Problem vs virtual FC and Network

October 9, 2014, 6:38 am

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We have one hyper-v server that powered off uncorrectly. After that it lost all registry information about Hyper-V Virtual Switch Extension Adapter. And all cmd-lets that work vs VMSwitch return error. I reinstall server on the top of previous installation. That solves the problem vs VM switch. Now we have 2 new problems:

1) when i move servers from rds farm on reinstalled hyper-v server our clients from remote office are disconnecting from farm and can not connect while rds servers are on reinstalled hyper-v. Offices are connected by site-2-site vpn, dns records resolved successefully, hosts are pinged too. When users try to connect they see first credentials request to rds and than second to rd gateway, when they enter their creds they see popup error message "there is some error on remote pc". On the normal situation rd gateway not used.

But local clients works fine vs RDS farm while remote got error.

2) we have some vms vs virtual FC adapters. After reinstalling hyper-v host they lost their livemig ability. What i see - there are new initiators on SAN storage. I register it and make some livemig moves between hyper-v host and register all new initiators, before it i delete all inactive initiators. So what i have - is growing initiators count. There is the table of wwnn's ends and SP's endpoints:

08-B1

08-A1

09-B0

09-B1

09-A1

09-A0

0A-B0

0A-A0

0B-B1

0B-A1

0B-B0

0B-A0

I see that i have an odd connectivity pair for 09 and B0 wwnn's, but if i remove some of them live mig stop working between hosts. For example i remove first of odd pair and vm stop move between hv-01 and hv-02 hosts or if i remove other odd pair vs stop move between hv-02 and hv-03.

What i do wrong?

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Hyper-V Failover Cluster virtual guests suddenly reboots

October 9, 2014, 6:35 am

≫ Next: Enable RDP client on Hyper-V or 2012 Core

≪ Previous: Problem vs virtual FC and Network

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The environment is Server 2012 R2 using dual clusters--a Hyper-V Failover Cluster running guest application virtual machines and a Scale-Out File Server Cluster using Tiered Storage Spaces which are used to supply SMB3 shares for Quorum and CSV. Has anyone had this problem?

Enable RDP client on Hyper-V or 2012 Core

October 8, 2014, 12:09 am

≫ Next: Hyper-v node restarts

≪ Previous: Hyper-V Failover Cluster virtual guests suddenly reboots

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Hello,

Is it possible to enable RDP client (!) on Hyper-V server?

So to be clear, I want to connect FROM Hyper-V TO other machine, and NOT to enable rdp to connect the Hyper-V (that is already done and working).

I know it could sounds pointless, but in some cases I need it.

Best

Hyper-v node restarts

October 9, 2014, 6:45 am

≫ Next: MS licensing in VM environment.

≪ Previous: Enable RDP client on Hyper-V or 2012 Core

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Hello. I've got a two node cluster on windows server 2012 standard. The hardware is Dell VRTX with 2x Power Edge M520. Problem occurs at random on both nodes. In event viewer got those messages:

• Critical 10/7/2014 10:44:24
• Source Kernel-Power
• Event ID: 41
• The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.

 

• Error 10/7/2014 10:44:48 
• Source: BugCheck
• Event ID: 1001
• The computer has rebooted from a bugcheck.  The bugcheck was: 0x00000019 (0x0000000000000020, 0xfffffa80206b1cc0, 0xfffffa80206b1cf0, 0x0000000004030004). A dump was saved in: C:\Windows\MEMORY.DMP. Report Id: 100714-29062-01.

