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- Newsgroups: comp.sys.amiga.introduction
- Path: sparky!uunet!snorkelwacker.mit.edu!thunder.mcrcim.mcgill.edu!sobeco!sdesmara
- From: sdesmara@sobeco.com (s.desmarais)
- Subject: Re: HDBackup/BRU
- Organization: Sobeco Ernst & Young
- Date: Thu, 3 Sep 92 18:22:34 GMT
- Message-ID: <1992Sep3.182234.17887@sobeco.com>
- References: <1992Aug20.160727.4775@kakwa.ucs.ualberta.ca> <1992Aug20.193007.889@galaxy.gov.bc.ca>
- Lines: 47
-
- In <1992Aug20.193007.889@galaxy.gov.bc.ca> ewilts@galaxy.gov.bc.ca (Ed Wilts) writes:
-
- >In article <1992Aug20.160727.4775@kakwa.ucs.ualberta.ca>, charro@ee.ualberta.ca (Dan Charrois) writes:
- >> I've recently purchased WB2.05 and would like to make a backup of my
- >> HD. But something seems a bit strange with HDBackup/BRU supplied with
- >> WB2.05. I can't remember the exact numbers, but if I want to back up
- >> 90 Megs or so of data, it will take approximately 120 Megs of storage
- >> space on floppies. Surely 30 Megs isn't used up in header
- >> information!
-
- >Step one is to turf HDBackup. Step two is to purchase Ami-Back. Step three is
- >to use Ami-Back to make some reliable backups to your floppies.
-
- >There are serious limitations with using BRU to back up many small files. The
- >overhead simply kills you, as you've noticed... you're not doing anything
- >wrong except using the wrong tool for the job.
-
- >Ed Wilts, BC Systems Corp., 4000 Seymour Place, Victoria, B.C., Canada, V8X 4S8
- >EWilts@Galaxy.Gov.BC.CA | Ed.Wilts@BCSystems.Gov.BC.CA | (604) 389-3430
-
- I don't know what's this doing in .intro, but anyway...
-
- Don't bash too hard on BRU. I use it daily on MIPS, RS6000, SCO, SVR4, etc.
- True, I never used it on the amiga. Mine is still at 1.3
-
- But you're right about overhead: BRU was designed to write using fixed block
- sizes to the archive medium. 2k blocks. There's about a 200 bytes header
- (could be less, I don't remember exactly) with most of this going
- for the complete file name with path. So for 10 bytes files, you loose much.
- Not for big files though.
-
- The reason for this is because it's easier to recover in case of data error
- on the medium while restoring: you'll only loose one file, or even just
- part of a file.
-
- Bru works great on a tape drive. For backing up small files real fast to
- floppies, you're probably better off with something else.
-
- P.S. We have a source license for BRU, that's why I know so much details.
- I hope I didn't violate my license agreement :=)
-
- P.P.S. Is Fred Fish still associated with Bru and EST?
- --
- Stephane M. Desmarais sdesmara@sobeco.com ou sdesmara@sobeco.ca
- Division STS - Sobeco Ernst & Young {uunet | mcgill-vision}!sobeco.com!sdesmara
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