Block Storage

 VSP One Capacity question

Jump to  Best Answer
  • Block Storage
  • VSP One Block
Javier Camargo Soto's profile image
Javier Camargo Soto posted 01-08-2026 18:27

Good afternoon,

 I need your help calculating the usable capacity of a VSP B28 with the following configuration:

I intend to purchase storage with 49 60TB disks and need to calculate the usable capacity it will give me after creating the pool.

I understand that I need to create two DDP groups, one with 32 disks and another with 17. Can these be in the same pool, or will each DDP have its own pool?

I'll be waiting, thank you very much.

Best regards.

Antonius Schwefer's profile image
Antonius Schwefer posted 01-09-2026 15:26  Best Answer

Good evening,

a pool can contain up to 4 DDP groups.

The usable capacity can be calculated like this (RAID 6 6D+2P):

(Number of drives - 1) driveCapacity  * 0,75 

It makes sense to create two DDPs with similiar capacity (24 and 25 drives for example).

This is possible by RAIDCOM only, because VSP One Block Administrator would create one DDP with 32 and another with 17 drives.

The usable capacity for a DDP with 24 60TB drives with 6D+2P will be roughly:

23*60TB*0,75 = 1035TB 

Best regards from snowy Germany

Toni