Hyper-V Program Manager
Over the weekend I reconfigured one of my main servers. As part of this process – I had to make some large fixed virtual hard disks (800-1600GB in size). This took a long time…
I spent quite some a while looking at this screen…
In the past I have talked about why this takes a long time and I have also talked about a tool that is available that can make fixed virtual hard disks quickly. So you may be wondering why I would still create virtual hard disks the slow way.
Well – there are two reasons:
In my opinion – when it comes to production systems, sometimes it is just worth taking the time to do things properly.
FYI: A slow format just calls VERIFY10/16 on every sector. It doesn't even write data... At least, that was the case when I last checked.
Simon - correct, but a slow fixed VHD creation does write to each sector.
I would agree to the argument in favor of reliability. If this is taking a long time does it make sense to make it something running in the background? So as an admin I can put requests in to prep these monster vhd's in advance and check back on the status from time to time. Given the version of Hyper-V is going to support larger disks this is only going to take even longer ;-)
The Hyper-V UI is all WMI driven, I use a back door to create all of the disks, and you can run this overnight, etc. ahead of time, instead of waiting for the VM Wizard to do the work.