Re: writing file to disk: not as easy as it looks

From: Pavel Machek
Date: Wed Dec 03 2008 - 13:14:54 EST

> > CRC errors, lost IRQs and the like are retried by the midlayer and
> > drivers and the error handling strategies will also try things like
> > reducing link speeds on repeated CRC errors.
> I meant for example loose cable or so --- does it make sense to retry
> indefinitely (until the admin plugs the cable or unmounts the filesystem)
> or return error to the filesystem after few retries?

It is quite non-trivial to detect if it is "disk plugged back in"
vs. "faulty disk unplugged, new one plugged in"... so I suppose
automatic retry after failure of connection to disk is quite hard to
get right.

(cesky, pictures)
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