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Chapter 6: RAID configurationChapter 6: RAID configuration
Chapter 6: RAID configurationChapter 6: RAID configuration
Chapter 6: RAID configuration
6.1 Setting up RAID
The Intel
®
ICH7R Southbridge chip comes with the
LSI Logic EmbeddedLSI Logic Embedded
LSI Logic EmbeddedLSI Logic Embedded
LSI Logic Embedded
SATA RAID Utility SATA RAID Utility
SATA RAID Utility SATA RAID Utility
SATA RAID Utility and the
IntelIntel
IntelIntel
Intel
®®
®®
®
Matrix Storage Manager Matrix Storage Manager
Matrix Storage Manager Matrix Storage Manager
Matrix Storage Manager. These
utilities support SATA hard disk drives and allow creation of RAID 0, RAID 1,
RAID 0+1, or software RAID 5 (Intel
®
Matrix Storage Manager only)
configuration.
6.1.16.1.1
6.1.16.1.1
6.1.1
RAID definitionsRAID definitions
RAID definitionsRAID definitions
RAID definitions
RAID 0RAID 0
RAID 0RAID 0
RAID 0
(Data striping)
optimizes two identical hard disk drives to read and
write data in parallel, interleaved stacks. Two hard disks perform the same
work as a single drive but at a sustained data transfer rate, double that of a
single disk alone, thus improving data access and storage. Use of two new
identical hard disk drives is required for this setup.
RAID 1RAID 1
RAID 1RAID 1
RAID 1
(Data mirroring)
copies and maintains an identical image of data from
one drive to a second drive. If one drive fails, the disk array management software
directs all applications to the surviving drive as it contains a complete copy of
the data in the other drive. This RAID configuration provides data protection and
increases fault tolerance to the entire system. Use two new drives or use an
existing drive and a new drive for this setup. The new drive must be of the same
size or larger than the existing drive.
RAID 5RAID 5
RAID 5RAID 5
RAID 5 stripes both data and parity information across three or more hard
disk drives. Among the advantages of RAID 5 configuration include better
HDD performance, fault tolerance, and higher storage capacity. The RAID 5
configuration is best suited for transaction processing, relational database
applications, enterprise resource planning, and other business systems. Use
a minimum of three identical hard disk drives for this setup.
RAID 0+1 (RAID 10)RAID 0+1 (RAID 10)
RAID 0+1 (RAID 10)RAID 0+1 (RAID 10)
RAID 0+1 (RAID 10) is
data striping
and
data mirroring
combined without
parity (redundancy data) having to be calculated and written. With the RAID
0+1 configuration you get all the benefits of both RAID 0 and RAID 1
configurations. Use four new hard disk drives or use an existing drive and
three new drives for this setup.
JBODJBOD
JBODJBOD
JBOD
(Spanning)
stands for
Just a Bunch of DisksJust a Bunch of Disks
Just a Bunch of DisksJust a Bunch of Disks
Just a Bunch of Disks and refers to hard
disk drives that are not yet configured as a RAID set. This configuration stores
the same data redundantly on multiple disks that appear as a single disk on
the operating system. Spanning does not deliver any advantage over using
separate disks independently and does not provide fault tolerance or other
RAID performance benefits.
If you want to boot the system from a hard disk drive included in a created
RAID set, copy first the RAID driver from the support CD to a floppy disk
before you install an operating system to the selected hard disk drive.
Refer to Chapter 7 for details.