Asus PCI-DA2100 User Manual page 17

1
3
Logical Drive 0
The ASUS PCI-DA2100/-DA2200 RAID controller provides both
Local Spare Drive and Global Spare Drive functions. On certain
occasions, applying these two functions together will better fit
various needs. Take note though that the Local Spare Drive always
has higher priority than the Global Spare Drive.
In the example shown on the next page, the member drives in Logical
Drive 0 are 9 GB drives, and the members in Logical Drives 1 and 2
are all 4 GB drives. It is not possible for the 4 GB Global Spare Drive
to join Logical Drive 0 because of its insufficient capacity. However
using a 9GB drive as the Global Spare drive for a failed drive that
comes from Logical Drive 1 or 2 will bring huge amount of excess
capacity since these logical drives require 4 GB only. In the settings
below, the 9 GB Local Spare Drive will aid Logical Drive 0 once a
drive in this logical drive failed. If the failed drive is in Logical Drive
1 or 2, the 4 GB Global Spare drive will immediately give aid to the
failed drive.
ASUS PCI-DA2100/PCI-DA2200 User's Manual
Global Spare Drive
GS
X
2 1
GS
Logical Drive 1
When a member drive from any
logical drive fails, the Global Spare
Drive joins that logical drive and
automatically starts to rebuild.
2 1
Global
4
Spare
Drive
Logical Drive 2
2
3
3
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