02-25-2007
Irrespective of the storage used it is usually much easier if you use host based mirroring, as this allows you to do backups using the detached mirror of a raid 1, and apply the correct logic for making sure the backup is clean, for example to quiece a database while the mirror is being detached.
RAID5 in hardware would protect you from failure of a disk during the time the mirror is deatached. Personally I find attached fiber storage much easier to work with than SCSI becasue there is no need for example to configure multiple initiators and things like that, also it much easier to configure a multi-pathed configuration.
You could consider doing a mixture of the two, something like 3511 JBODs, with SATA disks and attached them using fiber HBAs, you wouldn't have the RAID 5, but you would have the extra low cost storage. This would also offer you the possibility of moving onto the SAN at a later stage, with much less work.
Last edited by reborg; 02-26-2007 at 10:29 PM..
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