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HP StorageWorks XP Remote Web Console Software User Manual

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SNMP trap are reported. If the used capacity of the pool increases and it exceeds threshold
2 (80%), a SIM and an SNMP trap are reported again.

Figure 5 Pool Capacity (When Pool Threshold 1 Is 50%)

V-VOL thresholds:

The V-VOL threshold is the ratio (%) of the unassigned pool capacity to the unassigned V-VOL
capacity. The threshold can be specified from 5% to 300%.

If the following formula is true, a SIM and an SNMP trap are reported:

Unassigned V-VOL capacity x threshold > unassigned pool capacity

Example: When the V-VOL threshold is 300%

Figure 6 (page 14)

shows the V-VOL capacity and the pool capacity (when the V-VOL threshold

is 300%). When a V-VOL capacity is 1 TB and the assigned capacity is 500 GB, the
unassigned capacity of the V-VOL is 500 GB. Therefore, if free space of the pool is smaller
than 1.5 TB (500 GB x 300%) of the unassigned capacity of the pool, a SIM and an SNMP
trap are reported.

Because a pool is sometimes used by multiple V-VOLs, the pool sometimes requires free space
larger than the unassigned capacity of the V-VOL. So, you can specify the V-VOL threshold
to a value more than 100%.

Figure 6 V-VOL Capacity and Pool Capacity (When V-VOL Threshold Is 300%)

Example 2: When the V-VOL threshold is 90%

Figure 7 (page 15)

shows the V-VOL capacity and the pool capacity (when the V-VOL threshold

is 90%). If free space of the pool is smaller than 450 GB (500 GB x 90%) of the unassigned
capacity of the pool, a SIM and an SNMP trap are reported.

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