Resolving Insufficient Pool Capacity - Hitachi VSP G1000 User Manual

Use the following formula to calculate the pool capacity:
Capacity of the pool [MB] =
Total number of pages * 42 - 4200
Use the following formula to calculate the total number of pages:
Total number of pages =
Sigma (floor (floor (pool-VOL number of blocks / 512) / 168))
for each pool-VOL
floor( ): Truncates the value calculated from the formula in parentheses after
the decimal point.
Estimate pool-VOL capacity in multiples of 42 MB. Specifying a pool-VOL
capacity in other multiples less than 42 MB truncates the fraction.
If you install HDP/HDT/HTI Extension in the shared memory, the available
pool capacity per P-VOL is 768 TB, and the total capacity of all pools depends
on the storage system model:
• VSP G200: 3.5 PB (when Extension1 and Extension2 are added to the
shared memory capacity)
• VSP G400, G600, G800 and VSP F400, F600, F800: 6.5 PB (when
Extension1, Extension2, Extension3, and Extension4 are added to the
shared memory capacity)
• VSP G1000 and G1500, and VSP F1500: 12.3 PB
Related references
• Thin Image shared memory requirements

Resolving insufficient pool capacity

Make sure you have sufficient pool capacity. If the pool capacity is
insufficient, the storage system can suspend Thin Image pairs ("PSUE"
status).
Note: When the setting, Suspend TI pairs when depletion threshold is
exceeded, is set to Yes for a DP pool, the status of TI pairs using the pool
might change to PSUE if the depletion threshold is exceeded. When it is set
to No for a TI pool or a DP pool, the status of TI pairs using the pool might
change to PSUE if the pool becomes full.
Procedure
1. Estimate the capacity of snapshot data to be copied to the pool.
If the capacity of snapshot data to be copied to the pool varies hour by
hour, ensure that the largest capacity is your pool capacity.
Hitachi Thin Image User Guide for Hitachi Virtual Storage Platform G Series and F Series
Thin Image system and planning requirements
on page 69
81