wrote:
On several occasions I have seen situations where faulty UPS's caused
servers wtih RAID 5 arrays to reboot continuosly which caused
corruption to either the RAID array itself or the file system. I am
considering recommending RAID1 whenever possible because I suspect
that it would be more resillient under the same conditions because I
have two seperate copies of the system and I do not suspect that
mirroring would mirror NTFS corruption or suffer from the problems of
RAID 5 array corruption. I would like to hear your opinions on this.

Mirroring would most certainly copy any NTFS level corruption. By the
time it gets to the controller it's just blocks of data. The controller
has no way of knowing that the data has been corrupted in the file
system layer, and will faithfully replicate the corrupt data to both
halves of the mirror.



--
Nik Simpson