IBM System Storage DS3000, Programming Manual

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Notes
Each disk pool name must be unique. You can use any combination of alphanumeric characters,
underscore (_), hyphen(-), and pound (#) for the user label. User labels can have a maximum of 30
characters.
You can specify an arbitrary set of disk pools. If you select multiple disk pools, setting a value for the
userLabel parameter causes an error.
If you do not specify a value for an optional parameter, a default value is assigned.
Disk Pool Alert Thresholds
Each disk pool has two progressively severe levels of alerts to inform users when the storage capacity of
the disk pool is approaching full. The threshold for an alert is a percent of the used capacity to the total
usable capacity in the disk pool. The alerts are:
v Warning
– This is the first level of alert that the used capacity in a disk pool is approaching full. When
the threshold for the warning alert is reached a Needs Attention condition is generated and an event is
posted to the storage management software. The warning threshold is superseded by the critical
threshold. The default warning threshold is 50 percent.
v Critical
– This is the most severe level of alert that the used capacity in a disk pool is approaching
full. When the threshold for the
critical
alert is reached a
Needs Attention
condition is generated,
and an event is posted to the storage management software. The
warning
threshold is superseded by
the
critical
threshold. The default
critical
warning threshold is 85 percent.
To be effective, the value for a warning alert must always be less than the value for a critical alert. If the
value for the warning alert is the same as the value for a critical alert, only the critical alert is sent.
Disk Pool Background Operations
Disk pools support these background operations:
v
Reconstruction
v Instant Availability Format (IAF)
v
Format
v Dynamic Capacity Expansion (DCE)
v
Dynamic Volume Expansion (DVE) (For disk pools, DVE is actually not a background operation, but
DVE is supported as a synchronous operation.)
Disk pools do not queue background commands. You can start several background commands
sequentially, but starting more than one background operation at a time delays the completion of
commands that you started previously. The relative priority levels for the supported background
operations are:
1. Reconstruction
2. Format
3. IAF
4. DCE
Set Disk Pool (Modify Disk Pool)
This command adds capacity to a disk pool or changes the controller ownership for the entire disk pool.
These two operations are mutually exclusive.
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IBM System Storage DS3000, DS4000, and DS5000: Command Line Interface and Script Commands Programming Guide