Hello, We have a RAID10 across 4 3TB drives (metadata version 1.2, 2 offset-copies, bitmaps), with LVM on top. We are running out of space, but we don't really want to invest in 4 new 4TB drives right now. Is it possible to replace only two of the 3TB drives with 4TB drives and get an extra terrabyte into the array somehow? Anything I tried so far on a test system didn't work. I can add the new devices to the RAID, but if I try to grow the array to the new size, I get: mdadm: component size of /dev/md2 unchanged at X Do I have to fail two drives, create a new RAID10, add a new LVM PV on it, and pvmove the data over, all the while hoping that none of the four disks die — even though there is a backup (the two failed drives), that's a one-shot backup and that is too risky. That said, it isn't even possible to have a RAID10 across 2x2 pairs of disks with different sizes, is it? Why not? I'd really rather avoid pulling two RAID1s together with LVM, although I guess that is essentially the same as RAID10. Thanks, -- martin | http://madduck.net/ | http://two.sentenc.es/ "the pure and simple truth is rarely pure and never simple." -- oscar wilde spamtraps: madduck.bogus@xxxxxxxxxxx
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