Migrate OS to smaller drive?
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From: thib on 11 Apr 2010 17:20 Sjoerd Hardeman wrote: > I thought symlinks keep point via a file location memo, like "look at > /usr/share/the/file/you/want", which is the old location just after > copying, but the new location when you boot from your new device and > that becomes root. A tool that tries to be too smart could try to relocate it. Not sure how it would work out though; you'd probably have to be inside the new system, copying files from the old one, and not the other way around. -thib -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4BC23C70.60108(a)stammed.net
From: Ron Johnson on 11 Apr 2010 18:10 On 2010-04-11 15:53, Clive McBarton wrote: > > Ron Johnson wrote: >> Hah. Speeding up transfers is more likely, since the wire is always the >> bottleneck, and compression means it will be carrying "more bits per bit". > > There's no mention of wire transfer anywhere in this thread, and in fact Yes, "wire" is slang for network cables, but SATA cables are actual wires too and orders of magnitude slower than CPU/RAM transfer. -- Dissent is patriotic, remember? -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4BC24655.80001(a)cox.net
From: Ron Johnson on 11 Apr 2010 18:30 On 2010-04-11 15:54, Sjoerd Hardeman wrote: > Ron Johnson schreef: >> On 2010-04-11 08:11, Clive McBarton wrote: >>> Sjoerd Hardeman wrote: >>>> mount the new device (mount -odev /dev/newdevice), and do a >>>> rsync -ax / /media/newdevice. >>> What exactly is the advantage of this approach over "cp -a" or "mv"? >>> >>> I would have suggested mv. It has the useful property that you can >>> easily spot aborted transfers by the fact that the original device is >>> not empty afterwards. >> One note is that I've had issues where symlinks remain pointing to the >> old drive. (That was a long time ago, though, and maybe I did something >> wrong.) > I thought symlinks keep point via a file location memo, like "look at > /usr/share/the/file/you/want", which is the old location just after > copying, but the new location when you boot from your new device and > that becomes root. > Note how at the bottom or this example bar/shoe still points to .../snuffle/shoe/. When you try to "cp -axv / /some/new/root" the same thing will happen. In /usr/bin all the symlinks to /etc/alternatives will still point to the *current* /etc/alternatives not to /some/new/root/etc/alternatives. $ mkdir foo/snaggle snuffle/shoe $ cd foo $ ln -sf ../snuffle/shoe . $ dir total 44 drwxr-xr-x 3 me me 4096 2010-04-11 17:12:44 ./ drwxr-xr-x 206 me me 36864 2010-04-11 17:12:04 ../ lrwxrwxrwx 1 me me 15 2010-04-11 17:12:44 shoe -> ../snuffle/shoe/ drwxr-xr-x 2 me me 4096 2010-04-11 17:12:04 snaggle/ $ cd .. $ cp -av foo bar `foo' -> `bar' `foo/snaggle' -> `bar/snaggle' `foo/shoe' -> `bar/shoe' $ dir bar total 44 drwxr-xr-x 3 me me 4096 2010-04-11 17:12:44 ./ drwxr-xr-x 207 me me 36864 2010-04-11 17:13:54 ../ lrwxrwxrwx 1 me me 15 2010-04-11 17:12:44 shoe -> ../snuffle/shoe/ drwxr-xr-x 2 me me 4096 2010-04-11 17:12:04 snaggle/ -- Dissent is patriotic, remember? -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4BC24B54.5060804(a)cox.net
From: thib on 11 Apr 2010 20:00 Ron Johnson wrote: > Yes, "wire" is slang for network cables, but SATA cables are actual > wires too and orders of magnitude slower than CPU/RAM transfer. This is true, but isn't relevant to what you suggested. Think about it some more. .... Oh yes. We'll never talk about this again, I promise. -thib PS I'll tell you something embarrassing about me if you find a SATA controller that can inflate. -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4BC26019.4080403(a)stammed.net
From: Ron Johnson on 11 Apr 2010 20:40 On 2010-04-11 18:49, thib wrote: > Ron Johnson wrote: >> Yes, "wire" is slang for network cables, but SATA cables are actual >> wires too and orders of magnitude slower than CPU/RAM transfer. > > This is true, but isn't relevant to what you suggested. > Think about it some more. > > ... > > Oh yes. > > We'll never talk about this again, I promise. > > -thib > > PS I'll tell you something embarrassing about me if you find a SATA > controller that can inflate. > You're absolutely correct. This time... -- Dissent is patriotic, remember? -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4BC26996.9030308(a)cox.net
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