Read-aheadspecifies that the controller uses read-ahead for the current logical drive.

Adaptive specifies that the controller begins using read-ahead if the two most recent disk accesses occurred in sequential sectors. If all read requests are random, the algorithm reverts to Normal, however, all requests are still evaluated for possible sequential operation.

Cache Policy applies to reads on a specific logical drive. It does not affect the Read-aheadcache.

Cached I/O specifies that all reads are buffered in cache memory.

Direct I/O specifies that reads are not buffered in cache memory. This is the default setting. Direct I/O does not override the cache policy settings. Data is transferred to cache and the host concurrently. If the same data block is read again, it comes from cache memory.

Initializing Logical Drives

You should initialize each new logical drive you configure. You can initialize the logical drives in two ways:

Batch Initialization. The Initialize option on the Management Menu lets you initialize up to eight logical drives simultaneously.

Individual Initialization. The Objects—>Logical Drive action menu for an individual logical drive has an Initialize option.

Batch Initialization

Perform the following steps to initialize more than one logical drive.

1Select Initialize from the Dell Manager Management Menu. A list of the current logical drives appears.

2Press the arrow keys to highlight the drives to be initialized.

3Press the spacebar to select the desired logical drives for initialization or press <F2> to select or deselect all the logical drives.

4After you select the logical drives, press <F10>.

5Select Yes at the confirmation prompt.

Dell Manager

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Dell 3 manual Initializing Logical Drives