On Wed, 21 Mar 2001, Max TenEyck Woodbury wrote:
>
> Umm. Isn't RAID implemented as the md device? That implies that it is
> responsible for some kind of error management. Bluntly, the file systems
> don't declare a file system kaput until they've retried the critical
> I/O operations. Why should RAID5 be any less tolerant?
Because the low-level filesystems _have_ already re-tried. So there's no
point in the MD device doing the same thing. Once alow-level device has
an error, we've done all the retries it's sane to do (sometimes a lot
more), and MD retrying would only make error recovery slower by
multiplying the retry-time by some number.
Done the same thing twice doesn't make it better.
Linus
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