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6-2

Chapter 6: Driver installation

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 section “RAID driver

installation” for details.

6.1

RAID configurations

The motherboard comes with the following RAID solutions:

• Adaptec

Adaptec

Adaptec®®®®® HostRAID™

HostRAID™

HostRAID™ technology and

• Adaptec

Adaptec

Adaptec®®®®® AIC-7901X SCSI RAID

AIC-7901X SCSI RAID

AIC-7901X SCSI RAID controller supports SCSI hard disk

drives and RAID 0, 1, and 0+1 configurations.

Refer to the RAID definitions below.

6.1.1

RAID definitions

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 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 0+1

RAID 0+1 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.

RAID 10

RAID 10 is

data stripe configuration with RAID 1 segments whose

segments are RAID 1arrays. This configuration has the same fault tolerance

as RAID1, and has the same overhead for fault-tolerance as mirroring alone.

RAID 10 achieves high input/output rates by striping RAID 1 segments. In

some instances, a RAID 10 configuration can sustain multiple simultaneous

drive failure. A minimum of four hard disk drives is required for this setup.