Raid Terminology - HP DL320 - ProLiant - G3 Setup And Installation Manual

RAID Configuration and Management

RAID Terminology

IMPORTANT: Only RAID levels 0 and 1 are supported by the Integrated ATA RAID
Configuration Utility.
RAID 0 (Stripe)
RAID 0 is a RAID level that involves breaking up data into smaller blocks and then
writing a block to each drive in the array (striping). RAID 0 does not provide any
data redundancy, but does offer the best performance of any RAID level.
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. A minimum of two hard drives are
required to support RAID 1.
RAID 1+0
RAID 1+0 is not supported by the ProLiant DL320 Generation 2 server or the
Integrated ATA RAID Configuration Utility. 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. Four hard drives are required to support RAID 1+0 on the server.
RAID 5
RAID 5 is not supported by the ProLiant DL320 Generation 2 server or the
Integrated ATA RAID Configuration Utility. It is a RAID level that stripes data and
parity information across drives and requires a minimum of three hard drives.
6-2 HP ProLiant DL320 Generation 2 Server Setup and Installation Guide