Re: RAID5/6 permanent corruption of metadata and data extents

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On Sat, Apr 04 2020, Zygo Blaxell wrote:

> mdadm does one thing very well, but only the one thing.  I don't imagine
> Neil would extend mdadm to the point where it can handle handle silent

You are correct, I wouldn't.
md provides a block devices, btrfs provides a filesystem. They are
totally different things.  Saying that btrfs/RAID6 is "better" than
mdadm/raid6 is like saying the ext4 is "better" than a SCSI drive.  It
doesn't really mean anything.

I could argue that calling what btrfs does "RAID6" is misleading and
possibly the cause of confusion.  I think the decision to call what ZFS
does "RAID-Z" was probably a good idea - it is somewhat like RAID, but
on a whole new level.  Maybe the stuff btrfs does could be RAID-B :-)

NeilBrown

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