5V0-22.23 · Question #29
What are two prerequisites for using the TRIM and UNMAP capability of vSAN? (Choose two.)
The correct answer is C. The VM guest operating system supports ATA TRIM or SCSI UNMAP capability. D. TRIM and UNMAP is enabled. In an attempt to be more efficient with storage space, modern guest OS file systems have had the ability to reclaim no longer used space using what are known as TRIM/UNMAP commands for the respective ATA and SCSI protocols. vSAN has full awareness of TRIM/UNMAP commands sent…
Question
What are two prerequisites for using the TRIM and UNMAP capability of vSAN? (Choose two.)
Options
- ADeduplication and compression are enabled.
- BThe vSAN cluster is an all-flash architecture.
- CThe VM guest operating system supports ATA TRIM or SCSI UNMAP capability.
- DTRIM and UNMAP is enabled.
- EChange the Object Space Reservation to 100.
How the community answered
(28 responses)- B7% (2)
- C89% (25)
- E4% (1)
Explanation
In an attempt to be more efficient with storage space, modern guest OS file systems have had the ability to reclaim no longer used space using what are known as TRIM/UNMAP commands for the respective ATA and SCSI protocols. vSAN has full awareness of TRIM/UNMAP commands sent from the guest OS and can reclaim the previously allocated storage as free space. This is an opportunistic space efficiency feature that can deliver much better storage capacity utilization in vSAN environments. VMware Specific Guidance In vSAN 8, TRIM/UNMAP can be enabled in the User Interface, under the services enablement https://core.vmware.com/resource/vsan-space-efficiency-technologies#sec19560-sub6
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