HP 2000fc Reference Manual page 111

To set a snap pool's policies and thresholds:
1. Select Manage > Volume Management > Snapshot Services > Set Snap-Pool Policy.
For each virtual disk, the virtual disk panel shows a status icon; the name, RAID
level, size, number of disk drives, and number of volumes; and utility status, if any.
2. Select a virtual disk.
The selected virtual disk's volume names, sizes, and types are displayed, and the
amount of free space.
3. Select the snap pool to configure.
4. Set the Warning Policy threshold.
When the snap pool reaches the specified percent of capacity, the system generates
an event that the threshold has been reached. Notify Only is the only Warning
Policy. The default is 75%. The Warning threshold must be less than the Error
threshold.
5. Select an Error Policy and set the threshold to a value less than 99%.
When the snap pool reaches the specified percent of capacity, the system generates
an event that the threshold has been reached. The default is 90%. The Error
threshold must be less than the Critical threshold of 99%.
The system takes further action, depending on the Error Policy, as follows:
Delete Snapshots – Automatically deletes all snapshots associated with the snap
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pool.
Auto Expand – Expands the snap pool by the value specified in the Size To
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Expand (MBytes) field. The amount of space specified must exist as free space
on the virtual disk on which the snap pool resides. If there isn't enough space on
the virtual disk, the auto-expand operation fails, and an insufficient virtual disk
free space error is logged.
Halt Writes – Halts all writes to the master volume (each write returns an error).
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Snapshot data is preserved.
Delete Oldest Snapshots – Deletes the oldest snapshots until the amount of data
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in the snap pool is below the threshold. This option is the default.
Notify Only – No further action.
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6. Select a Critical Policy.
When the snap pool reaches 99% capacity, the system takes action depending on the
Critical Policy, as follows:
Delete Snapshots – Automatically deletes all snapshots associated with the snap
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pool. This option is the default.
Chapter 3 Managing Storage 111