Among the options provided, RAID 5 (option C) offers no protection for the parity disk. In a RAID 5 setup, parity information is distributed among all the disks in the array. If two disks fail simultaneously, data will be lost, including parity data, which cannot be recovered.
The only RAID that don't have parity protection but uses a parity disk is RAID3, RAID 1 don't use parity disk and RAID5 writes parity in all disks except one, so if a disk fails the parity is rebuilt, therefore has a protection. The only answer that uses parity but is not protected is RAID3, if parity disk fails there's no protection to recover parity bits. Can't find on the CND book a mention to this, let me know if I'm wrong
RAID 1 i think, but the question is a litle confuse....
"RAID level 3 is disk striping with parity. It uses striping and parity as its main features to store data. This RAID level dedicates one drive to store the parity information"
i think is RAID1, not use parity because both disk have same data
upvoted 3 times
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