Possible to compress a TM backup file?
in [Mac Systems]
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From: J.J. O'Shea on 29 Mar 2010 22:18 On Mon, 29 Mar 2010 17:15:55 -0400, Michelle Steiner wrote (in article <michelle-479F6C.14155529032010(a)nothing.attdns.com>): > In article <tom_stiller-5DE6D3.16571729032010(a)news.individual.net>, > Tom Stiller <tom_stiller(a)yahoo.com> wrote: > >> Where did you read that? The only compressed TM files on my machine are >> those that were compressed before TM made the backup. > > If you're backing up to a Time Capsule (or network storage device, I think, > as well), the backup is a sparse disk image; if you're backing up to a > directly attached (USB or Firewire) device, the backup is individual files. > > That's what I thought. -- email to oshea dot j dot j at gmail dot com.
From: nospam on 29 Mar 2010 22:20 In article <horn0302tkm(a)news4.newsguy.com>, J.J. O'Shea <try.not.to(a)but.see.sig> wrote: > Isn't the sparse image compressed? no.
From: J.J. O'Shea on 29 Mar 2010 22:29 On Mon, 29 Mar 2010 22:20:28 -0400, nospam wrote (in article <290320102220284377%nospam(a)nospam.invalid>): > In article <horn0302tkm(a)news4.newsguy.com>, J.J. O'Shea > <try.not.to(a)but.see.sig> wrote: > >> Isn't the sparse image compressed? > > no. My error then. It's still a damn stupid thing to try. If he wants to compress the backup, use a backup system that does that automatically. Retrospect, for example. -- email to oshea dot j dot j at gmail dot com.
From: Mark Conrad on 29 Mar 2010 23:33 In article <290320101520212552%aeiou(a)mostly.invalid>, Mark Conrad <aeiou(a)mostly.invalid> wrote: > > If that is what you are going to do, why don't you > > just use gzip and tar? They won't give you any > > confusing error messages. You'd want to > > use options that preserve all the various bits of > > information. [Of course like any backup scheme - > > test to make sure that restore works.] > > That sounds good at least for gzip. I tried gzip on regular files, works great, however I could not get it to work on the TM file, despite trying all the gzip options such as -r (recursive) gzip kept complaining that the TM file was not a regular file. <g> Oh well... Mark-
From: nospam on 29 Mar 2010 22:40
In article <hornm832tkm(a)news4.newsguy.com>, J.J. O'Shea <try.not.to(a)but.see.sig> wrote: > >> Isn't the sparse image compressed? > > > > no. > > My error then. It's still a damn stupid thing to try. If he wants to compress > the backup, use a backup system that does that automatically. Retrospect, for > example. i've seen instructions on how to get time machine to use an encrypted image (which time machine should do on its own, there's no excuse for that), so it's probably possible to get it to use a compressed image. it's still a stupid idea to bother with compressed since disks are so cheap. |