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Author RAID / LUN Arrangement on SAN
steve

2006-05-09, 1:12 pm

Hi all,

I am in the process of configuring my CX300 SAN & DAE enclosure which will
act as backend storage for (amongst other things) two MS SQL 2005 servers
and a MS Exchange 2003 server. As log files for the above products write to
disk in a sequential manner, they only require RAID1 storage. I have 6 73GB
disks which I was going to configure in the following fashion:

DISK1
RAID1 - SQL Logs on Server1
DISK2


DISK3
RAID1 - SQL Logs on Server2
DISK4


DISK5
RAID1 - Exchange Logs on Server3
DISK6


My question is as follows: As all three products write to disk in a
sequential fashion, would it be worthwhile putting all 6 disks in one big
RAID1 array and giving each server a LUN on the same array to give
flexibility (i.e. LUN size can be changed/redistributed if needed) as
follows:

DISK1
DISK2
DISK3
RAID1 - LUN for SQL1, LUN for SQL2, LUN for Exchange
DISK4
DISK5
DISK6

Thanks & apologies for my poor diagrams!
steve


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