NEC Express 5800 Series User Manual page 53

Syntax:
<target> add spares=[#:]#:#,[#:]#:#,[#:]#:#–[#:]#:#,...|allunassigned [forced]
<target> remove spares=[#:]#:#,[#:]#:#,[#:]#:#–[#:]#:#,...|all
where <target> is an array (or logical drive, if the array contains only one logical drive). The forced parameter
represses any warning message prompts. If you specify a drive range, any drives in the range that do not
meet the previous criteria are not used.
Example commands:
=> ctrl slot=3 array B add spares=1:6
=> ctrl slot=4 array all add spares=1:5,1:7
=> ctrl slot=5 array A add spares=1:1–1:5
=> ctrl slot=5 array A remove spares=1:1–1:5
Setting the spare activation mode
The spare activation mode feature enables RAID Controller to activate a spare drive under the following
conditions:

Predictive Spare Activation: When a data drive reports a predictive failure (SMART) status

Failure Spare Activation: When a data drive fails. This mode is the default.
In normal operations, RAID Controller starts rebuilding a spare drive only when a data drive fails. With the
predictive failure activation mode, rebuilding can begin before the drive fails, reducing the likelihood of data
loss that could occur if an additional drive fails.
Use the spareactivationmode keyword to toggle the spare activation mode for the controller between drive
failure and drive predictive failure.
Syntax:
<target> modify spareactivationmode=[ failure | predictive ]
Example commands:
controller slot=1 modify spareactivationmode=predictive
controller slot=1 modify spareactivationmode=failure
Spare Management Mode in SSACLI
The sparetype keyword allows you to specify the spare type as "dedicated" (default) or "autoreplace." A
dedicated spare temporarily takes over for a failed drive and can be shared between arrays. An autoreplace
spare replaces a failed drive and cannot be shared between arrays.
Command example:
To add a spare with spare type of autoreplace:
=> ctrl slot=1 array A add spares=1e:1:5 sparetype=autoreplace
Expanding an array
You can increase the storage space on an array by adding physical drives. Any drive that you want to add
must meet the following criteria:

It must be an unassigned drive.

It must be of the same type as existing drives in the array (for example, SATA or SAS).

It must have a capacity no less than that of the smallest drive in the array.
IMPORTANT: An array expansion, logical drive extension, or logical drive migration takes about
15 minutes per gigabyte. While this process is occurring, no other expansion, extension, or
migration can occur simultaneously on the same controller. Controllers that do not support a
battery-backed write cache do not support this process.
SSA CLI 53