A technician is installing and configuring a storage array on a Windows server. There are four disk slots available, and the only requirement is that the RAID array survives the loss of two drives. Which of the following RAID levels should be used?
Raid 60 is not on the objectives and needs a minimum of 8 disks. Raid 6 technically is not on the objectives too but is mentioned in questions. That provides absolute double fault tolerance. Any two disks can fail. The correct answer here would be raid 10. Raid 10 provides double fault tolerance but it depends on which two disks fail. It isn't absolute.
Advantages of RAID 6
Like with RAID 5, read data transactions are very fast.
If 2 drives fail, you still have access to all data, even while the failed drives are being replaced. So RAID 6 is more secure than RAID 5.
If the "60" is actually a typo and it would actually show "6", I think RAID 6 would be the better answer when compared to a RAID 10. RAID 6(four or more drives) allows two drive failures across the board, doesn't matter which two drives. RAID 10 can technically allow two drive failures, but they would have to be two specific drives to allow continued function after the drive failures(i.e Lose half of each subset, you're OK. Lose two drives in the same subset, you're screwed). Just keep this in mind when going over the available answers as they may change.
60 needs 8 disks minimum and only 4 are available. We cannot presume we have more already. Raid 6 has the dual parity but can only allow one failure like raid 5. RAID 1 also only allows 1 drive to fail and does not require 4 disks. RAID 10 uses 4 disks! and raid 10 allows two disks to fail. Whoever made this question knows less than the students trying to learn it and RAID 60 is not on the objectives!
the peoples behind those questions must be fired... the answer is C but.. RAID10 is technically considered one drive failure ... the second drive failure is partially supported, depending on which drives fails.
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