Dell EMC PowerStore Array Thin Provisioning does not work with InfoScale for Windows
Article ID: 100059084
Updated On:
Description
Description
For the Dell-EMC PowerStore array, there is an ask to support the Thin Provisioning feature for the array from Veritas InfoScale for Windows.
The default allocation size for PowerStore thin provisioned disks is calculated from the VPD Page 0xB0 which evaluates to 4.00 KB.
When writing any data to thin provisioned disks, it is expected that the array should re-evaluate the allocation size using the below calculation.
size = resource_count * default_allocation_size
The issue here is with the resource count parameter getting populated from the VPD Page 0x0C. The value 0x0C always remains as 1 (static value), no matter how much data is written to the disk(s).
Veritas does recognize PowerStore LUNs as 'Thin Provisioned', which is shown in the VEA console); however, InfoScale for Windows is unable to utilize these capabilities due to the issue mentioned above.
Resolution
At present, a solution is not available as this is a hardware limitation from the array side.
The expectation is that the vendor will remove the limitations, then InfoScale for Windows will be able to provide thin provision and reclaim capabilities for PowerStore arrays.
Issue/Introduction