 

Dump analysis:

*******************************************************************************
*                                                                            
*                        Bugcheck Analysis                                   
*                                                                            *******************************************************************************

BAD_POOL_HEADER (19)
The pool is already corrupt at the time of the current request.
This may or may not be due to the caller.
The internal pool links must be walked to figure out a possible cause of
the problem, and then special pool applied to the suspect tags or the driver
verifier to a suspect driver.
Arguments:
Arg1: 0000000000000020, a pool block header size is corrupt.
Arg2: fffffa80206b1cc0, The pool entry we were looking for within the page.
Arg3: fffffa80206b1cf0, The next pool entry.
Arg4: 0000000004030004, (reserved)

Debugging Details:
------------------


BUGCHECK_STR:  0x19_20

POOL_ADDRESS: GetPointerFromAddress: unable to read from fffff802f7b62168
GetUlongFromAddress: unable to read from fffff802f7b621f8
 fffffa80206b1cc0 Nonpaged pool

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  WIN8_DRIVER_FAULT_SERVER

PROCESS_NAME:  System

CURRENT_IRQL:  0

ANALYSIS_VERSION: 6.3.9600.17237 (debuggers(dbg).140716-0327) amd64fre

LAST_CONTROL_TRANSFER:  from fffff802f7a7cba5 to fffff802f7864540

STACK_TEXT:  
fffff880`0af68908 fffff802`f7a7cba5 : 00000000`00000019 00000000`00000020 fffffa80`206b1cc0 fffffa80`206b1cf0 : nt!KeBugCheckEx
fffff880`0af68910 fffff880`0522a2e5 : fffffa80`206b1cd0 00000000`00000002 90339132`0001734d fffffa80`6c704c43 : nt!ExFreePool+0xadb
fffff880`0af689f0 fffff880`05227652 : fffffa80`00000003 fffff880`0af68ab8 2db460d9`0002734d 00000000`00000000 : ClusDisk!ClusDskpScrubPRKeys+0xd5
fffff880`0af68a70 fffff802`f78b2cd7 : fffffa80`3c473560 fffff880`052274c4 fffff880`052274c4 fffffa80`1a108ae0 : ClusDisk!ClusDskReservationWorker+0x18e
fffff880`0af68b10 fffff802`f78a2411 : fffff802`f7a90190 fffffa80`219fbb00 fffff802`f78b2c78 fffff880`06853200 : nt!IopProcessWorkItem+0x5f
fffff880`0af68b80 fffff802`f7837075 : fffffa80`1d5acb00 00000000`00000080 fffff802`f78a22d0 fffffa80`219fbb00 : nt!ExpWorkerThread+0x142
fffff880`0af68c10 fffff802`f78eb3b6 : fffff880`00e5e180 fffffa80`219fbb00 fffff880`00e6a340 fffffa80`18e94400 : nt!PspSystemThreadStartup+0x59
fffff880`0af68c60 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KiStartSystemThread+0x16


STACK_COMMAND:  kb

FOLLOWUP_IP: 
ClusDisk!ClusDskpScrubPRKeys+d5
fffff880`0522a2e5 8bc7            mov     eax,edi

SYMBOL_STACK_INDEX:  2

SYMBOL_NAME:  ClusDisk!ClusDskpScrubPRKeys+d5

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: ClusDisk

IMAGE_NAME:  ClusDisk.sys

DEBUG_FLR_IMAGE_TIMESTAMP:  5258ecbb

IMAGE_VERSION:  6.2.9200.16736

BUCKET_ID_FUNC_OFFSET:  d5

FAILURE_BUCKET_ID:  0x19_20_ClusDisk!ClusDskpScrubPRKeys

BUCKET_ID:  0x19_20_ClusDisk!ClusDskpScrubPRKeys

ANALYSIS_SOURCE:  KM

FAILURE_ID_HASH_STRING:  km:0x19_20_clusdisk!clusdskpscrubprkeys

FAILURE_ID_HASH:  {eb9889fd-94ce-1ea8-80c0-fc6ea4548464}

Followup: MachineOwner
---------

Any idea what it might be, or where to search for more details ?

MS licensing in VM environment.

October 9, 2014, 1:07 am

≫ Next: Guest keeps on consuming all the dynamic memory

≪ Previous: Hyper-v node restarts

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Please assist in the below query….

We would like to know the best approach to buy MS licensing in VM environment.

We have 3 node ESXi Hypervisors backed by VMware vSphere Essential Plus Kit and a storage box. We are planning to run 5 to 10 Windows 2012 server VM instances on this setup. If we buy Windows 2012 DC edition:

1. How will the license key applies for each Windows VM instance..?
2. In the future we will have two VMWare setups to be run on active/active mode (backed by same storage box) and  still are we able to use the Windows 2012 DC license key for the second setup..?
3. If we need to bring up another physical box will the same License key can be apply for the physical box..?

