[CentOS] Switching To Raid1

Wed Jan 9 16:55:05 UTC 2008

I have this ASUS M2NBP-VM motherboard http://tinyurl.com/3xby3h
running CentOS 4.4 as a web/email server.  It has a 500Gb SATA2 drive
with about 32Gb in use.

The motherboard supports hardware raid.  Is there a way to switch to
RAID1 without reinstalling or loosing any data?

Also, if I am running raid how do I know if there is a failure on one
of the drives anyway?  Is hardware RAID1 a good idea?

Matt