Comment 23 for bug 1332722

Resolved:

Bad usb 3 external enclosure or enclosure is a 'win' device.

I have now stopped the issue by finding an external usb 3 enclosure that does work.

So either:
a) My enclosure is flaky as hell.
b) My enclosure is a 'win' device.

It is an Innostor. I only paid $8 on ebay for it.
That might say it all.

I have seen my fair share of cheap chinese devices over the years that do not meet standards and employ various tricks that make these cheap devices work in Windows and no other OS.
For those who posted and were using a Western Digital external drive, might be a 'win' device issue also.

Thanks for all of the help.
I learned a lot about things like IOMMU and other things.

Hardware issues are damn hard to diagnose.
It looks like software so much of the time.

BTW:
In order to even use the other usb 3 enclosure all of my drives have to be reformatted.
Anything formatted by the Innostor cannot be seen by the other enclosure.
However, after reformatting the drives now work.