Question -
______________ which increases the number of I/O operations needed to write a single logical block, pays a significant time penalty in terms of write performance.
Options:
A .  RAID level 1
B .  RAID level 2
C .  RAID level 5
D .  RAID level 3
Answer: Option C
In level 5, all disks can participate in satisfying read requests, unlike RAID level 4, where the parity disk cannot participate, so level 5 increases the total number of requests that can be met in a given amount of time.
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