Array Configuration Guidelines - NEC Express 5800 Series User Manual

(Optional) To make newly created logical drives available for data storage, use the operating system
3.
disk management tools to create partitions and format the drives.
Linux OS
From any command prompt, enter one of the following:
1.
ssa –local
SSA launches in a browser window.
For a list of options, enter the following:
2.
ssa –h

Array configuration guidelines

Remember the following factors when you build an array:

All drives grouped in a logical drive must be of the same type (for example, either all SAS or all SATA and
either all hard drives or all solid state drives).

For the most efficient use of drive space, all drives within an array should have approximately the same
capacity. Each configuration utility treats every physical drive in an array as if it has the same capacity
as the smallest drive in the array. Any excess capacity of a particular drive cannot be used in the array
and is unavailable for data storage.

The more physical drives configured in an array, the greater the probability that the array will experience
a drive failure during any given period.

To guard against the data loss that occurs when a drive fails, configure all logical drives in an array with
a suitable fault-tolerance (RAID) method.
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