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How long to transfer files at Thunderbolt 2 speed?

I have just bought a MacBook Pro and want to migrate 350 GB of data from an earlier laptop..

Using the Thunderbolt 2 connection between the two laptops, how long should it take to migrate the data?

This wil explain it all:

Thunderbolt gives you two channels on the same connector with 10Gb/s of throughput in both directions. Ultrafast, ultraflexible Thunderbolt 2 pushes that to 20Gb/s. You can move data to and from peripherals up to 40 times faster than with USB 2 and up to 25 times faster than with FireWire 800.

 

 

Source: https://www.apple.com/thunderbolt/

Thanks for your swift response.. but because I get all those many zeros confused.... How long will it take to transfer 350 GB of data at the rate of 20 Gbps?

20 Gbps is equal to 2.5 GB/s

You have 350 GB to transfer, so we will divide 350 by 2.5.

350 / 2.5 = 140, so it will take you 140 seconds, that not even three minutes.

I think it is too much optimistic

It depends on the kind of device the old Mac has. If it is a traditional HDD, transfer rate can at best be around 150MB/s and maybe less.

Thanks you for your help. I will post the findings... will migrate 350 GB of data from old MacBook Air to new MacBook Pro using Thunderbolt 2 cable.... in THEROY, yes, should be less than a 3-minute transfer... but I am sure there will be hiccups, etc. Look to this space Thursday for the answer!

The MacBook Air SSD can reach, I'm guessing, no more than 300-400MB/s. It also depends on which MBAir generation it is.

The Thunderbolt 2 20Gbps bandwidth is limited by the slowest bandwidth of the source drive.

Thanks for the feedback. So, based on THEORY, and comments above, I may migrate my data (350 GB) from my older laptop to the newer one in a space of time that could be as little as 2 minutes.. or as long as 30 minutes (roughly).

Either beats the 35 continuous days it took to upload 78,000 photos into the iCloud, using an upload speed that is so low that numerically in kbps it could represent the IQ of a registered voter in Iowa.

Look to this space Thursday, once I've conducted the transfer and we'll all know how long the data migration took.

Indeed, you're right. The process will take at least ~ 2.5 minutes, depending on the specifications of the hardware the cable is plugged into.

Okay helpers -- we were all wrong!

I bought a Thunderbolt 2 cable and migrated the 350 GB of data in my 2013 MacBook Air into my new MacBook Pro... and we all thought the process would take just minutes... but the fact is, data can only move as fast as the slowest impediment in the linkage... and I think the SSD in the MacBook Air is actually a speed bump in the process. Because I was only able to achieve speed rates of 40 MB/s for the transfer.

As such, I migrated all the data (350 GB) to the new laptop in 1 Hour and 40 minutes.

That's NOT exactly in the seconds, or minutes, some of you suggested.Perhaps this information will be helpful for someone else.

In the meantime, thanks, folks, for making your suggestions.

Happy new Year to all of you.

I just migrated 401GB from my Late'11 15" MBP with 16GB RAM and 750GB/7200RPM HDD to a new Mid'15 15" MBP with 16G RAM and the latest generation PCIe 512GB SSD. Took a tad under 3 hours with Thunderbolt and that was TBolt1 since the old MBP has not an inkling of what TBolt2 is. Did it twice, once with the Setup Manager that runs at First Start, later I erase, reinstalled the OS from scratch and redid the migration using Migration Manager. As per the progress reports, the fastest it got was 72 MBps, but most of the time hovered around 40-50, depending on what it was moving across. At times, transfer rates went down to as low as 4MBps. And consider that the old MBP has a mechanical drive, vastly slower than the new SSD that is one of the improvements that came with the Mid'15 15" top-end models.

Be sure to WAIT till it finishes. That includes when it reboots, comes back up, "finishes" the migration and finally gives you the desktop.

BTW, discovered that the OS you're moving from does matter. First migrate with Setup Manager was from 10.7 Lion, upgraded the old MBP to 10.11 El Cap. With Lion, migration took just under 4 hours, 3 hours with ElCapitan. The new MBP comes with ElCap from factory.

最后更新：2017-10-22 11:31:14

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