VM freezing....anyone know why?

My environment is four HP servers with 256 GIG RAM in each server, 20 cores each server and 6TB internal storage on 15K RPM SAS drives, all running Windows 2012 R2 and a Windows 2012 R2 Domain.  Hyper-V is the Hypervisor and each host runs two to three VMs.

One of my VMs is a Windows 2003 server and it is a file servers for the staff of a school district.  The VM is given 8 gigs RAM and 4 cores and it has a C: drive and an E: drive.  The E: drive holds the data.

About every three days or so (it's random) the servers sort of freezes and users can no longer access the network shares.  All they get is a spinning mouse and their files will not open.  When I check resources, the RAM, proc, disk usage and NIC are all excellent.  I can detect NO load on the machine at all.  However, every few days, I still get the "freeze" and users cannot access shares.  The only fix I have thus far is to reboot, and it takes FORVER to reboot.  

I have looked at this a few times and cannot determine why it's freezing.  Can anyone suggest some places to start looking?


Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

JohnBusiness Consultant (Owner)Commented:
It could be many things including a damaged operating system. Try running System File Checker (SFC /SCANNOW from an admin command prompt).

Does the primary drive for the virtual server have enough disk space? Running out of disk will do this.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
crp0499CEOAuthor Commented:
John, you replied so the points are yours.  I found that an end users was running SQL backups from within an application on SLQ files of 30GB.  All SQL backups exactly corresponded with the times the shares went offline.  I'm adjusting the SQL backup times to off hours.  :)
JohnBusiness Consultant (Owner)Commented:
Thanks for the update and I was happy to point you in the right direction.   Thank you.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Windows Server 2012

From novice to tech pro — start learning today.