Date: Tue, 2 Jul 2002 10:26:45 -0400 From: Brian T.Schellenberger <bts@babbleon.org> To: baszd-meg@excite.com Cc: freebsd-questions@FreeBSD.ORG Subject: Re: How to get back FreeBSD-dumped data with linux-restore. Message-ID: <20020702142645.D836FBB2C@i8k.babbleon.org> In-Reply-To: <20020702142111.92BC8BB2C@i8k.babbleon.org> References: <20020702135243.648568AF13@xmxpita.excite.com> <20020702142111.92BC8BB2C@i8k.babbleon.org>
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On Tuesday 02 July 2002 10:21 am, Brian T.Schellenberger wrote: | On Tuesday 02 July 2002 09:52 am, baszd wrote: | | Hi! | | | | > There are a number of possible ways to handle this. | | | | Ok, I forgot some possibilities... | | | | > The first is to *not* use dump and restore at all, but to use one of | | > the many | | > portable solutions for backup and restore, such as "tar", | | > "cpio", "afio", or | | > "pax." That way, you can back up and restore from any old | | > system, and you | | > can switch, mix, and match backup servers willy-nilly. | | | | I think those old-school tools won't match my needs. I have to backup | | about 20 GB from that FreeBSD server. If I need maybe a file with a size | | of a few kb, than I have to wait hours to get it back (correct me if I'm | | wrong). | | This varies from tool to tool, and you should read up on them, but in | general it shouldn't take very long to restore a single file. The only | thing that should slow it down the seek time, and you have to pay that | price no matter what you use to do the backup. Since tapes are NOT <--- tapes are "not" random-access . . . . is what I meant to say. I hate it when I do that. | random-access devices you basically have to read everything from the start | of the tape onward to find anything on the tape, but this is true | regardless of the software tool involved. | | Since backup and restore just backup the file system "as is" and don't | translate, they are less intensive to backup and when doing the actual file | restores, but finding a single file out of the archive is probably a win | for the others; I very much doubt that it's a lose. | | And as for the backup time, it's entirely likely that this process is | entirely i/o bound so that that other tools won't slow you down much. | | The big drawback is that they don't automatically do all that | "daily/weekly/monthly" automated interleaved stuff. You'd have replicate | that yourself with a perl script or something. | | | > disk as long as the disk was mounted across the network to the Linux | | > machine | | | | All right, that's an idea. It would be easy to mount the slice via nfs | | (or even via smb), but the disadvantage is a weak security. | | You could use afs if you want a really high level of security. You must | somehow be getting the data for multiple machines now; how do you do that? | Note also that if you wnat to go for ultimate security you an physically | move the disk since each can mount the other's files directly. | | | > "restore" machine for dual-boot, since I presume that it's | | | | That would be feasible, but somehow circumstantial. | | I'm not sure that I understand this one. | | | > It also *might* work to use FreeBSD exclusively on the restore machine, | | > and | | > run the *Linux* restore under the Linux eumulator for doing the | | | | Mhm, could be dangerous as long as unexpectable flaws can occur. | | Yes . . . has anybody tried this? Does it work? | | | > Hope this helps. | | | | Yes, thanx! It helps to think about some alternatives. However I'll check | | out the dump | dd-thing first and see how reliable it is. | | That's surely easiest if this is a one-shot problem. | | | cu, | | | | bm. | | | | | | ------------------------------------------------ | | Join Excite! - http://www.excite.com | | The most personalized portal on the Web! -- Brian T. Schellenberger . . . . . . . bts@wnt.sas.com (work) Brian, the man from Babble-On . . . . bts@babbleon.org (personal) http://www.babbleon.org http://www.eff.org http://www.programming-freedom.org If you smell the smoke you don't need to be told what you've got to do; Yet there's a certain breed, so very in-between, they'd rather take a vote. -- DEVO -- Here To Go To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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