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)
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 |