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Re: netbsd and RAID and UCR errors on large drives
Thilo Jeremias writes:
> I'm wondering about the algorithm that is implemented in netbsd.
> I believe that the most common errors for large drives are single read
> those errors should be (IMHO) recoverable in a raid set by re-writing
> the failing blocks
> from a working drive.
> Discussions suggest, that the non decreasing error rate for drives, will
> cause in a couple of years (assuming constant capacity increase),
> a guaranteed UCR while rebuilding a raid system, so the suggestion is to
> use RAID6 to allow for that.
Perhaps in a couple of years all drives will be solid state, and we
won't need to worry about them as much? ;)
> As I said above some drive failures should be avoidable w/o raid6 and
> I'm wondering if
> netbsd does (or will) implement such a single block recovery ?
NetBSD currently does not implement such single block recovery.
Doing so is on a TODO list, along with many other things (like
working with the existing RAID 6 code).
> Is there another interface into the smart error list than smartctl ?
I don't know the answer to that one.
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