> Why logging filesystems don't work:
>
> You generally (with the hardware available in PCs now)
> can't tell the difference between:
>
> 1) loss of power (ok!)
> 2) crash where the filesystem datastructures weren't corrupted (ok!)
> 3) crash where the filesystem datastructures were corrupted (ouch)
> 4) crash where the disk/bus got scrambled (ouch)
Nice analysis. I have a vague memory (I can't seem to find the message
in the archives) of somebody on -current talking about a proposal for a log
device that emitted events from the filesystem. Something like that and a WORM
might make a reliable logging filesystem.
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