I know this does not answer your questions, but FYI: In case you need to do data recovery on a failed raid, there is a software called R-Studio. You can hook all of the raid hard drives to a computer in a JBOD mode and the software can emulate the RAID so it can restore and recover data from failed hard drives and RAIDs. Keith Keith Sirmons Microcomputer/LAN Administrator College of Veterinary Medicine >>> bijumon@xxxxxxxxxxxxxxxx 8/4/2005 11:21:52 AM >>> Hii friends!! A quick question.. On a server (RAID1,mirroring), if RAID card fails, when i replace it,can save the HDD data? or is it mandatory to blank them,and how do i restore the HDD? any idea like ghost etc.. Thanx biju