Disk issues on Hyper-V

[Lassi Kortela]

Sorry, I missed this part of your message:

> I also tried switching the disk from the IDE controller to the SCSI controller, but when I did that, dragonfly couldn't see the disk any longer. 

I'm not familiar with Hyper-V, but if it emulates several different 
types of disk controllers it's best to try them all. VirtualBox has 
about 10 different types; one that worked for me was AHCI.

When virtualizing, heavy load on the host computer may cause dropped 
packets in some situations. Some OSes / disk drivers are a lot more 
sensitive to it than others. I've had a lot of problems emulating recent 
versions of NetBSD and if I run it side by side with another virtualized 
machine, there are tons of I/O errors due to timeouts or stalled reads. 
I don't recall having such problems with DragonFly, but if nothing else 
works and you tend to have high CPU/disk load, it's worth trying to 
reduce all other activity on the host computer and see whether the 
timeouts still persist.