From mboxrd@z Thu Jan  1 00:00:00 1970
From: lm@bitmover.com (Larry McVoy)
Date: Thu, 21 Jan 2010 13:01:55 -0800
Subject: [TUHS] Irwin 285
In-Reply-To: <20100121210020.GK25687@freebie.xs4all.nl>
References: <20100121185917.GA25619@freebie.xs4all.nl>
	<20100121204829.672d59a7.jkunz@unixag-kl.fh-kl.de>
	<20100121195619.GE25687@freebie.xs4all.nl>
	<20100121195818.GF9956@bitmover.com>
	<20100121200034.GG25687@freebie.xs4all.nl>
	<20100121201125.GG9956@bitmover.com>
	<46b366131001211226v1a133901mefa41b3258a5b173@mail.gmail.com>
	<20100121204157.GI25687@freebie.xs4all.nl>
	<20100121204429.GH9956@bitmover.com>
	<20100121210020.GK25687@freebie.xs4all.nl>
Message-ID: <20100121210155.GJ9956@bitmover.com>

> > If you aren't backing up with a crc then you are doing it wrong.
> 
> True, but CRC does not buy you much if the media are fubared enough to be
> largely unreadable.

We compare the CRC against previous backups.  A table of

pathname, size, mtime, CRC

you compare all the ones that are the same and flag the ones that differ
only in CRC.
-- 
---
Larry McVoy                lm at bitmover.com           http://www.bitkeeper.com
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