The disk mode of the cloud hard disk service EVS can be divided into SCSI type and () type according to whether it supports advanced SCSI commands.

Question

Options

• AVBD

• A
  100% (67)

Explanation

Option A, VBD (Virtual Block Device), is correct because EVS disk modes are classified into exactly two types based on SCSI command support: the SCSI type, which supports advanced SCSI commands such as SCSI reservations used in clustering scenarios, and the VBD type, which does not support these advanced commands and functions as a simpler virtual block device. Since this question has only one answer choice provided, there are no distractors to evaluate. The two-type classification is a fundamental distinction in EVS configuration, as choosing the wrong disk mode for a workload (for example, using VBD where SCSI reservations are required) would cause certain cluster or shared-disk applications to fail.

Memory tip: Think of the pair as "SCSI vs. VBD" - SCSI gets the advanced commands, VBD gets the basics. If you remember that SCSI stands for Small Computer System Interface and carries its legacy of rich command support into the cloud, VBD naturally becomes the stripped-down alternative.

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