Asus PCI-DA2200 User Manual page 32

RAID 5 Logical Drive - 4GB
RAID
Expansion
In the figure above, new drives are added to increase the capacity of
a 4-Gigabyte RAID 5 logical drive. The two new drives increase the
capacity to 8 Gigabytes.
Mode 2 Expansion, on the other hand, requires the same number of
higher-capacity SCSI hard disk drives for a given logical drive.
Copy and Replace each of the member drives. Even
if one member drives fails during the Copy and
Replace, the logical drive will still be available for
access.
The figure above illustrates expansion of the same 4-Gigabyte RAID 5
logical drive using Mode 2 Expansion. Drives are copied and
replaced, one by one, onto three higher-capacity drives.
3-22
RAID Expansion - Mode 1
2GB
2GB
2GB
2GB
RAID Expansion - Mode 2
2 GB 2 GB 2 GB
RAID 5 (4GB)
2 GB
1
RAID 5 (4GB)
2GB
+
Add-in New Drives
2GB
2GB
RAID 5 Logical Drive - 8GB
The original logical drive
4 GB
2 GB 2 GB
New
Drive
one of the member drives
ASUS PCI-DA2200 User's Manual
2GB
+
2GB
2GB
(1/3)
Copy and Replace
In use
Unused