Re: srfs - a new file system.

Andreas Dilger
2003-10-24T21:16:22Z

On Oct 24, 2003 14:52 -0600, Pat LaVarre wrote:
> "How can we know how commonly that occurs in practice, so that we can
> know how often we're wrong to believe such things as our locally
> recorded vector time?"
>
> Is there, as yet, no linux filesystem that preserves the integrity of
> the data and metadata despite such failures? If I could write such an
> fs on to a single directly-attached local drive, then I could measure
> how often I myself experience such failures.
>
> I'm confident I actually do experience these failures because often I
> work in comparative, raid-like measures. When I see one drive and
> another disagree about what I wrote, then whenever I trust my write and
> diff and read tools I must conclude one or both of the HDD's is wrong.

I recall there being a loopback driver that will write a checksum for each
block written to the device into a separate block device (probably just
another loop device on a separate filesystem) so you could use that to
verify your data on each read.

Cheers, Andreas
--
Andreas Dilger