Hi all,
We are running a FreeBSD server with 7.3-RELEASE and
bacula-server-5.0.3 with a scalar50 array with 2 HP LTO4 drives (Fibre
Channel). Some days ago we saw the following in our kernel log:
May 9 22:06:46 kernel: isp0: Chan 0 Abort Cmd for N-Port 0x0000 @ Port
0x000001 0xffffff0005b66c00
May 9 22:06:46 kernel: (sa0:isp0:0:0:0): Command Aborted
while bacula complained that:
09-May 21:03 JobId 9334: Writing spooled data to Volume. Despooling
128,849,065,439 bytes ...
09-May 22:06 JobId 9334: Error: block.c:577 Write error at 56:60340 on device
"Drive-1" (/dev/nsa0). ERR=Operation not permitted.
09-May 22:06 JobId 9334: Re-read of last block succeeded.
09-May 22:06 JobId 9334: End of medium on Volume "ACG510L4"
Bytes=301,913,385,984 Blocks=4,679,956 at 09-May-2011 22:06.
09-May 22:06 JobId 9334: 3307 Issuing autochanger "unload slot 31, drive 0"
command.
Well, I think it is clear that this is definitely not bacula's fault but
rather the tape's or the tape drive's but I was wondering whether the
data in the tape is intact. So I tried to:
bls -j -v -L -V ACG510L4 Drive-2
(I loaded the tape on Drive-2 on purpose so that I wouldn't be using
Drive-1)
which said after a while that:
17-May 15:53 bls JobId 0: End of Volume at file 57 on device "Drive-2"
(/dev/nsa1), Volume "ACG510L4"
17-May 15:53 bls JobId 0: End of all volumes.
I don't know how thorough bls is, but in any case no errors were
reported. The catalog has the ACG510L4 tape listed as having files 0 to
56, which I think is consistent with the bls output.
Unfortunately, although the tape is an LTO4 one it was marked as full at
only about ~300Gb. These tapes can typically take 1 to 1.5 Tb each, so
this is not normal. So here are the questions:
1.The tape Drive-1 reports errors like:
Drive TapeAlert History
Drive Serial Number HU191254G4
Last Unload Time 201105171331
Read warning Current State = 0 Count = 1
Write protect Current State = 0 Count = 5
Cleaning media Current State = 1 Count = 1
Memory chip in cartridge failure Current State = 0 Count = 9
Tape directory invalid at unload Current State = 0 Count = 1
Should I just clean the drive (as seen here) or should I look into the
possibility
of a hw failure? Is it possible to encounter an error while writing that
can be attributed to an unclean drive?
2.The tape itself does not appear to be damaged, is there a way to mark
it appendable (from full that it is now) and use the rest of it? Is
marking the tape appendable allowed after it has been marked full?
3.Any general remarks from anyone having experienced similar problems
would of course be most welcome.
Best Regards to all,
--
Athanasios Douitsis,
National Technical University of Athens NOC
e: aduitsis AT noc.ntua DOT gr | t: +30-210-772-2409
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