Toshiba Magnia Z500 - Manual (Page 122)

Installing and Removing Hardware
Hard Disk Drive (HDD) –IDE HDD–
103
NOTE: If the server uses IDE RAID for redundancy, the oper-
ation is continued by a spare device without stopping the sys-
tem, even if one of the hard disk drives that configure a disk
array fails (downgraded operation). However, if another
device fails, it may destroy and lose important programs or
data. Replace the faulty device by a normal one as quickly as
possible, and recover the disk array.