Which of the following are application scenarios of disk pre-copy? (Multiple choice)

Question

Options

• ASlow disk
• BRisky disk
• CFailed disk

• A
  84% (27)
• C
  16% (5)

Explanation

Disk pre-copy is a proactive data migration technique used to copy data off a disk while it is still partially or fully readable, as a preventive measure. Slow disks (A) are valid candidates because degraded performance often signals impending failure, and pre-copying their data to a healthy disk avoids data loss before the situation worsens. Risky disks (B) are the primary use case - disks showing warning signs such as bad sectors or abnormal SMART readings warrant pre-copy to preserve data before an actual failure occurs.

Failed disks (C) are excluded because pre-copy requires the source disk to still be readable; once a disk has completely failed, data cannot be read from it, making pre-copy impossible at that point - recovery tools or backups would be needed instead.

Memory tip: "Pre" means before. Pre-copy only works when the disk is still alive enough to be read. Slow and risky disks are still alive; a failed disk is not.

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