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Question 86 - 5V0-22.21 discussion

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What are two prerequisites for using the TRIM and UNMAP capability of vSAN? (Choose two.)

A.
TRIM and UNMAP is enabled.
Answers
A.
TRIM and UNMAP is enabled.
B.
The VM guest operating system supports ATA TRIM or SCSI UNMAP capability.
Answers
B.
The VM guest operating system supports ATA TRIM or SCSI UNMAP capability.
C.
The vSAN cluster is an all-flash architecture.
Answers
C.
The vSAN cluster is an all-flash architecture.
D.
Change the Object Space Reservation to 100.
Answers
D.
Change the Object Space Reservation to 100.
E.
Deduplication and compression are enabled.
Answers
E.
Deduplication and compression are enabled.
Suggested answer: B, C

Explanation:

The TRIM and UNMAP capability of vSAN is used to reclaim space on an all-flash vSAN cluster by discarding blocks that are no longer in use. In order to use this capability, the following prerequisites must be met:

The VM guest operating system must support the ATA TRIM or SCSI UNMAP command. This will allow the guest OS to communicate with the vSAN datastore to inform it of blocks that are no longer in use.

The vSAN cluster must be an all-flash architecture. TRIM and UNMAP can only be used on all-flash vSAN clusters, as it doesn't make sense on the hybrid vSAN cluster.

This is explained in VMware vSAN documentation in the section "vSAN Space Reclamation"

Reference: https://docs.vmware.com/en/VMware-vSphere/7.0/vsphere-vsan-70-admin-guide/GUID-7E8F6C98-7C0B-4D21-8F1A-F3A3A9F4F4A4.html

asked 16/09/2024
Coleman Owie
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