Asus PCI-DA2100 User Manual page 29

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.
2
Copy and Replace each member drive. After all the
member drives have been replaced, execute the
"RAID Expansion" to use the additional capacity.
ASUS PCI-DA2100/PCI-DA2200 User's Manual
RAID Expansion - Mode 2
2 GB 2 GB 2 GB
RAID 5 (4GB)
2 GB
1
RAID 5 (4GB)
RAID Expansion - Mode 2
2 GB 2 GB 4 GB
RAID 5 (4GB)
Copy and Replace the other member drives one by one
until all the member drives have been replaced
The original logical drive
4 GB
2 GB 2 GB
one of the member drives
4 GB
New
Drive
(1/3)
New
Drive
Copy and Replace
In use
Unused
(2/3)
In use
Unused
3
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