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I have a RAID1 setup with two 3TB disk, is it possible for me to buy two 4TB disk and expand my DiskGroup?

Thomas G. Lau
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Yes, but you'll probably lose 2 TB, because only 3 TB will be used on each of the new drives.

wazoox
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  • So there is no way to use new space? – Thomas G. Lau May 18 '16 at 23:49
  • I don't know specifically the LSI MegaRAID 9271-8i, @ThomasG.Lau . Some controllers allow you to create a second RAID-1 of 1 TB on the remaining space, but I would strongly advise against this if you care about performance... – wazoox May 19 '16 at 18:58