vSAN requires disk group layout as 64 bit to support the large capacity drive error

[virtualinca]

Hi,

I am experiencing the following problem after upgrading to the latest version of vSphere and vSAN:

vSAN requires disk group layout as 64 bit to support the large capacity drive. (32bit-to-64bit conversion: With the advent of large capacity drives, vSAN required to update its internal structures to support them to allow high efficiency ratios.)Large capacity drives are defined as:16TB or larger drives for space efficiency disabled clusters.4TB or larger drives for space efficiency enabled clusters.

This health check warning indicates the disk group contains at least one large capacity drive but the disk group layout is still 32 bit. Remediation: Recreate the disk group with data evacuation.

Risk if no action taken: The large disk drive will not contribute to vSAN storage.

Did any of you guys experience the same and what was your approach in solving this?

[TheBobkin · Accepted solution]

@virtualinca, The solution is quite simple "Remediation: Recreate the disk group with data evacuation." - the disks will be recreated with Virsto 64-bit format if they require it (e.g. >4TiB if deduplication&compression enabled and >16TiB if deduplication&compression not enabled).

[virtualinca]

@TheBobkinyes, thats what I got from our engineering and support. Sadly, when you start to recreate the disk group with the option "date evacuation", vSAN evacuates data. deletes the old group and than it stops. You have to create new disk group manually.

Thanks!