Re: Using Removable Hard Drives for Backup
ORBs provide 2.2G per disk, are SCSI, and are pretty cheap if I recall. greg "Richard C" <[EMAIL PROTECTED]>, on the subject of 'Re: Using Removable Hard Drives for Backup', is quoted as: > >http://www.raidzone.com > > 1 TB ~~21,000 > >rcb > >On Mon, 11 Dec 2000, Bernhard R. Erdmann wrote: > >> Rod Roberts wrote: >> [...] >> > Hopefully some backup hardware manufacturer may in future sell sell a >> > system comprised of hot plugable disk mechanisms with little or no >> > electronics and a drive bay with the supporting electronics. The >> > economics of this look quite good at the moment. Any thoughts on this?? >> >> Syquest: 44, 88 & 270 MB per medium ;-) >> > >-- >- >Richard Bond ([EMAIL PROTECTED] (206) 605-3561 >System Administrator K-351, Health Sciences Center >Department of Molecular Biotechnology Box 357730 >University of Washington Seattle, WA 98195 > > > >
Re: Using Removable Hard Drives for Backup
On Tue, 12 Dec 2000, Chris Karakas wrote: >Sigh...another O'Reilly book I'll have to buy. CVS - no matter how often >kind members of this list post the cryptic incantations for this temple, >I _will_ want to know it all when I enter it. I just ask myself why I >didn't buy all those fine manuals (BTFM) at once... ;-) Unless it came out within the last two months, there isn't a full-sized CVS book from O'Reilly yet. There's a pint-sized pocket reference of 75 small pages, which I bought a few months ago. Full-sized books are available in postscript (and pdf, I think) right from cvshome.org, for free. I downloaded and printed two of them. "Open Source Development With CVS" by Karl Fogel is pretty good, but the definitive reference is "Version Management with CVS" by Per Cederqvist et al. The later is often referred to simply as "The Cederqvist". This is also very good. I stuck each of them into 2" 3-ring binders and have many bookmarks in each. If the CVS Desktop Reference doesn't answer the question, one of the other two does. -- Joi Ellis [EMAIL PROTECTED], http://www.visi.com/~gyles19/
Re: Using Removable Hard Drives for Backup
"John R. Jackson" wrote: > > When available, you'll need to build from the latest 2.4.2 (or 2.5) CVS > source tree, which will have things beyond the 2.4.2 release tar image. > Sigh...another O'Reilly book I'll have to buy. CVS - no matter how often kind members of this list post the cryptic incantations for this temple, I _will_ want to know it all when I enter it. I just ask myself why I didn't buy all those fine manuals (BTFM) at once... ;-) -- Regards Chris Karakas Don´t waste your cpu time - crack rc5: http://www.distributed.net
Re: Using Removable Hard Drives for Backup
http://www.raidzone.com 1 TB ~~21,000 rcb On Mon, 11 Dec 2000, Bernhard R. Erdmann wrote: > Rod Roberts wrote: > [...] > > Hopefully some backup hardware manufacturer may in future sell sell a > > system comprised of hot plugable disk mechanisms with little or no > > electronics and a drive bay with the supporting electronics. The > > economics of this look quite good at the moment. Any thoughts on this?? > > Syquest: 44, 88 & 270 MB per medium ;-) > -- - Richard Bond ([EMAIL PROTECTED] (206) 605-3561 System Administrator K-351, Health Sciences Center Department of Molecular Biotechnology Box 357730 University of Washington Seattle, WA 98195
Re: Using Removable Hard Drives for Backup
>Please announce it loudly as soon as you are thus far, 'cause I'm eager >to mistreat my MO-disks as tapes too :-) Actually, I suspect just the mearest mention of actually having this ability in non-vaporware form will shake the ground :-). >Do I need to upgrade to 2.4.2 for this to work? I don't plan to back-port this to 2.4.1(p1). It shouldn't even go into 2.4.2 except I need it as part of multi-tape support and I don't want to brave the 2.5 waters yet. When available, you'll need to build from the latest 2.4.2 (or 2.5) CVS source tree, which will have things beyond the 2.4.2 release tar image. >Chris Karakas John R. Jackson, Technical Software Specialist, [EMAIL PROTECTED]
Re: Using Removable Hard Drives for Backup
"John R. Jackson" wrote: > > >Unless I misunderstand some recent contributions from Marc Mengel, it > >seems that this is now quite easy to do. See docs/VTAPE-API. > > Correct. What you want is my "file:" driver that sits on top of Marc's > work. I should have it ready in a day or two. > Please announce it loudly as soon as you are thus far, 'cause I'm eager to mistreat my MO-disks as tapes too :-) Do I need to upgrade to 2.4.2 for this to work? -- Regards Chris Karakas Don´t waste your cpu time - crack rc5: http://www.distributed.net
Re: Using Removable Hard Drives for Backup
>Unless I misunderstand some recent contributions from Marc Mengel, it >seems that this is now quite easy to do. See docs/VTAPE-API. Correct. What you want is my "file:" driver that sits on top of Marc's work. I should have it ready in a day or two. >Alexandre Oliva John R. Jackson, Technical Software Specialist, [EMAIL PROTECTED]
Re: Using Removable Hard Drives for Backup
On Dec 10, 2000, David Lloyd <[EMAIL PROTECTED]> wrote:
> Someone could write a device driver that made IDE drives look like tape
> drives :-P
Unless I misunderstand some recent contributions from Marc Mengel, it
seems that this is now quite easy to do. See docs/VTAPE-API.
