Stories
Slash Boxes
Comments

SoylentNews is people

posted by cmn32480 on Sunday August 07 2016, @02:38PM   Printer-friendly
from the how-bad-could-it-really-be dept.

The nice feller over at phoronix brings us this handy to have bit of info:

It turns out the RAID5 and RAID6 code for the Btrfs file-system's built-in RAID support is faulty and users should not be making use of it if you care about your data.

There has been this mailing list thread since the end of July about Btrfs scrub recalculating the wrong parity in RAID5. The wrong parity and unrecoverable errors has been confirmed by multiple parties. The Btrfs RAID 5/6 code has been called as much as fatally flawed -- "more or less fatally flawed, and a full scrap and rewrite to an entirely different raid56 mode on-disk format may be necessary to fix it. And what's even clearer is that people /really/ shouldn't be using raid56 mode for anything but testing with throw-away data, at this point. Anything else is simply irresponsible."

Just as well I haven't gotten around to trying it then.


Original Submission

 
This discussion has been archived. No new comments can be posted.
Display Options Threshold/Breakthrough Mark All as Read Mark All as Unread
The Fine Print: The following comments are owned by whoever posted them. We are not responsible for them in any way.
  • (Score: 3, Flamebait) by Entropy on Sunday August 07 2016, @09:38PM

    by Entropy (4228) on Sunday August 07 2016, @09:38PM (#385052)

    ZFS has everything BTRFS has, but in a vastly superior interface. Last I checked each snapshot in BTRFS needed to be mounted(why?) making your mount screen look like a tragedy. Also writable snapshots? Why would I ever want to write to a snapshot?! The point of a snapshot is it's frozen.

    Of course ZFS has had a superior version of raid5 forever now, block level replication based on snapshots, and physical devices(zvols) that can be used as virtual machine hard disks.(that can also be replicated!)

    No doubt BTRFS could one day achieve all those things, of course...but that day is far in the future.

    Starting Score:    1  point
    Moderation   +1  
       Flamebait=1, Insightful=1, Informative=1, Total=3
    Extra 'Flamebait' Modifier   0  
    Karma-Bonus Modifier   +1  

    Total Score:   3