Hello John,
Could you please provide us with more details : TSM server level, OS it's
running on.
Thanks
Norman



John C Dury <jdury AT DUQLIGHT DOT COM>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
03/04/2008 00:00
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Subject
[ADSM-L] multiple tapes being detected as WRITE PROTECTED in SL500 library






We have an SL500 tape library with 50 tapes in it and 4 IBM Ultrium LTO4
drives. One of the drives consistently is detecting tapes that get mounted
to it as WRITE PROTECTED. We have replaced the fiber between the drive and
the DS-4900 SAN switch and also moved it into a new port in the SAN switch
in case the GBIC was causing the problem.
This all started with the same drive getting multiple MEDIA FAULT errors
on
the same LTO4 drive and marking tapes as READ ONLY. Sun/STK has since
replaced the same drive and now the drive in the same slot on the SL500 is
getting the WRITE PROTECTED errors on the tapes that are mounted in it.

Could it be the new drive has a bad sensor in it? I'm just not sure what
else we can replace at this point to fix this. And if that is the case,
are
these drives (IBM Ultrium) really that unreliable and get errors this
often? Or could it be something with the SL500? This is a new tape library
with new drives that is only a few months old. This is our production
system and having it mark 10-12 tapes a night as unavailable is quite a
pain when we only have 50 tapes in the whole library.
Thanks,
John