OL6.3 on HyperV

Hello Dear Fellows,
I have IBM x3650 M3 Dual Processor x6 core each, with 32GB RAM and RAID 5 on SAS drives.
Windows 2008 R2 Enterprise HyperV installed on it, virtual machine has been created on it for Oracle Linux 6.3 installation with following VM specifications:
1 single core Virtual Processor
4GB virtual RAM
100GB virtual IDE - fixed size
Legacy Virtual NIC
Linux Integration Services 3.3 installed and all patches applied.
Oracle 11g R2 has been installed on this Oracle Linux 6.3 machine.
Everything is working very fine, but when I try to restore database to it, it takes considerably long time to restore. Oracle Enterprise Manager shows high disk IO.
I suspect it to Hads disk taking time for IO operations.
Kindly advise if I am missing something? I have tried it on multiple machines but response is same.
Same configuration on Vmware is working like a charm.
Please suggest how to fix problem with HyperV.
Thanks,
Athar

You can boot the system into the original RHEL 6 kernel, which might answer if your problem is only with the Oracle UEK kernel or compatibility with the installed Linux Integration Components for Windows. However, if this does not resolve your problem you may have to examine your Hyper-V installation, which is beyond the scope of this forum. If you search the web for "Hyper-V Server 2008 disk performance issues" you will find plenty of related posts and possible solutions. The solution is usually Microsoft Hyper-V related and not Linux specific.

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Error while running script HyperV - Dash Board - VM and Storage Report

Hi Team,
I am getting below error while running HyperV dashoboard monitor & storage report script from Technet script library.
HyperV - Dash Board - VM and Storage Report
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Hi ,
I found that the problem had been solved in the script blog by your self :
http://gallery.technet.microsoft.com/scriptcenter/HyperV-Dash-Board-VM-Disk-299bac7d/view/Discussions#content
Best Regards
Elton Ji
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Windows 7 (Ent) Sp1 on server 2012 R2 HyperV, RFX USB redirection not working

Hello,
I currently have windows server 2012 R2 with HyperV installed. I have built two virtual machines. A windows 8.1 and Windows 7 sp1. Both are enterprise editions
For RemoteFX the hypervisor is using a Zotec GTX 760 GPU. It recognizes it and uses it to apply remoteFX adapter on my Windows 7 Sp1 VM.
As you are aware I do not need to use a GPU to enable RFX on my Windows 8.1 it can do this without the need of a GPU.
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However this issue lies with the Windows 7 SP1 VM. I can connect to it via RDP( Same client) but I cannot redirect any devices to it. I have installed the latest integration services available on the VM. I have ran all updates available.
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Is there a known issue with USB redirection not working on a Windows 7sp1 virtual machine hosted on server 2012 Hypervisor ??
Many Thanks
Brian

Hi,
According to the log above, I found that we run the script on both Server6 and Server7. Errors as below:
Server6: Conversion is not supported in restricted language mode or a Data section.
Server7: Couldn't figure out valid servers from the specified destination scope. Check your parameters and try again.
Since we can only run the RollAlternateserviceAccountPassword.ps1 Script on CAS server, the script not works well if Server6 is MBX server.
For Server7, based on the error message, it seems you still have no right to run the script/cmdlet.
Please add your account to Organization Management Role group(ADUC->domain.com->Microsoft Exchange Security Groups) to test if possible.
By the way, from Technet:
You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "Client Access Security" entry in the Client Access Permissions topic.
Client Access Permissions
http://technet.microsoft.com/en-us/library/dd638131.aspx
Feel free to contact me if there is any problem.
Thanks
Mavis
If you have feedback for TechNet Subscriber Support, contact
[email protected]
Mavis Huang
TechNet Community Support

Win 8.1 running HyperV as VPN server

Hello,
I have a PC running WIN 8.1, I'm running HyperV on it (for win8phone development)
On this PC, I want to set up a VPN server. When I set up incoming connection, it says, that there's no interface for incoming connections. What shall I do so?

Hi,
As Microsoft suggest, you need add two virtual NIC, then attache the NIC to the different vSwitch, one vNIC for the internal another one for the external.
The simlar third party article:
Setup a Windows Server 2012 VPN
http://www.sysads.co.uk/2013/02/setup-windows-server-2012-vpn-part1/2/
Hope this helps.
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Serial Ports using HyperV in Ubuntu guest OS

I need to run a terminal session (term) from within the guest OS, Ubuntu 12.04.3 LTS to a serial port on the Windows 8.1P host. In my case a USB to serial adapter that Windows has mapped to COM5.
I don't really know where to start.  In HyperV, under Settings, I see a Com1 and Com2 under hardware. The two options are None or Named pipe. Not all that clear what to do here.
Presumably this is what will be visible to Ubuntu as /dev/ttyXX   ??
Can anyone point the way to map a serial port into Ubuntu?   Or a suitable workaround?
Thanks.

