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In RAID level 4, one block read, accesses __________

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In RAID level 4, one block read, accesses __________

(a) only one disk

(b) all disks simultaneously

(c) all disks sequentially

(d) none of the mentioned

The question was asked in an international level competition.

This key question is from RAID Structure in chapter Mass-Storage Structures of Operating System

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The correct option is (a) only one disk

To explain: Other requests are allowed to be processed by other disks.

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