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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

Aug 2, 2011 10:49 AM in response to Daniel Wieder

Daniel Wieder wrote:


I agree with everyone that backups are now painfully slower under Lion, for some reason.

This thread has gotten unmanageably long; but not everyone is seeing that, and those who are have found a variety of the usual causes, plus in a relative few cases, an indexing problem of some sort that does seem new with Lion, mostly on network backups.


What are you backing-up to?


Aug 2 10:34:16 MacbookPro com.apple.backupd[914]: Waiting for Spotlight to finish indexing /Volumes/Time Machine Backups/Backups.backupdb

Aug 2 10:35:16 MacbookPro com.apple.backupd[914]: Waiting for Spotlight to finish indexing /Volumes/Time Machine Backups/Backups.backupdb

You do seem to have some variety of an indexing problem.


Start by repairing your backups, per #A5 in Time Machine - Troubleshooting.


If that doesn't help, you might want to try deleting the index, as in my previous post.

Aug 3, 2011 1:13 AM in response to Pondini

Pondini wrote:


Georg Portenkirchner wrote:


Verifying and repairing my external backup drive took more than 16 hours.

Just for future reference, there's no point to running the verify; if a problem is found, that all has to be done again by the repair. Just run repair.


Anyhowk glad it's sorted out! 🙂


That's what I did, only ran the repair process to verify and repair the disc. That took so long.

Aug 3, 2011 7:54 AM in response to Georg Portenkirchner

Your logs get "rotated" periodically (usually at 12:30 am local time). If you're looking in a new, current log, and no backups have run yet, you won't find any messages there; they'll be in the previous, archived, logs.


See #A1 in Time Machine - Troubleshooting for a widget that will extract the messages from the current and previous archived log. If that does't work, see the pink box there -- it shows how to use Console to look at the previous logs.

Aug 3, 2011 8:00 AM in response to Pondini

I followed these instructions. Thanks for posting them and maintaining your great Time Machine FAQ.


I had to eject the Time Machine Backups volume and then remount it (which behan indexing and creating a new .Spotlight-V100 immediately) in order to empty the trash contining the original .Spotlight-V100 folder. Attempting to empty the trash before ejecting resulted in many, many, many reports of "item in use / unable to empty trash".


The first backup, which I performed manually with autobackups still turned off, took a while to index but the rest of the process was fast. But - and this is important I think - the volume did not dismount itself when the process was complete; it remained on my desktop.


I just restarted my iMac and turned autobackups back on. I'll report back here in this subthread with the results of subsequent automatic backups.

Aug 3, 2011 9:13 AM in response to Pondini

First automatic backup took about 18 minutes from mounting of the Time Machine Backups volume to completion. The Time Machine Backups volume did not dismount when the backup process was complete.


Boot volume is 228gb free out of 445gb total. Time Machine Backups has backups going back to April 2010 (so about 16 months worth) and is 526gb free out of 998gb total. About 60mb was backed up during this first "automatic" run following the repair/reindexing/first manual backup.


So... 18 minutes isn't terrible, but it still shouldn't take that long. I don't much care, though, since that happens in the background without bothering me. I would like to see the Time Machine Backups volume dismount when the backup is complete, unless there's a good Lion-y reason for it to not be doing so.

Aug 3, 2011 11:38 AM in response to David Bedford

It's not my first Lion backup. I downloaded Lion the day after it came out. At first the backups were very long and would not eject after. Then I messed around with it a little and they were fast again for a day but yesterday they were slow as before. Now they are super fast. I'm guessing tomorrow they'll be slow again. I use wireless with my Time Capsule.

Aug 3, 2011 12:02 PM in response to kevin10451

I have the same issue but have potentally noticed the problem I just dont know how to fix it.


I have followed the instructions and deleted the Spotlight-V100 in the time machine sparsebundle which all works fine I do a back up and again no problem. 🙂


It has been working fine backing up ejecting all mundane however when it feels like it 2 hidden files are created on the Backups.backupdb folders which are .spotlight_repair and .spotlight_temp the folder appear to stop the drive from ejecting


this is a copy of my log that is a usb drive connected from the Airport



Starting standard backup


Attempting to mount network destination URL: afp://Steven@Base%20Station%20aecf91._afpovertcp._tcp.local/TIME%20WARP%20500

Mounted network destination at mountpoint: /Volumes/TIME WARP 500 using URL: afp://Steven@Base%20Station%20aecf91._afpovertcp._tcp.local/TIME%20WARP%20500

QUICKCHECK ONLY; FILESYSTEM CLEAN

Disk image /Volumes/TIME WARP 500/My MacBook.sparsebundle mounted at: /Volumes/Time Machine Backups

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

100.0 MB required (including padding), 148.53 GB available

Waiting for index to be ready (100)

Copied 1439 files (9.7 MB) from volume MacBook HD.

100.0 MB required (including padding), 148.53 GB available

Copied 1351 files (1.1 MB) from volume MacBook HD.

Starting post-backup thinning

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

Backup completed successfully.

Waiting for Spotlight to finish indexing /Volumes/Time Machine Backups/Backups.backupdb

Waiting for Spotlight to finish indexing /Volumes/Time Machine Backups/Backups.backupdb

Waiting for Spotlight to finish indexing /Volumes/Time Machine Backups/Backups.backupdb

Waiting for Spotlight to finish indexing /Volumes/Time Machine Backups/Backups.backupdb

Waiting for Spotlight to finish indexing /Volumes/Time Machine Backups/Backups.backupdb

Waiting for Spotlight to finish indexing /Volumes/Time Machine Backups/Backups.backupdb

Time Machine backup very slow in Lion

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