ADSM-L

AW: virtual write error on Raid-1

2003-08-06 08:45:04
Subject: AW: virtual write error on Raid-1
From: Salak Juraj <j.salak AT ASAMER DOT AT>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 6 Aug 2003 14:10:09 +0200
This is an idea to try - I will do it.
In a couple of weeks I will tell back if it could help to
localise the problem.

You seem to have experiences with CRCD:  
I assume CRC errors will both be reported in ACTLOG
and cause I/O in trouble to be automatically repeated,
is both true?

best regards
Juraj



-----Ursprüngliche Nachricht-----
Von: Zlatko Krastev [mailto:acit AT ATTGLOBAL DOT NET]
Gesendet: Mittwoch, 06. August 2003 12:16
An: ADSM-L AT VM.MARIST DOT EDU
Betreff: Re: virtual write error on Raid-1


Juraj,

have you tried `upd stg RECLAIMTPDB crcd=y`? It also might be worth to
enable it for few days on tape pool as well.
Note: it might slow down your operations and LTO is sensitive to this!

Zlatko Krastev
IT Consultant






Salak Juraj <j.salak AT ASAMER DOT AT>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
06.08.2003 12:29
Please respond to "ADSM: Dist Stor Manager"


        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        virtual write error on Raid-1


Hello all,

anyone has seen before?

TSM Server reports sometiems write error on a disk raid-1 volume,
while
neither an evidence about an error is elsewhere (Raid-Controller, event
log)
nor I am able to provoke an write error wit a test program.

This problem occures sometimes, but not always,
when an reclamation process reclaimss an LTO tape to a disk volume
defined in

2003.08.05 11:41:50      ANR1340I Scratch volume
V:\TSM\RECLAIMPOOL1\00000DAA.BFS
                          is now defined in storage pool RECLAIMTPDB.
2003.08.05 11:47:11      ANR9999D pvrfil64.c(1056): ThreadId<30> Error
writing FILE
                          volume V:\TSM\RECLAIMPOOL1\00000DAA.BFS.
2003.08.05 11:47:11      ANR1411W Access mode for volume
                          V:\TSM\RECLAIMPOOL1\00000DAA.BFS now set to
"read-only"
                          due to write error.



TSM 5.1.7.0 on W2K SP3
IBM 345 with two Raid 4m controller, RAID-1 Disks

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