Guest keeps on consuming all the dynamic memory

October 8, 2014, 3:12 pm

≫ Next: virtual machine front end / manager

≪ Previous: MS licensing in VM environment.

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Software:

Host: Windows Server 2012 R2 x64 fully patched

Guest: Windows 8 Update 1 x64 (Fully Patched). 

I've been experience this problem for a few months and really don't know where to go from here. After starting the specific guest that is having the issue it will happen anywhere between 3-7 days. The guest will consume almost all the memory. The only way i can log into the guest is with hyper-v manager. Remote Desktop will hang. Then when i log into the guest i can't bring up task manager or many things.  Every time i have to kill the vm and restart it. Last time i thought to keep process monitor up and running so i could inspect things. Well it happened today again. According the hyper-v manager the guest was consuming almost 24GB of memory:



here is the memory demand:



What's wierd is when i logged into the vm it was showing it only had 4GB of memory with 3.1GB used. There was hardly anything running other than a few services and they weren't using much memory. Quickly process explorer locked up on me. After logging in for say 5-10 minutes this always happens too. After trying to diagnose the for a few minutes it will appear i have rebooted the system because i will get the following:

but i definitly did not reboot. If i come back in 24 hours it will still be at the same spot. Again i have to kill the vm but the same vicious cycle will ensue. I'm at a loss how to diagnose this. I've tried to scour the event viewer but it hasn't helped. Sure i could just turn dynamic memory off or lower the upper threshold of the dynamic memory but i shouldn't have to do that. Thats really just masking the problem. The only default value of dynamic memory i changed was the "Startup Memory". I really don't want to rebuild the vm but what other options do i have here?

virtual machine front end / manager

October 7, 2014, 1:14 pm

≫ Next: Unable to join virtual machines to domain controller

≪ Previous: Guest keeps on consuming all the dynamic memory

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Is there a way to have vm's assigned randomly on user login?  I have a pool of 5 vm's that I would like to offer to my users without assigning specific machines.  I just want the user to connect and get the next one that is available.  Is this easily accomplished?

Thanks

Unable to join virtual machines to domain controller

October 6, 2014, 8:37 am

≫ Next: Hyper-V / Nic Teaming / Best Practices?

≪ Previous: virtual machine front end / manager

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Hello all

I am studying for MCSE 2012 R2 and have decided to move from VMware Esxi 5.5 to Hyper-V in Server 2012R2.

I built the host (Server 2012r2) and so far 3 VMs (all are Server 2012R2 VMs) . I promoted one of the VMs to a Domain controller and things appear to have installed with no issue. This is what I have done so far:

Added Static IP addresses for all VMs

Configured each VM's DNS setting to use the DC 

When I try to join one of the virtual servers to the domain controller this is what I get.

Note: This information is intended for a network administrator.  If you are not your network's administrator, notify the administrator that you received this information, which has been recorded in the file C:\Windows\debug\dcdiag.txt.

The following error occurred when DNS was queried for the service location (SRV) resource record used to locate an Active Directory Domain Controller (AD DC) for domain "wolfpack.local":

The error was: "DNS name does not exist."

(error code 0x0000232B RCODE_NAME_ERROR)

The query was for the SRV record for _ldap._tcp.dc._msdcs.wolfpack.local

Common causes of this error include the following:

- The DNS SRV records required to locate a AD DC for the domain are not registered in DNS. These records are registered with a DNS server automatically when a AD DC is added to a domain. They are updated by the AD DC at set intervals. This computer is configured to use DNS servers with the following IP addresses:

10.0.0.14

- One or more of the following zones do not include delegation to its child zone:

wolfpack.local

local

. (the root zone)

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Phil Balderos

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Hyper-V / Nic Teaming / Best Practices?

