Take the tour ×  I'm in the process of setting up a server. Dell
PE R510, 6 450GB HD. It came with all drives RAID 5'd, I'm
wanting to wipe the configuration and set 0 and 1 as RAID 1,
then 2-5 as RAID 5. When I go to setup RAID 1, it's asking me
about which Caching Policy to use - Read/Write, Write only, Read
only, and none. I'm not sure which to pick here...suggestions?
This server will be used for Exchange 2010 and the RAID 1 drives
will be used for the OS and Logs, and the server will be on a
battery backup. Thanks in advance.  share|improve this question
does your raid card have a battery backup? If not read only; If
so your call on read only or read/write –  Lamar B Dec 7 '11 at
23:22 add comment  1 Answer  up vote 3 down vote accepted  The
RAID write cache policy should be set depending on the disk I/O
load. You must make sure that you have a battery on the RAID
controller and that the battery is functional.  The cache policy
settings can be changed at any time from Dell OMSA.  I suggest
to start with