Question: 19. You have a RAID level 4 system with eight data disks and one parity disk. (a) How many disk reads and disk writes must

19. You have a RAID level 4 system with eight data disks and one parity disk.

(a) How many disk reads and disk writes must you make to write one data stripe if you do not make use of the old data and parity values?

(b) How many disk reads and disk writes must you make to write one data stripe if you do make use of the old data and parity values?

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