Clearing Metadata From A Disk Drive; Enabling And Disabling Write-Back Cache - Adaptec DuraStor 7220SS User Manual

Clearing Metadata from a Disk Drive

All member disk drives in an array contain metadata, which is
used to identify array members after a controller is changed or
restarted.
If you have a disk drive that was previously a member of an array,
you can clear its metadata. Disk drives with leftover metadata
display Leftover in the Display Drives window.
Once the metadata has been cleared, you can use the disk drive
again in an array or as a spare.
To clear metadata from a disk drive:
1
From the System Menu, select Utilities Menu and press Enter.
The Utilities menu appears.
2
Select Drive Utilities Menu and press Enter.
The Drive Utilities menu appears.
3
Select Clear Metadata and press Enter.
The Select Drive(s) menu appears showing disk drives that are
not array members.
4
Select the disk drive you want and press Enter.
You can now use this disk drive in an array or as a spare.

Enabling and Disabling Write-back Cache

You can control the write-back cache setting for all of your disk
drives at once. The setting options are:
Don't Modify—Use if you do not want the controller to change
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any disk drive's write-back cache settings.
Enable—Use only if your disk drives are connected to a UPS in
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case of power failure. If the disk drives are not on a UPS and
power is lost, the array will lose any data in the disk's write-
back cache.
Disable (default)—Use if your disk drives are part of an array,
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since the controller is already using write-back cache to improve
performance. Enabling write-back cache on the disk drive may
or may not improve performance in some cases, depending on
the type of array and how you are using it.
Managing Disk Drives and Enclosures
6-3