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If a disk fails in RAID level ___________ rebuilding lost data is easiest.

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If a disk fails in RAID level ___________ rebuilding lost data is easiest.

(a) 1

(b) 2

(c) 3

(d) 4

I got this question by my school teacher while I was bunking the class.

This is a very interesting question from RAID Structure topic in division Mass-Storage Structures of Operating System

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The correct answer is (a) 1

The best I can explain: Data can be copied from another disk in raid level 1, for other raid levels all other disks have to be accessed.

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