Adaptec AAA-UDMA Hardware Guide - Page 29

Creating an Array With the ARRAYCONFIG UDMA Utility

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Creating an Array With the ARRAYCONFIG UDMA Utility 1 Insert the ARRAYCONFIG UDMA diskette into drive A and reboot the system. Wait for ARRAYCONFIG UDMA to start automatically. 2 Read the text that appears on the initial screens. Press any key to view the next screen, or press Esc to return to the previous screen. 3 Select Express Setup from the Setup Type Selection menu. 4 When the next screen appears, select the type of array you want to create: - Select Optimized for Performance (RAID 0) if you want the fastest possible data input and output from the new array. This kind of array does not have data protection features, however. When prompted, type the number of disks you want in this array. - Select Optimized for Data Protection (RAID 1) if your main concern is to protect the files on the array from disk failure. This kind of array safeguards files in the array even if one of the array disks fails. (This kind of array has two disks by definition, so you will not be prompted to enter the number of disks you want in the array.) - Select Performance and Data Protection with Parity (RAID 5) if you want fast performance and data protection, and you have three or more disks available for the array. This kind of array contains redundant (parity) data distributed across all disks in the array. If any one disk fails, data can be reconstructed from the parity information. If a second disk fails before the array has been reconstructed, all data is lost. The actual usable data capacity of the array is equal to one less than the total number of disks. (One disk worth of capacity is needed to hold the parity information.) - Select Performance and Data Protection with Mirroring (RAID 0/1) if you want fast performance and data protection, and have an even number of disks available for the array. This kind of array stripes and mirrors data on two or more pairs of disks. If one disk in a pair fails, data is available. The actual data capacity of the array equals half the total available disk space. 3-3

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3-3
Creating an Array With the ARRAYCONFIG UDMA Utility
1
Insert the
ARRAYCONFIG UDMA
diskette into drive
A
and
reboot the system. Wait for
ARRAYCONFIG UDMA
to start
automatically.
2
Read the text that appears on the initial screens. Press any key
to view the next screen, or press
Esc
to return to the previous
screen.
3
Select
E
xpress Setup
from the Setup Type Selection menu
.
4
When the next screen appears, select the type of array you
want to create:
–
Select
Optimized for P
erformance (RAID 0)
if you want
the fastest possible data input and output from the new
array. This kind of array does not have data protection fea-
tures, however. When prompted, type the number of disks
you want in this array.
–
Select
Optimized for D
ata Protection (RAID 1)
if your
main concern is to protect the files on the array from disk
failure. This kind of array safeguards files in the array even
if one of the array disks fails. (This kind of array has two
disks by definition, so you will
not
be prompted to enter
the number of disks you want in the array.)
–
Select
Performance and Data Protection with Par
ity
(RAID 5)
if you want fast performance and data protection,
and you have three or more disks available for the array.
This kind of array contains redundant (parity) data distrib-
uted across all disks in the array. If any one disk fails, data
can be reconstructed from the parity information. If a second
disk fails before the array has been reconstructed, all data is
lost. The actual usable data capacity of the array is equal to
one less than the total number of disks. (One disk worth of
capacity is needed to hold the parity information.)
–
Select
Performance and Data Protection with M
irroring
(RAID 0/1)
if you want fast performance and data protec-
tion, and have an even number of disks available for the
array. This kind of array stripes and mirrors data on two or
more pairs of disks. If one disk in a pair fails, data is avail-
able. The actual data capacity of the array equals half the
total available disk space.