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Question 45 - D-XTR-DY-A-24 discussion

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A systems administrator is installing a new Microsoft Windows 2012 host and has granted access to a 2 TB LUN from XtremIO. Quick formatting of the XtremIO LUN takes much longer than expected.

What is causing this delay in the formatting process?

A.
UNMAP is disabled
Answers
A.
UNMAP is disabled
B.
UNMAP is enabled
Answers
B.
UNMAP is enabled
C.
LBA Block size is set to 4 kB
Answers
C.
LBA Block size is set to 4 kB
D.
VAAI is disabled
Answers
D.
VAAI is disabled
Suggested answer: B

Explanation:

The delay in the quick formatting process of a 2 TB LUN from an XtremIO storage array when installing a new Microsoft Windows 2012 host is likely caused by the UNMAP feature being enabled. The UNMAP command is part of the SCSI thin provisioning set, which allows the host to inform the storage array which blocks are no longer in use and can be reclaimed. When UNMAP is enabled, the quick format process may take longer because the storage array needs to process these UNMAP commands and perform the necessary space reclamation tasks1.

It's important to note that while UNMAP can improve storage efficiency, it can also introduce overhead during operations like formatting, which can lead to delays. For detailed procedures and best practices, it is recommended to consult the Official Dell XtremIO Deploy Achievement document or reach out to Dell support for the most accurate guidance.

asked 16/09/2024
Ricardo Andres
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