>> Catalog.
> >>>>>
> >>>>> I'm a little unclear on certain aspects of this ...
> >>>>>
> >>>>> Have you made other backups successfully? Did you try a different
> >>>>> tape? Sometimes tapes ship from the factory with problems. Is this
> >>>>> the same tape that you used for the tests?
> >>>>
> >>>> Yes, it runs fine since one month, and it's the same tape I've used
> >>>> for the tests (after the test I made an mt -f /dev/nst0 rewind ; mt -f
> >>>> /dev/nst0 weof ; mt -f /dev/nst0 rewind ; $> bconsole ; *label).
> >>>>
> >>>> I will try with another tape to see ...
> >>>>
> >>>>> We had a drive go bad on us and the errors that Bacula was spewing
> >>>>> out were the most cryptic things you could imagine. It became
> >>>>> obvious when we visited the datacenter, as the drive had a flashing
> >>>>> error code on the front.
> >>>
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