A power failure that occurs while a disk block is being written could result in the block being only partially written. Assume that partially written blocks can be detected. An atomic block write is...

A power failure that occurs while a disk block is being written could result in
the block being only partially written. Assume that partially written blocks can
be detected. An atomic block write is one where either the disk block is fully
written or nothing is written (i.e., there are no partial writes). Suggest schemes
for getting the effect of atomic block writes with the following RAID schemes.
Your schemes should involve work on recovery from failure.
a. RAID level 1 (mirroring)
b. RAID level 5 (block interleaved, distributed parity)

Jun 09, 2022

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A power failure that occurs while a disk block is being written could result in the block being only partially written. Assume that partially written blocks can be detected. An atomic block write is...

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