V-VOL requirements

Provisioning Guide for VSP One Block

Version
10.2.x
Audience
anonymous
Part Number
MK-23VSP1B012-00
Items Requirements
Volume type V-VOL

The LDEV number is handled.

Maximum number of V-VOLs

For DP-VOLs with capacity saving enabled, see the Maximum number of DRD-VOLs and the Maximum number of DRD-VOLs with dedupe and compression tables following this table.

Volume capacity 46.87 MB to 256 TB for each volume (8 GB to 256 TB for V-VOLs with the data direct mapping attribute)
  • When TB is specified: 0.01 TB to 256 TB including V-VOLs with the data direct mapping attribute.
  • When GB is specified: 0.04 GB to 262,144 (8 GB to 262,144 GB for V-VOLs with the data direct mapping attribute)
  • When MB is specified: 46.87 to 268,435,456 MB (8,192 MB to 268,435,456 MB for V-VOLs with the data direct mapping attribute)
  • When block is specified: 96,000 blocks to 549,755,813,888 blocks (16,777,216 blocs to 549,755,813,888 blocks for V-VOLs with the data direct mapping attribute)

See the subsequent tables for the total maximum volume capacity for each storage system.

However, if DP-VOLs of the capacity saving function are enabled and are associated with a pool, then the maximum volume capacity is the value which is deducted from the total capacity (10% of the total capacity of DP-VOLs before the capacity saving).

Path definition Available
LDEV format

Available.

System option mode (SOM) 867 ON: When you format an LDEV on a V-VOL, the capacity mapped to the V-VOL is released to the pool as free space.

When you format a V-VOL, the storage system releases the allocated page area in the V-VOL. If the LDEV format is applied to V-VOLs that are enabled for full allocation, the used capacity of the pool is not changed before the LDEV format is applied.

Note: If a pool is deleted or shrunk without restoring an error in the drive to which a DDP group belongs (while there is backup data in the spare area), the LDEV belonging to the DDP group cannot be formatted. Delete the DDP group to which the LDEV to be formatted belongs, retry the creation of the DDP group and the LDEV, and then format the target LDEV.

The following tables show the maximum numbers of virtual volumes for which the capacity saving feature setting is enabled. Depending on your configuration, the maximum number of cache management devices might be reached, and you might not be able to create virtual volumes up to the stated maximum number. For information on how to calculate the number of virtual volumes that can be created, see Cache management device requirements.

Maximum number of DRS-VOLs

Storage system Capacity saving setting Maximum number per pool Maximum number of per system
VSP One B24 Deduplication and Compression 16,375 16,375
Compression 16,383 16,383
VSP One B26 Deduplication and Compression 21,753 21,753
Compression 21,759 21,759
VSP One B28 Deduplication and Compression 21,753 21,753
Compression 21,759 21,759

Maximum number of DRD-VOLs with dedupe and compression

Storage system Capacity saving setting Maximum numbers per pool Maximum number per system
VSP One B24 Deduplication and Compression 16,375 16,375
Compression 16,383 16,383
VSP One B26 Deduplication and Compression 32,629 32,629
Compression 32,639 32,639
VSP One B28 Deduplication and Compression 32,629 32,629
Compression 32,639 32,639

Maximum number of DRS-VOLs or DRD-VOLs with dedupe and compression

Storage system Additional shared memory Maximum total capacity (PB) of virtual volumes with capacity saving enabled
VSP One B24 Base 3.3
Extension 1 Not applicable
Extension 2 Not applicable
Extension 3 Not applicable
VSP One B26 Base 3.3
Extension 1 6.0375
Extension 2 Not applicable
Extension 3 Not applicable
VSP One B28 Base 3.3
Extension 1 6.0375
Extension 2 9.375
Extension 3 Not applicable