Re: [MC] Re: [CHECKER] e2fsck writes out blocks out of order,

From: Dawson Engler
Date: Wed May 12 2004 - 01:31:24 EST

> On Tue, 11 May 2004, Junfeng Yang wrote:
> > Hi,
> >
> > We got a warning that the filesystem was in a inconsistent state when:
> > 1. created a crashed disk image
> > 2. ran fsck over the image and then crash fsck at certain point
> > 3. re-ran fsck.
> Question? Is fsck specified to be able to be crashed? I'm not
> sure you could ever make a repair-tool that could do that unless
> there was some "guaranteed to save device" on an independent power
> source during the repair. Fsck can't commit partial fixes of some
> stuff because it would leave the file-system in an unrecoverable
> state. It needs to complete.

To the extent that it is simply replaying records in a journal, it should
be able to crash at arbitrary points before commit and then restart
without fuss. That's one of the motivations for using logging in a file
system ;-)
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