[THIN] OT - MSCS quorum disks on a SAN
- From: "Lee, David (CITY TREASURY)" <David.Lee@xxxxxxxxxxxxxxx>
- To: "Thin client listserve (E-mail)" <thin@xxxxxxxxxxxxx>
- Date: Fri, 27 Jun 2003 14:46:10 +0100
Judging by recent posts there are obviously quite a few people with a lot of
MSCS and SAN experience on the list.....can anyone help with a question
about dividing up disks in this environment?
We currently have a project underway to implement some major new SQL
applications, upgrade Exchange and replace multiple old Novell file servers,
hence have been talking to various SAN suppliers and have got to the stage
where we are receiving quotes and specifications. It has been determined
that at least three Windows 2000 MSCS clusters will be required to support
these services, with a possible later expansion for other applications. The
leading supplier has quoted for a SAN with around 2Tb 'raw' storage, but
obviously a chunk of this will not be useable due to meeting the
requirements of RAID, hot spares etc.
I have been told that standard practice is to assign most of the SAN disks
to a RAID 5 array, which would be divided up into LUNs which will be
assigned to the respective servers. However, I have also been told that
Microsoft recommend the quorum drive of a cluster sit on a dedicated
mirrored pair of disks, rather than assigning a LUN from this main RAID 5
array. Obviously, with three clusters this would knock a further six disks
off the usable storage space. However, the supplier has suggested to reduce
cost that a single mirrored pair of disks could be partitioned to hold the
quorums for all three clusters, which seems to me like too many eggs in one
basket, mirrored or not!
Sorry for the long winded explanation, I guess I can summarise by saying I'm
really just trying to establish what is standard practice out there for
implementing multiple MSCS cluster quorum disks on a SAN - any thoughts or
ideas appreciated.
Thanks in advance
David Lee
Systems Engineer
City Treasury
Plymouth City Council
Civic Centre
PL1 2AA
Tel: (01752) - 304218
DISCLAIMER
"The views expressed in this message are personal and must not be considered
to be the official views of Plymouth City Council."
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