Re: another hard disk broken or xfs problems?

[Rogier Wolff <R.E.Wolff@BitWizard.nl>]

On Thu, Feb 26, 2004 at 09:25:51AM +0100, Nico Schottelius wrote:
> I am really wondering about the error message, as "internal errors" 
> indicate for me an error in the kernel.

[...]

> And btw, do all filesystem drivers behave in this way, printing internal
> errors and displaying call traces when they find errors in the
> filesystem?

For a filesystem driver, things are clear: it's the only one writing
to the data on the drive. So when things go wrong: in principle, it's
an internal error. 

It would be nice if you'd always be able to salvage your data by
just mounting the partition, but that's not the case. A specialized
program like ...-repair or fsck will do a better job. 

Now for a logging filesystem, the assumption that it messed up itself
is even stronger than for a classical filesystem. It should be able
to handle whatever happens. 

It's very difficult to check all assumptions about what's on the disk
at every step and still have a reasonable performance. That's why some
errors may only be noticed a bit late and lead to slightly misleading
error messages. 

	Roger. 

-- 
** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2600998 **
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