Performance of RAID 1 with 3 Disks under Linux

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http://unix.stackexchange.com – The standard way to setup a RAID 1 under Linux is to use two disks of the same size. The write performance is almost as good as with a single disk drive. The read performance can be up to twice the speed of a single disk. For additional redundancy, we want to add another disk as a hot spare to the system. In the past the rebuild of RAID 1 and RAID 5 setups with disk sizes of 1-3TB did sometimes cause problems, because the "still living" disks are heavily stressed for the rebuild, and then also might fail... We have now read that with Linux we can also make a RAID 1 with 3 identical disks. T (HowTos)