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Old 03-31-2011, 02:30 AM   #1
LXer
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LXer: Software RAID on Linux with mdadm


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We’ve spent a great deal of time examining various RAID levels such as RAID-0, 1, 5, and 6, and Nested RAID levels such as RAID-10, 50, 51, 61, and 60 or even the more complicated RAID-100 or RAID-160. In all of these discussions we have assumed there was a RAID “controller” that performed the various RAID operations. This includes sending chunks of data to the appropriate disks, computing parity, hot-swapping, disk fail-over, checking read transactions to determine if the read was successfully and if not, declaring that disk as “down”, plus other important tasks related to RAID. All of these tasks require some sort of computation and have to be performed by a RAID controller.

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