logical drives > advanced settings
Note: Not all options
are available for all RAID levels.
Use the Advanced settings in the Configuration wizard to tune
your logical drive configuration for optimal performance. You can set the following
- Write cache - Determines how data is stored in the controller's
cache memory. You can choose from two available settings: write-through
- stripe-unit size - Determines the amount of data, in kilobytes
(KB), written to one segment of a logical drive
before the next segment is used for subsequent data. Depending on the controller, you can choose a stripe-unit
size from 16 KB to 1024 KB.
- The default stripe size usually provides the best performance for typical applications.
- To change the stripe size of an existing logical drive, you must expand or migrate the logical drive.
- For RAID Level-6 and Level-60 logical drives,
the number of choices for stripe-unit size decreases as the number of disks in the logical drive increases.
- Read cache - Enables and disables read caching. When read-caching
is enabled, the controller monitors read access to the logical drive. If it
detects a pattern, it pre-loads the cache with the data that seems most likely
to be read next. The default is Enabled.
- Initialize method - Determines the method used to initialize
the logical drive. You can choose from three available methods:
- Auto-synchronization - For RAID Level-1 logical drives,
copies the data from the primary drive to the mirror drive. For RAID Level-5
logical drives, computes and writes the correct parity for the entire
can be a lengthy operation. The ServeRAID Manager performs this task in
the background. However, you cannot use the logical drive until the task
- Clear - removes pre-existing data by overwriting every
block in the logical drive. This method is faster than auto-synchronization
but the logical drive is not available immediately.
controllers, the ServeRAID Manager supports the Clear initialization method
- Quick - makes the logical drive available immediately.
It is the fastest method but should be used only for new physical
- Initialize priority - Adjusts the priority of the initialization
task. The default is High: initialize the logical drive as fast as possible.
When you are ready to continue, click Next. The "Configuration
summary" window opens.