100% SSD disk usage when running Hyper-V

[james73]

ASUS Z97-A mobo, i5-4670, 32GB RAM, Windows 10

Boot drive: 1TB SSD

Data drive(s): 2 x 2TB SSDs in RAID1


Back in March, one of the HDDs in the array reported a fault so I replaced both of them with SSDs. No problems, everything worked fine and is a lot quicker.

Except Hyper-V. The VMs are hosted on the RAID array (as they were when I still had HDDs in the array). Now when I'm running Hyper-V I often get 100% disk usage on the array. This slows the the VMs down to a crawl and is somewhat annoying, to put it mildly. It doesn't last for the entire time I connect to the VMs but it does happen often.

Any tips, anyone?

 

[Mujja]

Haven't run a VMs on SSDs in RAID.

Something to try, disable automatic checkpoints (on by default) and see if that helps.

Move one of the VHDs to the boot SSD and check for same issue.

If the RAID array is used for more than just VMs, add a PCI-E to NVMe adapter and move your VM Boot\OS VHDs to the NVMe.