AU-My External is now "Unallocated Space"

I clean installed the anniversary update on my desktop. I have a 32GB flash drive that works fine (Autoplay, Disk Management, This PC). However, my External 750GB Toshiba HDD shows absolutely nothing. No Autoplay, it doesn't show up in This PC, and looking in Disk Management it just shows the whole drive as unallocated space (So i can't just assign it a drive letter and go). However if I plug it into my laptop which is still running 1511, it shows up fine and I can see everything I have on it. So this is one of those few times where I am at a loss as to what I can do to fix this?

I mean I guess for now I can move files to the Flash Drive and then onto my desktop if I absolutely need them but that is going to get old fast :P

With the Toshiba unplugged, you can try to access device manager> select show hidden devices> and delete the old (greyed-out) Toshiba appearances there. There should be one appearance in portable devices and one in the USB section that are greyed-out. Once done, try plugging it back in to see if it might be properly rediscovered.

its seems im not alone

HDD undetected Bug in 1607 still appear, perfectly fine on 1151

1151 perfectly fine HDD

Attachment 94231

1607 bugged hdd dissapear ISSUE

Attachment 94232

RIP anniv update

EdTittel said:

Do you have access to another drive you can plug into the caddy? If so, you can use it to determine if the problem is with the drive, or with the caddy itself. From your symptoms, it's possible there might be a driver issue on your desktop machine in accessing the caddy. If, however, another drive comes up OK, then the issue may be with the drive. In that case, you could try copying the data from the problem drive to a working drive and keep rolling forward that way, if no easy diagnosis/fix is available to figure out what's wrong with the access from the desktop to the Toshiba 750 GB drive.
Windows can be vexing at times -- and this sounds like one of those times -- but you can almost always find a workaround (good) or a fix (better) if you keep at it.
Good luck!
--Ed--

I highly doubt there is a problem with the drive. If there was, it wouldn't have worked on the desktop before I installed 1607, and it wouldn't still work on my laptop right now. (I literally JUST moved some files over to the 32GB sandisk, then moved them from there to the desktop.

aardvark said:

With the Toshiba unplugged, you can try to access device manager> select show hidden devices> and delete the old (greyed-out) Toshiba appearances there. There should be one appearance in portable devices and one in the USB section that are greyed-out. Once done, try plugging it back in to see if it might be properly rediscovered.

I gave that a try, no dice. What is interesting is that the driver it uses is the one packaged with 1607:

So I'm gonna go ahead and say Microsoft botched the driver

This problem is all over the place (I've been searching around for a while now, technet, reddit, techradar, tomshardware, etc), I guess we just have to wait for microsoft to push a fix. IN the mean time I'm glad I haven't bumped my laptop up to the AU yet

For the record, I have a Samsung 840 EVO SSD plugged into a USB3 caddy and it works using the same driver as yours. Is your drive in question one of those specialized Toshiba Canvios by chance? Or is it a standard hard drive?

aardvark said:

For the record, I have a Samsung 840 EVO SSD plugged into a USB3 caddy and it works using the same driver as yours. Is your drive in question one of those specialized Toshiba Canvios by chance? Or is it a standard hard drive?

Just a standard Hard Drive. And from reading various articles around the web it is really hit and miss (Some drives work, Some drives are seen and have a drive letter but don't work, Some drives like mine are just unallocated space until plugged into a 7/8/8.1/10-1511 machine).

Carsomyr said:

Just a standard Hard Drive. And from reading various articles around the web it is really hit and miss (Some drives work, Some drives are seen and have a drive letter but don't work, Some drives like mine are just unallocated space until plugged into a 7/8/8.1/10-1511 machine).

Sure seems that way. Good luck with your issue!