Adaptec GDTSETUP User Manual download pdf (Page 64)

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According to the ad-

justed stripe size (e.g.,

16 KB) and the number

of hard disks, the data

blocks are split into

stripes. Each stripe is

stored on a separate

hard disk. Especially

with sequential read

and write operations,

we can observe a sig-

nificant improvement of

the data throughput.

RAID 0 includes no redundancy at all, i.e., when one hard disk fails, all data is lost.

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All data is stored twice on two identical hard disks. When one hard disk fails, all data are

immediately available on the other without any impact on the performance and data integ-

rity.

We talk about "Disk Mir-

roring" when two hard

disks are mirrored on one

SCSI channel. If each

hard disk is connected

with a separate SCSI

channel, this is called

"Disk Duplexing"

(additional security).

RAID 1 represents an easy

and highly efficient solu-

tion for data security and

system availability. It is

especially suitable for installations which are not too large (the capacity available is only

half of the installed capacity).

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Adaptec GDTSETUP User Manual Page 64