3 ms·
NAS usage, over mdadm RAID1, over about 10 years (and 1 or 2 drive failures, 1 or 2 bad RAM dies) I didn't lose a file that I could definitely attribute to btrf
by rhn_mk1 7y ago
NAS usage, over mdadm RAID1, over about 10 years (and 1 or 2 drive failures, 1 or 2 bad RAM dies) I didn't lose a file that I could definitely attribute to btrfs. I did lose a piece of a file I keep on it, but I cannot conclude it didn't arrive there damaged.
I used to hit out of space errors on rebalancing at high usage levels, but since around kernel 4.0 the only time I hit one was when I altered data duplication settings.
- zlynx 7y agoI don't understand why anyone would run btrfs with MD RAID. That configuration loses the ability to recover from corrupted blocks. All that MD can do is in response to actual reported drive errors. If one of the drives accepts the write but then later silently returns the old data, which is a failure mode I have actually seen, MD can't do anything reasonable to fix it.
- rhn_mk1 7y agoNative btrfs RAID1 wasn't stable when I started using it. I still wanted the stable non-RAID for the sake of snapshots.