weird behavior of external disk

Thank you for your fast reply, Jan. - Today, the disk seems to work when I plug the cable directly into the Mac Pro. Strange, I thought I had tried this also before I asked, just did not mention it. The connection of the USB3 end of the cable to the disk seems pretty unstable, it is easy for the rather stiff cable to lever the plug to one side. I will asap try to buy another cable and see what happens. Changing the enclosure will not be possible, since it is in one unit with the disk.

Thanks again! - Hening.

Hi rccharles, thank you for your suggestion. But to be honest, this looks like a lot of fiddling, I don't look through it. And I really can't see how the enclosure I have could be taken apart. And if I need to take it to a craftsman first ... well I think it will be both cheaper and easier to buy a new enclosure and disk if a new cable doesn't cut it. Fortunately, hard disk space is not SOO expensive these days. Maybe next time I'll make sure to buy an enclosure where disks can easily be plugged in.

Thanks again! - Hening

Thank you for chiming in, Eric. The trick did not work for me, but then, in my case, there was no migration involved. And the problem is new to me, the same configuration has worked earlier. Also, it is strange that the problem seems to be gone if I plug the connection cable directly into the Mac rather then via a hub. I think I try a new cable and see what happens.

Well the socket on the Mac is just 2.0. Also, this has been fast enough so far - I hope a new cable will fix it; if not, I'll try a new drive, since I have the impression that the socket on the enclosure is worn out.

That is informative. My drive is at least 5 years old. So if a new cable does not cut it, I'll buy a new drive.

Hi!

Just for your information: I have now pinned down the problem to the power supply of the hub.

Thanks to you who tried to help! -