October 9, 2014, 10:26 am

≫ Next: administrator permission denied

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Everyone,

We currently have a Dell R710 server with 4 onboard 1gb nic cards.  I want to team these for we will be running virtual servers off this box, and i would like the added benefit of combining these cards bandwidth as well as load balancing / fail-over if a card fails/etc. 

Can someone help me with getting this going?  I am not sure if what i've done falls into best practices, but here's what i've done so far:

1) I gave each network adapter a static IP (no VLANS in our setup)
2) When I installed Hyper-V, I set up a vEthernet External switch on each network interface.  
3) I'm ready to setup a nic Team, but i'm stumped as to how to do this.

When I go to create the Nic Team, it has the following listed:
vEthernet 1, 2, 3 and 4

It does not list my physical ethernet network adapters.

When I try to create a nic team of the 4 vEthernet adapters, it fails with the error "Operation timed out: TeamNic installation did not complete in a timely manner"

Can someone point me in the right direction of getting this going? 

Thank you! 

administrator permission denied

October 9, 2014, 11:02 am

≫ Next: Hyper-v Export

≪ Previous: Hyper-V / Nic Teaming / Best Practices?

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I've got a permission issue on a windows 2003R2 server. I recently added a test user to the local administrator group remotely via computer management. This user was successfully able to RDP and otherwise access this server, I then removed the user. A short while after this point (I can only assume it's related) another user noticed they was unable to access the SQL express database on this machine. 

I tried to RDP to this machine, access was denied. I then connected via computer management to check the local user groups. In the adminstrator group I could see adminstrators. I tried to add the domain admin which I am a member of, access denied.

I can log onto the machine locally but if I try to add any users to the local administrator group again access is denied. I've even tried to add files to the root of the C, D and E drive access denied. However if I try to add a file into a shared folder which has other permissions this works.

I've been able to log onto the SQL database via the sa accounts but not via the windows authentication. Updates can happen to the database aswell.

I'm at a loss of how to enable permission to users to add files to the root, access via RDP and other actions.

Any help is much appreciated. 

Hyper-v Export

October 9, 2014, 11:14 am

≫ Next: Hyper-V AD guest freezing

≪ Previous: administrator permission denied

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Hi All,

I have VM in Hyper-v. I want to export it with ovf format.

(Ie) After i export i should get one .vhd file and .ovf file. How can i do that?

Hyper-V AD guest freezing

August 26, 2014, 9:17 pm

≫ Next: enhanced session mode Hyperv 2012r2

≪ Previous: Hyper-v Export

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Hello all!

I hope someone can help us with our issue.

We are running Windows 2012 Datacenter on a Host. The guest VM is running 2012 as well. Over the past couple weeks we have been having an issue where the guest that is the AD controller just freezes up. Sometimes we are RDP'ed into it and open the start menu to do something and other times no one is logged in but all the folder shares, RDP, etc goes unavailable.

We thought it had to do with the backup system. But the backup isn't running at the time of the freezes. Today we had 2 seperate times that the AD server froze up once in the morning and it affected the other guests so we had to power cycle the host. Then in the afternoon I caught it soon enough to where I could shut the other guests down. When I went to try and shutdown or reset the AD guest it just stated shutting down.. So I ended up having to power cycle the host again.

The event log doesn't show anything in the host or the guest..

We have disabled write caching on the host to hope this will help but we are getting to a loss.

Host system specs are as follows:
Windows 2012 DC
Dual Quad Core Xeon's
72GB Ram
2 x 500GB RAID 1 config through the OS
2 x 4TB RAID 1 config through the OS

We are planning to purchase an iSCSI storage array in the next couple weeks but are afraid it won't fix the issue.. 

Thoughts?

enhanced session mode Hyperv 2012r2

October 4, 2014, 2:46 pm

≫ Next: Hyper-V Lab - SAS Storage

≪ Previous: Hyper-V AD guest freezing

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Hi everyone !

First ... Sorry for my bad English ...

Can someone explain clearly the step to do for allow a usb key insert on my 2012 r2 computer with hyperv be allow to see and use in a vm (2012r2 or windows 8.1) ....

I try to do with the poor docs i can find on Internet but it does'nt work

I don't see any us key on my vm
And the docs i see don't explain the 'how to do"

Thanks !!

