How many drives are needed for RAID 0, RAID 1, RAID 5, and RAID 10 and...

How many drives are needed for RAID 0, RAID 1, RAID 5, and RAID 10 and why?

Expert Solution

Ans: RAID levels and minimum no. of disks needed

RAID level	Minimum no. of drives	Reason to use that disks
RAID 0	2	Because here the data is split between more than 1 disk.By splitting data across the disks the read and write operation is easy to perform if we split we need minimum 2 drives to store data
RAID 1	2	This level uses mirror technology.It means the same data is stored in another mirror for future safety.if any drive data block miss then the data can be easily recovered from mirror drive
RAID 5	3 and max=16	In this level it strips the data across the drives and sets parity in each drive and another separate drive is allocated for parity checksum. for splitting and sharing the data across drives we need at least 2 drives and another drive for parity checksum
RAID 10	4	It uses both stripping+mirroring technology.so, if we need to strip the store among multiple drives we need minimum 2 drives and it also uses mirror technology,so the data among drives are again need a mirror dive so, that minimum 2 drives need another 2 drives for mirroring so, we need minimum of 4 drives

venereology answered 1 week ago

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