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Time Machine backup very slow in Lion

After installing Lion Time Machine backup (not initial one which is long by default) takes about 40 minutes vs. about 5 minutes in Snow Leopard. Very annoying because it slows down my entire system for such a long time. Any help, please?

Mac mini, Mac OS X (10.7)

Posted on Jul 20, 2011 12:10 PM

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488 replies

Jul 20, 2011 12:46 PM in response to petewaw

petewaw wrote:


As mentioned in my first post it is not the initial backup but second, third etc. Same type of backup took only about 5 minutes in SL.

Has Spotlight finished indexing all your drives (see if there's a tiny dot in the icon at the right of your menubar)?


If not, that's at least part of the problem.


If it has finished, try a Restart.

Jul 20, 2011 9:01 PM in response to Pondini

Here is a log copied from Time Machine Buddy:


Starting standard backup

Backing up to: /Volumes/Time Machine/Backups.backupdb

2.20 GB required (including padding), 126.68 GB available

Copied 394 files (0 bytes) from volume Pete 02.

Copied 173985 files (861.6 MB) from volume Pete 01.

1.13 GB required (including padding), 125.79 GB available

Copied 13 files (0 bytes) from volume Pete 02.

Copied 158965 files (90 KB) from volume Pete 01.

Starting post-backup thinning

No post-back up thinning needed: no expired backups exist

Backup completed successfully.


No additional messages, perfect backup, no need for thinning and it took 45 minutes, almost 10 times slower then in Snow Leopard (same TM preferences, exclusions etc).

Jul 20, 2011 10:12 PM in response to Pondini

No, I'm not on SSD yet. I don't use anti-virus.

Generally - all my configurations are exactly the same as in Snow Leopard the day befor Lion upgrade so I think the problem is on Lion's side but I can't figur out where.

Now I'm observing Time Machine preferences window while performing backup - extremely slow and it runs twice (!?) - first about 350 MB and then about 1,2 MB but also very slow comparing to previous system.

Time Machine backup very slow in Lion

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