Hence the reason I said he had little idea what he's talking about - ext4 doesn't handle physical volumes - its not btrfs or ZFS.
Originally Posted by devsk
If you have large RAID (Say, above 6-8 drives), you don't use a ext4/LVM/SoftMD combo - you simply buy an expensive SAS RAID controller w/ RAID6 support and huge amounts of memory. (In my case: multiple ext4 partitions over a single LVM PV running on an external FC box)
DEV: Intel S2600C0, 2xE52658V2, 32GB, 4x2TB, GTX680, F20/x86_64, Dell U2711.
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