Storage Management Questions

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251.

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

Correct Answer: A

Other requests are allowed to be processed by other disks.

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252.

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

A

low

B

very low

C

high

D

none of the mentioned

Correct Answer: C

All disks can be read in parallel.

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253.

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

Correct Answer: D

None.

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254.

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

Correct Answer: C

None.

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255.

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

Correct Answer: C

None.

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256.

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

A

3

B

4

C

5

D

all of the mentioned

Correct Answer: C

None.

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257.

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

Correct Answer: B

None.

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258.

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

A

1

B

2

C

3

D

4

Correct Answer: A

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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259.

Where performance and reliability are both important, RAID level ____ is used.

B

1

C

2

D

0+1

Correct Answer: D

None.

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260.

A large number of disks in a system improves the rate at which data can be read or written if ____________

A

the disks are operated on sequentially

B

the disks are operated on selectively

C

the disks are operated in parallel

D

all of the mentioned

Correct Answer: C

None.

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