IBM Netfinity ServeRAID-3H, Инструкция по установке и эксплуатации, Страница: 124 / 212

Adding a Physical Drive:
The ServeRAID adapters and controllers support adding new space
to a disk array in the following scenarios:
Ÿ
You can increase the free space in a disk array without changing
the size of the logical drives. This is useful when you need to
add logical drives to your existing disk arrays. Refer to the
following illustration.
500 MB
1000 MB
2800 MB
Disk 1 Disk 2
Before LDM
Disk 3
500 MB
1000 MB
4950 MB
Disk 1 Disk 2
After LDM
Disk 3 Disk 4
Logical Drive 0
Logical Drive 1
Free Space
Logical Drive 0
Logical Drive 1
Free Space
For example, an existing disk array uses three, 2150 MB hard
disk drives that are configured as two RAID level-5 logical drives
(one 500 MB and 1000 MB) and 2800 MB of free space. If you
use the logical drive migration procedure and add a 2150 MB
hard disk drive to increase the amount of free space, the end
result will be two RAID level-5 logical drives (one 500 MB and
one 1000 MB) and with 4950 MB of free space.
Ÿ
You can increase the size of all the logical drives proportionally
in a disk array. This is useful when you want to increase the
size of the currently defined logical drives. Refer to the following
illustration.
500 MB
1000 MB
2800 MB
Disk 1 Disk 2
Before LDM
Disk 3
750 MB
1500 MB
4200 MB
Disk 1 Disk 2
After LDM
Disk 3 Disk 4
Logical Drive 0
Logical Drive 1
Free Space
Logical Drive 0
Logical Drive 1
Free Space
For example, an array uses three 2150 MB hard disk drives that
are configured as two RAID level-5 logical drives (one 500 MB
You can expand currently defined arrays by adding one to three
new hard disk drives.
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IBM ServeRAID-3H and ServeRAID-3L Adapters