RAID Structure - 1 - Operating System Questions & Answers

1.

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

Answer: Option 'B'

parity based RAID levels

2.

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

Answer: Option 'D'

4

3.

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

Answer: Option 'A'

only one disk

4.

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

   A.) 1
   B.) 2
   C.) 3
   D.) 4

Answer: Option 'A'

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

5.

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

Answer: Option 'D'

all of the mentioned

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