Re: Paranoid mode for RAID-1 ?

[Adam Goryachev <mailinglists@websitemanagers.com.au>]

On 27/04/15 16:37, Jean-Baptiste Thomas wrote:
> I'm looking for a way to get MD to operate in a mode in which
> reading a sector from a RAID-1 device would not succeed until it
> got matching data from at least two components.
>
> Recent experience[1] suggests that a transient problem in one
> disk can completely hose a four way RAID-1 array, which is
> otherwise supposed to still be fine after a triple total
> failure. I'm hoping that a paranoid mode would have prevented
> that.

There isn't any such thing that I am aware of in Linux MD RAID. However, 
I've heard that if you want data integrity, then you could use zfs, 
which supports RAID as well as data checksums to ensure that the data 
read back matches the data you wrote....

Personally, I've never used zfs, and there might be other FS's that will 
have the feature as well (eg, btrfs etc).

Hope that helps...

Regards,
Adam
-- 
Adam Goryachev Website Managers www.websitemanagers.com.au