Time Capsule Restore of iMac painfully slow

[whipit]

I have an iMac 21 inch 3.5 years old with 12 gig mem running OS X El Capitan.
Well it was working fine for over a week with the operating system upgraded and then suddenly I got the grey screen with progress bar when I rebooted and it just hung without progress bar movement for ages.
I started it with CMD+R option and ran disk utility and it ran fine ( no problems found), so after not rebooting normally a third time. I decided to rebuild my machine from the internet option after using CMD+R and then using also my restore data afterwards from my Time Capsule, but after many hours it eventually came to the point where it wanted to know what Apps and data I wanted to restore from my Time Capsule.
I selected what I wanted to be transferred and it started to transfer files.
Well it has been running for 12 hours now and the screen message tells me it will take another 21 hours 58 minutes at 2 MB/s.

What I wanted to know is why the heck is it so bloody slow, and is this normal for a rebuild using a wireless connected Time Capsule to transfer data.

The machine in question is the only one on my internal Airport network that normally runs at 35meg plus with several other devices.

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[harryb2448]

One reason of many I use cloning software on an external hard drive for backups.

 

[chscag]

What I wanted to know is why the heck is it so bloody slow, and is this normal for a rebuild using a wireless connected Time Capsule to transfer data.

Yes, that's normal for a restore using wireless. USB would be many times faster. I hope for your sake that your hard drive is OK after all that work. I don't completely trust Disk Utility because it can not check the hardware integrity of the drive, only its file and folder system structure.

 

[techiesteve]

As above. I always connect a time capsule via ethernet, faster but still slow. Last Friday a customer wanted to wait while I restored his TM backup to a new HD. After an hour it had settled down and showed 15.5 hours to go, he eventually decided to collect the next day.

 

[whipit]

Thank you all, for your replies.
I searched around last night to find a cable to connect my Time Capsule to my iMac , I found one and connected it and it restarted the transfer of data and as it was now only going to take 3 hours and x minutes so I went to bed and left it.
Well this morning I am using it to reply to this thread yippeeee iI'm so happy it all worked and I learned a lesson never to do a restore without a cable.

 

[whipit]

Would you believe it?

I was not able to see the left hand top of my title bar but could see time, date, network iCloud and others on the left so I thought, I know I'll shut down and restart.
Wrong! The original problem of the grey screen with Apple logo and progress bar not moving appeared again.I waited ten minutes but no progress so now restoring from my Time Capsule (with Cable) to a backup dated before this bloody EL Capitan and see what happens?