AMCC 720-0138-00 manual Unit Names

Controller Settings page

option to start a rebuild manually. It is recommended that you execute a file system check when the rebuild completes. On Mac OS X, you can do this using the First Aid tab in the Disk Utility—select the disk on the left and then click Verify Disk. If verification encounters problems, you can then use the Repair Disk option on the same screen.

Queuing. This policy enables or disables Native Command Queuing (NCQ) for drives in the unit. By default, queuing is disabled. You can enable it, if desired.

NCQ only operates when the feature is enabled at both the drive and the controller. If a drive does not support NCQ, the policy setting for the controller is ignored.

Enabling NCQ can improve performance in many applications; it causes command reordering to be done on the drive itself.

StorSave Profile. You can change the StorSave Profile used for a unit. Three profiles are available: Protection, Balanced, and Performance. These profiles automatically adjust several different factors that affect protection and performance, including whether FUA (Forced Unit Access) is honored, whether Write Journaling is enabled, and whether Disable Cache on Degrade is enabled. For additional information, see “Setting the StorSave Profile for a Unit” on page 48.

Note: If the write cache setting is disabled for a unit, the StorSave Profile capability does not apply and is automatically disabled.

Unit Names

Units can be assigned names. A name can be assigned when the unit is created and can be changed from this screen. For additional information, see “Naming a Unit” on page 43.

Other Controller Settings

Other Controller settings displays information about additional settings, some of which do not apply for the Macintosh.

Auto Rebuild. The Auto Rebuild policy determines how the controller firmware will attempt to rebuild degraded units.

When Auto Rebuild is disabled, only spares will be used to automatically rebuild degraded units. When Auto Rebuild is enabled, the firmware will automatically select drives to use for rebuilding a degraded unit using the following priority order.

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