On Tue, Nov 28, 2017 at 10:58:25PM +0000, Sitsofe Wheeler wrote:

I'd like to nominate f1c635b439a5c01776fe3a25b1e2dc546ea82e6f
(https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/scsi/storvsc_drv.c?id=f1c635b439a5c01776fe3a25b1e2dc546ea82e6f
) to be backported to 4.4 stable because it looks like without it
passthrough SSD disks won't work and will generate faux devices. It is
also being carried by Ubuntu:
http://kernel.ubuntu.com/git/ubuntu/ubuntu-xenial.git/log/drivers/scsi/storvsc_drv.c?h=Ubuntu-4.4.0-98.121
along with other Hyper-V patches in their 4.4 tree.

I'm not 100% sure that this one will fix what is being seen but I'm
coming to this conclusion based on
https://bugs.launchpad.net/ubuntu/xenial/+source/linux/+bug/1679898/comments/144

Can you test it to determine if this really does what you think it does
to solve the problem?  The changelog text makes it seem not necessary at
all.

thanks,

greg k-h