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Monthly Archives: January 2019

2012 R2 Hyper-v VM delete empty VM disk to free space for the host?

I have a VM that has a 1.5TB empty disk volume that I want to remove and have the space go back to the physical host.

I think the correct steps would be to first use Disk Management in the VM to Delete Volume and then Hyper-V Manager to remove it from the VM itself.  

Can anyone confirm these steps?

Thanks!

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Accessing virtual machines from the Internet

Good evening,

I have a dedicated server with 2 IP addresses assigned on one NIC. Server is hosting a Hyper-V Role with few VMs installed. I would like to know how can I configure a Hyper-V Switch (or roles on the main server, if needed) to access a VM from the Internet
using one of the assigned IP addresses (the second one would be for RDP connections to the main server).

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Hyper-V Cluster iSCSI issues

Greetings all. I have a customer with a two node Server 2016 Hyper-V cluster. System was installed in Dec 2017 and ran fine for probably 7 to 8 months when we began experiencing issues. Hosts are identical Dell R830s each with two dual port QLogic 57810
10Gb adapters. The adapters are using DAC cables to connect to the respective ports of an EMC Unity 300 SAN. Each adapter has one copper cable going to one port of a storage processor on the SAN as depicted in the attached JPG.

The hosts were recently updated with the latest firmware, drivers, and OS updates for server 2016 in an attempt to rectify the intermittent iSCSI timeouts we’re experiencing.

Users began noticing that VMs will sometimes "freeze" or become un responsive for a minute or two and then resume. We occasionally get application level errors about I/O that completed but "took an abnormally long time".

The Windows system event log will often record iSCSIprt errors event ID 9 that the "Target did not respond in time for a SCSI request".

We get these on both hosts and to two different LUNs on the Unity. Typically the events occur in bursts all with the same timestamp and sometimes a few events are recorded and sometimes dozens.

Since everything has now been updated to the latest available firmware and drivers we’re not sure where to go from here. MPIO is installed on the hosts but the targets were not configured for MPIO because there is no switch in the mix. These hosts are direct
connected to storage.

If anyone has seen behavior like this or has a suggestion for additional troubleshooting I’d welcome your comments.

Thanks.

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Hyper-v Server 2016 Standalone – High Availabity

If this has been posted please redirect me.

I have two identical Dell Poweredge Server with Hyper-v Server 2016 as the OS. I would like to configure High Availability, and not have a GUI is a bit of a challenge.

I am curious to know if anyone could point me to resource to help me accomplish this task.

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Hyper-v Server 2016 Standalone – High Availabity

If this has been posted please redirect me.

I have two identical Dell Poweredge Server with Hyper-v Server 2016 as the OS. I would like to configure High Availability, and not have a GUI is a bit of a challenge.

I am curious to know if anyone could point me to resource to help me accomplish this task.

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Win10 Hyper-V host with SMB shares – not available behind external switch.

I have a Win10 machine, enabled Hyper-V and built a VM.  Used external switch to get networking to the VM, but now my SMB shares on the Host cannot be reached from other computers on my LAN.  Any ideas?

I can get to my own shares, using the "internal" IP address on "this side" of the switch.

I am guessing this would also be the case if my VM happens to add shares.

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After resolving a ransomware problem, Hyper-V wont connect with VM’s/

The error message in the manager is "You might not have the permissions to perform this task"  How can I repair the manager to allow me to connect to my vm;s?  In Windows 2012 I uninstalled and reinstalled Hyper-V manager and it seemed
to fix the problems.

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Intermittant loss of connectivity

I am using Remote Desktop Client: 6.3.9000

The environment has three virtual servers running in Hyper-V.  One domain controller that is running DHCP, and DNS as well.  One terminal server that users connect to so I assume this is the host/connection broker.  Both of those servers are
2008 R2.  There is also a Server 2012 R2 that is an application server.

The Intermittent loss of connectiovity involves connecting to the terminal server. Both with RDP and through Hyper V manager console.

Can someone help?

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Live and quick migration issue of VM in hyper v cluster

we have 2 VM run on server 2016 . these VM to connect storage to through VSAN  and mount a disk on these VM through VSAN  when we perform quick migration  VM migrate successfully and  SAN disk is visible on VM and we perform live migration
it migrate on that NODE but disk is not visible please help me. we have 2 node hyper v cluster

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C: Parition Full, but it really isn’t

Hello,

We’ve a very stange problem. 
The C: Partition has 49GB Free space left, but we can’t create a folder on it.

Error message:
There is not enough space on Local Disk (C:)
0 bytes needed to perform this operation. Delete or move files so you have enough space.

Local Disk C:
Space Free:49.1 GB
Total size: 199 GB.

We’ve tryed:
Safe mode: Same problem
Sfc /scannow: Windows Resource Protection could not start the repair service
DISM /Online /Cleanup-Image /CheckHealth: ERROR 3. could not create directory.
Shadow Copy is disabled.

Yesterday we’ve restored backup in a new Hyper-V and everything was running fine until this morning, same problem again.

We’re using a Windows server 2016 Host and multiple Windows server 2016 guest. Only 1 is affected with this issue. 

Edit: At recovery mode, we are able to create folders on C: with the command prompt. 

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