extremely slow backup in Yosemite

If the initial backup after an upgrade is over wireless.. it will stress the system.. you really should start a new backup.

The problem is OS has to index every file in the backup and compare it with what is currently in the OS. Over wireless you can expect biblical if not geological ages.

It is really better to start a new clean backups so no indexing is needed and no comparisons..

And ethernet of course.

On a MBA of course you will need to buy the thunderbolt to ethernet adapter.. a required purchase imho!!

Hey Pismo

I know exactly where your coming from.

After upgrading to Yosemite and trying to do a backup after 8 hours overnight only done 100MB of 250GB.

My system was slow also. I wiped the hard drive reloaded Yosemite clean and tried again, still the same.

I took the mackbook into a local specialist because I was worried about all my data, he backed up my system and luckily had a copy of Mavericks and we reloaded Mavericks reinstalled everything. I wiped my external drive and did a fresh backup and suprisingly the backup of the same 250GB took 2 hours.

I have Yosemite on a MBP (early 2011), and the backup time is abysmal. I use an external hard drive because I *thought* it would be faster than using the network. I started my first post-Yosemite backup on Friday night and abandoned it to go to work Monday morning. It had calculated that I needed 64GB backed up (a reasonable number, considering what I had done since the last backup about three weeks ago, when I upgraded to Yosemite. So this morning I reconnected my drive about three hours ago, and it's still "Preparing backup", even though I've been away from it about half of the three hours.

So how do I get all the sludge out of this process?

Same problem.

Mac (27 Zoll, Mitte 2011), OSX 10.10.1 (14B23), 2,7 GHz Intel Core i5, 16 GB 1333 MHz DDR3.

Hardware check Apple Retail Store MTZ 2014, Oct. No malfunctions.

Backup size 638GB.

Spotlight disabled.

"Virgin" Time Capsule (2TB) connected via ethernet.

Data rate (sent) varies from 1.5 KB/s up to 1.5 MB/s. (average 5KB/s).

Any solution available?

M.C.Schmidt wrote:

Same problem.

Mac (27 Zoll, Mitte 2011), OSX 10.10.1 (14B23), 2,7 GHz Intel Core i5, 16 GB 1333 MHz DDR3.

Hardware check Apple Retail Store MTZ 2014, Oct. No malfunctions.

Backup size 638GB.

Spotlight disabled.

"Virgin" Time Capsule (2TB) connected via ethernet.

Data rate (sent) varies from 1.5 KB/s up to 1.5 MB/s. (average 5KB/s).

Any solution available?

I cannot see anything clearly that is going to be problematic.

Turn off the wireless in the Mac.. so you can ensure all traffic is passed by ethernet.

Set IPv6 to link local only in the ethernet on the computer as this can also help.

Make sure the link speed is actually gigabit.. That is in the advanced on the ethernet section in network preferences.

Other than that welcome to Yosemite.. maybe the buggiest release ever from Apple.

@ Level 8: Thanks for your reply. Had these settings already set. Checked them again. No enhancement.

Bugs, bugs, bugs ...

My strong recommendation to people now is Carbon Copy Cloner (or similar but this one is good). And use a USB or faster external drive and make a bootable clone to begin with.. and you can even do sparsebundles to network location.

At least until apple fix the bugs.. and even after they do.. or more likely release the next version.. so you never have to fix them.. you just do the MS trick and release a new OS every 12months. You will still find CCC offers huge benefits over TM.. not least is it works.

I have the same problem since upgrading to Yosemite: extremely slow backups whether using USB 2.0 or Thunderbolt. Thunderbolt is normally, well, lightning fast, but since the upgrade to Yosemite it is so slow as to be impractical to use. USB 2.0 is no different. This looks like a software bug. I am considering a roll-back to avoid loss of data.

And I'm on an MBAir with SSD so it's not read time. Anyone from Apple care to comment?