--
Alexandre Oliva Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicampoliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist*Please* write to mailing lists, not to me
Re: Using Removable Hard Drives for Backup
> Hopefully some backup hardware manufacturer may in future sell sell a > system comprised of hot plugable disk mechanisms with little or no > electronics and a drive bay with the supporting electronics. The > economics of this look quite good at the moment. Any thoughts on this?? www.iomega.com
Re: Using Removable Hard Drives for Backup
Rod Roberts wrote: > > I have seen previous articles about using hard drives for backup by > tweaking the "reserve" percentage for the holding disk. I also plan to use a character device (magneto-optical drive) for dumps with AMANDA. Of course, writing a driver that makes a block device out of a character one (as suggested by David), or waiting for the DUMPER-API to come, might be solutions, but they do not work *now*. Here's what I came up with (and plan to implement): 1) Don't change anything, no multiple configurations, nothing such. 2) You have to have a tape drive (sorry Rod ;-) ) 3) The tapes capacity should be as large as your MO-disk's/CD-ROM's/whatever random access medium you choose. 4) The number of disk media should be exactly the number of your tapes. For best convenience, you should manually label them with the same names as your tapes (you can do this also electronically, by using the -L option to mke2fs, when you first create the filesystem on them ;-) ). Now, when you run AMANDA, you simply let *no tape* in the drive. This forces all the output (remember to tweak "reserve"!) to the holding disk. After the dumps are finished, you copy them from the holding disk to the disk medium. Then, you run amflush. Oh, nearly forgotten, the tape should have the same label as the disk you just used, so you'd better choose the disk according to the tape's name ;-) This solution has the advantage that the index database is correct for both the tapes and the disks. Also, you don't change anything in your configuration and just run AMANDA as usual. You don't have to "cheat" AMANDA either. You get the added result of tape backups, just in case your MO-disks/CD-ROMs/CD-RWs/DVDs got corrupted ;-) (you see here? the point of view has changed!). You are limited to using the same capacity for both types of media though (which leads to just using the minimum of both). This should get you running, until one of the other solutions becomes reality :-) -- Regards Chris Karakas Don´t waste your cpu time - crack rc5: http://www.distributed.net
Re: Using Removable Hard Drives for Backup
Tony Ross wrote: [...] > >Syquest: 44, 88 & 270 MB per medium ;-) > > Is that a typo? Did you mean GB? Many of the files I need to backup are greater than >270MB in size. No, it isn't - but they are really ancient... A Jaz can hold 2 GB per medium.
Re: Using Removable Hard Drives for Backup
>Date: Mon, 11 Dec 2000 07:25:47 +0100 >From: "Bernhard R. Erdmann" <[EMAIL PROTECTED]> >To: Rod Roberts <[EMAIL PROTECTED]> >CC: [EMAIL PROTECTED] >Subject: Re: Using Removable Hard Drives for Backup > >Rod Roberts wrote: >[...] >> Hopefully some backup hardware manufacturer may in future sell sell a >> system comprised of hot plugable disk mechanisms with little or no >> electronics and a drive bay with the supporting electronics. The >> economics of this look quite good at the moment. Any thoughts on this?? > >Syquest: 44, 88 & 270 MB per medium ;-) Is that a typo? Did you mean GB? Many of the files I need to backup are greater than 270MB in size. - tony --== Sent via Deja.com http://www.deja.com/ ==-- Before you buy.
Re: Using Removable Hard Drives for Backup
Rod Roberts wrote: [...] > Hopefully some backup hardware manufacturer may in future sell sell a > system comprised of hot plugable disk mechanisms with little or no > electronics and a drive bay with the supporting electronics. The > economics of this look quite good at the moment. Any thoughts on this?? Syquest: 44, 88 & 270 MB per medium ;-)
Re: Using Removable Hard Drives for Backup
Hmmm... Someone could write a device driver that made IDE drives look like tape drives :-P DL
Using Removable Hard Drives for Backup
I have seen previous articles about using hard drives for backup by tweaking the "reserve" percentage for the holding disk. I guess that I can also have my backup script write some king of label on the disk to prevent overwrites of the wrong disk. My question is, does this rotate the tape list, if not how do I cleanly get amanda to believe that that my backups made it onto a tape? Given the relative costs of a tape drive and a bunch of backup tapes versus a whole bunch of big cheap removable IDE drives, the latter option is looking very attractive. Are there any current directions in amanda development to provide support for this kind of setup? Hopefully some backup hardware manufacturer may in future sell sell a system comprised of hot plugable disk mechanisms with little or no electronics and a drive bay with the supporting electronics. The economics of this look quite good at the moment. Any thoughts on this?? -- -- Rod Roberts, (Lodbroker System Janitor^H^H^H^H^H^H^H Administrator) <[EMAIL PROTECTED]>