Hyper-V Lab - SAS Storage

October 9, 2014, 12:43 pm

≫ Next: Can't Import VM to New Host

≪ Previous: enhanced session mode Hyperv 2012r2

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I have 2 small, standalone Hyper-V labs (two locations) starved for storage, that I'd like to expand.  

I have twelve 1-TB SAS drives that were used for a temporary project, which are now at my disposal.

I'd like to re-use these with my Hyper-V farms.  I was looking at SAS JBOD enclosures, but I want to make sure I understand the requirements for what I want to achieve.

I want this storage compatible with current GEN Hyper-V, and want my VHDs reasonably fast and safe (from drive failures).

Do I need 2 JBOD enclosures for each location, or just one?

Assuming I'm looking at "Provide your Own Drive" solutions, what specifications or features do I need to make sure I'm buying?

Thanks!

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There's no place like 127.0.0.1

Can't Import VM to New Host

October 7, 2014, 3:18 pm

≫ Next: Need to move existing VM to 3 node cluster

≪ Previous: Hyper-V Lab - SAS Storage

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I replaced my Hyper-V host. I've been able to import all by one of my VM's back into the new host. This one in particular I see this in the event viewer when I try to import it. It seems to point to a network issue but all the VM's network were configured the same. As far as the machine goes the only difference is that this is a Linux machine and all the others were windows.

Cannot load a virtual machine configuration: The specified network resource or device is no longer available. (0x80070037). (Virtual machine ID F78ED323-E966-4EAB-B8CC-E7342DDE74CA)

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John Marcum | Microsoft MVP - Enterprise Client Management
My blog: System Center Admin | Twitter:@SCCM_Marcum | Linkedin: John Marcum

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Need to move existing VM to 3 node cluster

October 9, 2014, 4:42 pm

≫ Next: No option to shrink a drive in Hyper-V?

≪ Previous: Can't Import VM to New Host

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Hello all, I thought I already posted this so please forgive any duplicates.  I have a 3 node 2012 R2 DC cluster, and I have another stand alone Hyper-V server that houses a VM that has access to 2 subnets.  The subnets are 192.x and 10.x, and the host is physically connected to both networks, so the VM just has two NICs for each network.  

My question, can I somehow add a virtual switch to my existing cluster and create another network that will allow all of my cluster nodes AND VMs communicate to that VM that I migrate over?  

I do not have any physical connections open on any of the clustered machines.  I wasn't sure if I could just add an internal switch from HV manager, from one of the nodes and just have it show up as a clustered resource... 

Thank you in advance

Steve

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Steve W. MCSA,CCNA,MCP,A+,SEC+,CIW

No option to shrink a drive in Hyper-V?

October 7, 2014, 12:10 pm

≫ Next: SCVMM 2012 SP1 Virtual Switch on Cluster Node Disappears

≪ Previous: Need to move existing VM to 3 node cluster

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I saw a few of the related topics but none really answered my question. Here's the issue: I have a Windows Server 2012 virtual machine Hyper-V with Microsoft Exchange installed on it. Long story short, I made the boot drive way too large, and it won't let me shrink it now.  In fact, I'm not seeing an option to shrink any of my drives in any of my Hyper-V instances - I'm running Hyper-V instances on Windows Server 2012 and 2008R2. 

What prerequisites are necessary before I get an option to shrink?  If it just happens that all my current drives are unshrinkable (need vhdx, can't convert?), what's a good alternate method, short of deploying a brand new server and decommissioning the old one?  Is it possible to copy the contents of vhd/x drive onto a new one and then boot off the that?  Downtime is acceptable for this procedure.

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----------- Ron E Biggs Network Administrator Entertainment Studios

SCVMM 2012 SP1 Virtual Switch on Cluster Node Disappears

August 26, 2014, 7:09 am

≫ Next: Hyper-V Server no longer shows after system crash

≪ Previous: No option to shrink a drive in Hyper-V?

