[TUHS] Irwin 285

[Larry McVoy]

On Thu, Jan 21, 2010 at 04:36:21PM -0500, lyricalnanoha wrote:
> On Thu, 21 Jan 2010, Larry McVoy wrote:
>
>>>> 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.
>
> Sounds a lot like SFV files.

Yeah, except that it works when the files don't have the CRC's, i.e.,
it works for all files unchanged since the last backup.
-- 
---
Larry McVoy                lm at bitmover.com           http://www.bitkeeper.com
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