Adaptec DuraStor 7220SS User Manual page 53

With Dynamic Spares enabled, if you have spares or available
drives, the controller first looks for a dedicated or spare pool drive
for the reconstruction. If none is found, it uses an available drive,
which it automatically assigns as a spare and starts reconstruction.
You must ensure that the new or available drive is large enough to
replace the smallest member in the array and does not contain
metadata. See Clearing Metadata from a Disk Drive on page
Note: Performance in systems without a SAF-TE Enclosure
Processor (SEP) will decrease if an array becomes critical
with this option enabled and there are no available drives
for a reconstruction. Minimize the performance impact by
increasing the rescan rate.
To enable dynamic spares:
1
From the System Menu, select Configuration Menu and press
Enter.
The Configuration menu appears.
2
Select Option Configuration and press Enter.
The Option Configuration menu appears.
3
Select Dynamic Spare Configuration and press Enter.
The Dynamic Spare Config menu appears. The current setting is
marked by an *.
4
Select Enabled and press Enter.
The Rescan Rate prompt appears.
5
Enter the rescan rate in minutes.
The rescan rate tells the controller how often to look for an
available drive by rescanning the bus. Remember that
rescanning the bus frequently can affect performance. If you
have an SEP, the dynamic spare configuration will not rescan
the bus—the SEP will detect the new drive and tell the controller
to rescan; the rescan rate you set here will not affect the system.
The system confirms the change.
6
Select Yes and press Enter.
Managing Spares
6-3.
4-4