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I have been running into an interesting but an alarming issue with virtual switches. I have recently built a 4 node Server 2012 Hyper-V failover cluster. I have built numerous 2008R2 and 2012 Hyper-V clusters before, so I am pretty familiar with the process. I have rebuilt my VMM due to software problems, and on this new cluster, I have configured the virtual switches with nic teaming on 2 of the virtual switches.

I have 4 clusters being managed by this VMM.. and this newly built cluster keeps losing all of the VMM virtual switch configurations, meaning if I go to properties on the problem host and click on virtual switches, its blank. Refresh host cluster flags all virtual machines in this cluster as "Unsupported Configuration," making the vm unmanageable via VMM. 

Information (26844)
Virtual switch (Virtual Switch Name) is not highly available because the switch is not available in host (One of the Hyper-V Hosts).

Recommended Action

All virtual servers on that host still has connectivity, as all virtual switch configs are normal when looking at it with Hyper-V Manager or Failover Cluster Manager..

The workaround is to evacuate the host using Failover Cluster Manager and reboot the host. Then refresh the host. Then refresh the VM's. I cannot consider this a 'workaround' as I cannot be rebooting my hyper-V hosts every week.. and migrating virtual servers constantly just for this reason. (DPM backups have a FIT with csv's if it tries to backup a vm on a same csv as another vm thats being migrated.)

I have been wrestling with this problem for a few weeks now. The cluster has been slicked and completely rebuilt.. Still same problems. Has ANYONE else out there seen this issue? Does ANYONE out there suggest a way to go about further troubleshooting this issue? 

Hyper-V Server no longer shows after system crash

October 9, 2014, 5:31 pm

≫ Next: MS Virtual Machine Converter - Worked OK but doesn't shutdown source VM, now slow as a dog on "Copy disk(s)" step

≪ Previous: SCVMM 2012 SP1 Virtual Switch on Cluster Node Disappears

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So I currently have a server set up running 2 Hyper-V VM's. One is a Windows DNS server that has been running for about a week, and the other a Ubuntu Server that I created about 2 hours ago and was working on it (after getting the OS and everything set up) until my host server blue screened and restarted. Now the Hyper-V manager only lists the Windows DNS server and not the Ubuntu server, however the Ubuntu server is running (I can ping it and I can SSH into it), but I cannot seem to get Hyper-V manager to recognize it. I've tried deleting the VM GUID from C:\ProgramData\Microsoft\Windows\Hyper-V\Virtual Machines Cache, and there is no data in C:\ProgramData\Microsoft\Windows\Hyper-V\Virtual Machines. I've restarted the Hyper-V management service countless times and have restarted the Host PC a few times with no luck. I am currently running Windows 10 TP (although I don't believe Hyper-V has changed much at this point in W10) Any suggestions? Thanks,  Nolan

MS Virtual Machine Converter - Worked OK but doesn't shutdown source VM, now slow as a dog on "Copy disk(s)" step

October 8, 2014, 1:15 am

≫ Next: Hyper-v 2012R2 Remote Device Manager

≪ Previous: Hyper-V Server no longer shows after system crash

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First issue:

When converting a VM from ESXi to Hyper V using Microsoft Virtual Machine Converter I select the options to shutdown the guest on the ESXi and start it on the Hyper V hosts. When completed the VM is running on both still and never shut down on the ESXi.

Second issue:

The last VM I have been converting is the same size and spec as 3 others which each took approx. 3 hours. They were held up on Convert Disks for the majority of that and completing each other step fine.

Now this one has completed the other steps in the same timeframe, maybe a bit quicker, but now has been stuck on "Copy disk(s) for over 2 hours, still at only 55%. While it's done this, because it didn't shutdown the ESXi guest once converting the disk to local storage,

I have to cancel the process as changes have been made to that guest in this giant no explanation time. So that's now 5 hours conversion time down the toilet.

I have checked everywhere and can find no explanation for the delay in copying. I've checked the network and disk usage on the conversion machine and host and found no issue, I've checked the IOPS on the SAN it's all stored on, looks like it's not even being used. There's no bottleneck so why did 3 servers all the same go fine (literally the same size HD, the same Application on all, the same exact Specs) then the 4th do this shit?