Re: Disck write latency > 50ms
- From: "Neil Hobson [MVP]" <neil.hobson@xxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 22 Feb 2006 10:21:56 -0000
RAID5 probably isn't the best answer. Are you using MOM to monitor this
server? Is it actually causing a problem to the users? In a nutshell, you
should look to size your server correctly regarding disk IOPS. There are a
number of articles on doing this, such as those by Rui Silva at
msexchange.org, or Microsoft's own paper called something like Optimizing
Storage for Exchange 2003.
--
Neil Hobson
Exchange MVP
"SW" <SW@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:582F4999-F46F-4DAA-9B59-E60B3227B368@xxxxxxxxxxxxxxxx
What can we do about disk latency that goes over 5ms at various time of
the
day?
We have an Exchange 2030 Ent server (400 users), 2 DB's 80gb and 10GB.
The high latency is on our F drive, he is our setup:
c: OS, Exchange program, paging file (RAID 1 channel 0)
e: Transaction logs (RAID 1 channel 1)
f: Databases (RAID 5 on a separate RAID card)
Usually the server runs below 20ms on the Avg. Disk sec/write what we hit
50ms at stages throughout the day, especially first thing when everyonein.
logs
.
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