[kwlug-disc] btrfs(raid5) or ext4/mdadm(raid5) ?

[Chris Irwin]

On Wed, Jun 03, 2015 at 08:53:58PM -0400, William Park wrote:
> BTRFS has raid features built into the filesystem.  So, my question is, 
>     Is BTRFS with raid5 options better than EXT4/MDADM for handling bad
>     sectors?

Is this just data storage, or a system drive?

All your data is correctly checsummed, so you can be confident you're
getting correct data, or an error (and thus going to backups). There is
a potential for mdadm to return bad data, especially if you have failing
disks.

Note that RAID5 support in BTRFS is not something I'd recommend
currently. "Raid1" works fine with multiple devices.

-- 
Chris Irwin

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