Date: Mon, 31 Jan 2000 16:20:16 -0000 (GMT) From: "Steve O'Hara-Smith" <steveo@eircom.net> To: Alfred Perlstein <bright@wintelcom.net> Cc: freebsd-stable@FreeBSD.ORG, Tom <tom@uniserve.com>, Gary Palmer <gjp@in-addr.com> Subject: RE: More than just logging, Re: JFS Message-ID: <XFMail.000131162016.steveo@eircom.net> In-Reply-To: <20000131020845.T13027@fw.wintelcom.net>
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> 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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