This, however, means more wear and tear for the parity drive. RAID 3 is similar to RAID 5, but with one drive allocated to store drive parity information instead of striping parity across all drives.It is based on Hamming code and is relevant for systems combining large numbers of disks. RAID 2 combines two groups of disks, one containing data and the other containing error correcting code.RID 6 is used to increase disk space, boost read and write speeds, and improve reliability over the level provided by RAID 5. It can restore itself automatically even if 2 (two) disks fail. RAID 6 – data striping with double parity. The difference between 5EE and 5E is that the former array includes a hot spare drive that is actively used in the array operations.
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