Tony,
Like Craig, I think more details would be helpful. Assuming Native FC on
7.5 you might need:
MPEMXK4(A) GS - FibreChannel cards cause performance issue when
disconnected from SAN
Recommend latest GR patches:
MPEMXW2(A) GR - SA5414 while running FCSCAN in a loop
MPEMXW4(A) GR - Running FCSCAN > 32000 times can cause System Abort
Jim
-----Original Message-----
From: HP-3000 Systems Discussion [mailto:[log in to unmask]] On
Behalf Of Tony Summers
Sent: Friday, June 01, 2007 4:17 AM
To: [log in to unmask]
Subject: [HP3000-L] New SAN affecting our production HP3000
Although the jury is still out as to the real reason, we've been having
performance problems on our production HP3000 immediately after a new
SAN was connected to the network. (The SAN is currently being
commissioned as part of our general server consolidation, but is not
used by the HP which has its own private VA).
We're planning to run some controlled experiments over the next few days
(turning the SAN on and off and comparing results) but has anyone else
experienced something simliar where an HP3000 seems to suffer as a
result of unrelated kit being added to the network ?
For reference, HP are looking at the VA's logfiles, and we also
suffered a disk problem on the VA which was swapped out in the same
period. For that reason, we still don't know for sure whether the SAN
can be blamed or whether disc mirroring on the HP3000's VA was simply
taking some time to catch up.
However, when we turned the SAN off last night, then the HP's
performance returned to normal. I doubt it's co-incidence - but I
would like to be proved wrong.
Regards
Tony Summers.
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