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Question 12 - D-XTR-DS-A-24 discussion

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Which SCSI instructions are used to build a bitmap of the changes between the first snapshot and subsequent snapshots when RecoverPoint is used with XtremIO?

A.
SCSI DIFF
Answers
A.
SCSI DIFF
B.
SCSI DELTA
Answers
B.
SCSI DELTA
C.
SCSI TRANSFER
Answers
C.
SCSI TRANSFER
D.
SCSI UPDATE
Answers
D.
SCSI UPDATE
Suggested answer: A

Explanation:

The SCSI DIFF instruction is used to build a bitmap of the changes between the first snapshot and subsequent snapshots when RecoverPoint is used with XtremIO1.

The DIFF protocol is a vendor-specific SCSI command which RecoverPoint uses to query XtremIO in order to obtain a bitmap of changes between two snapshot sets1. RecoverPoint uses the output of the DIFF command to read the actual data and transfer it to the target side1.

The other options provided are not typically used for this purpose:

SCSI DELTA is not a recognized SCSI command2.

SCSI TRANSFER is not a recognized SCSI command3.

SCSI UPDATE is not a recognized SCSI command4.

Therefore, the verified answer is A. SCSI DIFF, as it is the SCSI instruction used to build a bitmap of the changes between the first snapshot and subsequent snapshots when RecoverPoint is used with XtremIO1.

asked 16/09/2024
Shangar Sundaralingam
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