Two MacBooks, 10.11.4, a fast Time Machine backup and a very slow

In our office at home, connected to a Gigabit ethernet on the same switch network, we have two MacBooks.  One is a 2011 MBP with a 1 TB SSD (third party), and is an MBA in 2015 with a 512 GB SSD (Apple).  A Linux server on the same network running Netatalk 3 providing the backup network drives, one for each laptop. The two TImeMachine network drives are on the same physical server drive.  Two laptops running 10.11.4 and darn are configured almost identically.  Neither laptop has no trouble finding the network backup drives, and they begin to run backups without problem.

The old MBP was a workaholic and functioning flawlessly for years, including the fast and regular Time Machine backups. File unique restorations are done with some regularity, and they always worked (I don't think that once done, we use a complete restore of the system from scratch, and it worked).

The new MBA, in contrast, had endless questions from and complementing the backups.  Last night, for example, I decided to simply reformat the drive on the server where there is a material error affecting the MBA (I ran Linux fsck to check the file system before you wipe it off and he's found no errors) and resumed full backups on two laptops.  The MBP has about 600 GB for the first backup, and complete the backup in about 5 hours.

MBA, with about 350 Go back up, was still underway this morning and had less than half the backup is finished. In the console log, he showed he was backing about 5 GB/hour.  Not only that, but the incremental backups took a lot of hours (more than overnight), making it impossible to never complete because it must be packed and taken to work at some point in the morning.  I.e. backups are all simple broken on this MBA.

The MBA connects to the network with a third USB3 (Anker) hub that has a Gigabit Ethernet port on this subject.  I downloaded iperf for Mac and Linux server and found that this is right about 900 Mbps throughput, so I expect an optimal bandwidth is achieved in this regard.

Any ideas what might be happening here?  Diagnosis between the two to see what could be such a radical difference? Tried to change taps the network wiring/switch problems, without change. Reset, no change.

We have two other Macs also running backups in this way, under 10.11.4,, and they were also without problem. Also is it just that an MBA, the most recent of the bunch, problems.

A third-party file server is unsuitable for use with Time Machine, especially if it's your only backup. I know that's not what you want to hear. I know that Time Machine accepts the device as a backup destination. I know that the developer says the device will work with Time Machine, and I also know that it usually seems to work. Except when you are trying to restore and find that you can't.

Apple has published a specification for network devices that works with Time Machine. No third party provider, AFAIK, does meet this specification. They all use the application of Netatalk incomplete, obsolete Apple Filing Protocol.

Apple does not endorse any device third-party network for use with Time Machine. See this support article.

Network backup, use as destination an Apple Time Capsule or an external storage device connected to another Mac or a 802.11ac AirPort base station. Only 802.11ac base stations support time Machine, not older model.

Otherwise, use Time Machine at all. There are other ways to save, although none of them are nowhere near as effective or as well integrated with OS X. I don't have a specific recommendation.

If you are determined to continue to use the device with Time Machine, your only remedy for any problems that result is for the developer (who will blame Apple, neither you nor anyone else but herself.)

Tags: Mac OS & System Software

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