On Sun, 20 Dec 1998, Marc SCHAEFER wrote: > In article <75jlfu$lk3$1at_private> you wrote: > > This seems to be something that a good backup/archive system[1] ought > > to be recording whilst it backs up files, so that one could simply run > > a check of all files on a system against those in the database. > > tar has a compare option, comparing filestamps, size and md5. > rpm has a verify option > cpio has a CRC option. > tar can be used with Amanda backup. All of these store the checksum or CRC with the data, which I don't think this fellow was looking for. Many backup systems keep an on-line database of all of the files that have been backed up, so you can find out when a file last changed, what tapes it is on, and so on. If this database also stored the CRCs of all the versions of the files, you could check the integrety of the file against this database, rather than against the backup. cjs -- Curt Sampson <cjsat_private> 604 801 5335 De gustibus, aut bene aut nihil. The most widely ported operating system in the world: http://www.netbsd.org
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