HP ML330 - ProLiant - G3 Setup And Installation Manual page 91

RAID Configuration and Management
RAID 1 (Mirror)
RAID 1 is a RAID level that involves duplicating all data from one drive to a second
drive (mirroring). RAID 1 provides complete data redundancy, but at the cost of
doubling the required data storage capacity. You must have a minimum of two hard
drives to support RAID 1.
RAID 1+0
RAID 1+0 (also known as RAID 10) is a RAID level that provides both striping and
mirroring capabilities. RAID 1+0 mirrors data from one drive to another and then
stripes the data across a second set of drives. You must have four hard drives to
support RAID 1+0 on the server.
RAID 5
RAID 5 is not supported by the ProLiant ML330 Generation 3 server or the
Integrated ATA RAID Configuration Utility. This RAID level stripes data and parity
information across drives and requires a minimum of three hard drives.
Spare
The spare option in the utility assigns an extra, unused drive as a spare to be used in
case of a drive failure. The spare drive will not be used during normal system
operation, and provides no additional storage capacity. A pre-configured spare hard
drive is brought into service only in the case of a RAID 1 failure.
IMPORTANT: The spare option is applicable only in RAID 1 for the server. If a spare is not
available, the failed drive must be replaced with a new drive so that the data on the failed drive
can be rebuilt. The replacement drive capacity must be greater than or equal to the failed drive
it replaces.
6-2 HP ProLiant ML330 Generation 3 Server Setup and Installation Guide