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Operating System » Mass Storage Raid 1

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Virtual Memory Thrashing

RAID level 3 supports a lower number of I/Os per second, because _______________

A. Every disk has to participate in every i/o request
B. Only one disk participates per i/o request
C. I/o cycle consumes a lot of cpu time
D. All of the mentioned

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RAID level _____ is also known as block interleaved parity organisation and uses block level striping and keeps a parity block on a separate disk.

A. 1
B. 2
C. 3
D. 4

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A performance problem with _________ is the expense of computing and writing parity.

A. Non-parity based raid levels
B. Parity based raid levels
C. All raid levels
D. None of the mentioned

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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

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The overall I/O rate in RAID level 4 is ____________

A. Low
B. Very low
C. High
D. None of the mentioned

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A write of a block has to access ____________

A. The disk on which the block is stored
B. Parity disk
C. A parity block
D. All of the mentioned

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RAID level 5 is also known as ____________

A. Bit-interleaved parity organization
B. Block-interleaved parity organization
C. Block-interleaved distributed parity
D. Memory-style ecc organization

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RAID level ____ spreads parity and data among all N+1 disks rather than storing data in N disks and parity in 1.

A. 3
B. 4
C. 5
D. 6

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The potential overuse of a single parity disk is avoided in RAID level _______

A. 3
B. 4
C. 5
D. All of the mentioned

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RAID level 0+1 is used because, RAID level 0 provides ______ whereas RAID level 1 provides ________

A. Performance, redundancy
B. Performance, reliability
C. Redundancy, performance
D. None of the mentioned

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