I was having a discussion with my DBA about how we are going to split the Exchange 2007 Databases.
To give you an idea, we are going from one 500GB store (a Testament to Exchange 2003 I gotta say!)
into 4-5 Storage Groups with 4 Databases a piece in all likelyhood. There are about 300-400 user mailboxes.
We have 12 300 GB 15K SAS drives in an MSA Array.. so the RAID 10 Storage total is 1.8 Terrabytes.
We are between three configs:
A)All 12 drives into one RAID10 array, giving us 1.8TB and splitting the space into individual partitions for 2-3 databases to each partition.
B)2 6 Drive RAID10 arrays giving us 900GB each, and 2-3 databases per partition, with 3 partitions of 300GB
C) 3 4 Drive RAID 10 arrays giving us 600GB each, and 2 partitions with 2-3 databases each.
Which config would give us the best performance? We are going to have heavy stores with light ones to try and balance the load.
What is the most databases you would recommend having transaction logs on a mirror array? Would 3-4 sets of Transaction Logs be OK for each one?
In any event, it's going to be much faster than the RAID 5 everything is sharing right now.