"How can a VM be so cut off from the hardware like that?"
Well, for the most part, it's been a long time since I have even seen a machine with a serial port on it. It is so uncommon that one generally needs to buy an add-on card or do something like USB to serial. That trend has been going on for a
long time - that's why network based serial devices have tended to the solution for this. This is nothing new. Even Microsoft's Virtual Server, the precursor to Hyper-V (which was released five years ago) did not have access to serial ports.
Since you are asking in the Hyper-V forum, the answer is you can't get to a physical serial port on your host.
.:|:.:|:. tim

Windows Server 2012 HyperV VMs becoming extremely sluggish and slow

I have recently set up a new system for a client consisting of a single Dell T320 server with Xeon E5-2350 2.2GHz 6 core cPU and 32GB of RAM. Windows Server 2012 Standard is installed on the bare metal, and runs only the HyperV role. It is not
joined to any domains.
It hosts two VMs, one a Windows Server 2012 Standard VM containing the RDS related roles acting as remote desktop server, with 10GB RAM allocated and 3 cores. Only 5 people use the terminal server concurrently.
The second VM is a Windows Server 2008 R2 based primary domain controller, with 16GB of RAM allocated and 3 cores. It runs the AD role, as well as Exchange and GFI MailEssentials 2012. Avira is also installed on this VM.
The problem is that the system will function properly for 3-4 days, then suddenly it goes into a state where a multitude of applications would start consuming inordinate amount of CPU time, and become very, very slow. Almost like the hypervisor goes
into a software emulation mode where everything runs like molasses. This affects BOTH VMs equally. For example, Exchange and GFI on the Windows 2008 R2 VM together consume about 25% CPU, most of it is spent in kernel CPU time. At the same
time, in the other Windows Server 2012 VM, svchost, Taskmgr, WMIPrvSE, LogonUI, Explorer, sqlservr, wsmprovhost etc. will all consume a total of about 70% CPU time, this time 99% of this is user time, not kernel time. When one user starts any application,
be that internet explorer, firefox or TaxPrep, the CPU spikes up to 100%.
All while nobody is using the system, the system is idle and no mails are flowing in or out of the system. A reboot of the VMs does not fix anything, even a reboot of the host server does not fix anything. When I yanked out the two power supplies
and performed a hardware diagnostic (which came back 100% OK), it booted up and the slowness was gone for 3 days, until today when it started acting up again like I described above.
One more thing, when the system behaves normally the sunspider javascript benchmark in IE10 takes 316ms to execute (average) on the HyperV host operating system. When the system goes slow like this, I pause the two VMs in HyperV then run sunspider
again, only to be greeted by an average time of 5084ms. So this clearly does not only affect the virtual machines but the host operating system as well. My gut still tells me the hypervisor is getting messed up somehow.
Any ideas? This is a major problem and I have no idea what is causing it.

We have had the EXACT same thing happen with a Dell T320 on two separate servers. The first one was running SQL Server 2008 with nothing else funny going on. It ran fine for a month or so, then it developed this slowness issue. We finally installed SQL on
a loaner box (without Hyper-V) and it worked fine. We brought the T320 back to our shop and tested the hell out of it with Dell's assistance and it was NTF. Took it back onsite and moved an SBS 2011 VM over to it. After a few days, it ground to a halt. CPU
utilization was 100%. I started shedding services, killing Exchange, Sharepoint, etc. Even stripped to the essentials, the CPU was still up in the 60-70% range.
I put a T310 out onsite and downed the guest SBS vm. I copied the HUGE vhd over to the T310 (running Server 2008r2 with the Hyper-V role) and it ran perfectly. CPU at about 2-4%, spiking to 15% occasionally.
We finally concocted a story that the USB controller was bad, so they replaced the motherboard (not the CPUs) and it all seems to be working OK now after we sunk at least 100 man-hours into the problem.
Our second one is a similar setup. T320, Server 2012, Hyper-V role, SBS 2011 Standard and a couple of member servers running basic apps. No one can find any problem and everyone acts like this is something new, although my posting comes one year after Tim's
original posting.
MCP SBSC

Error with dual boot Win 8/OL6 R3

Hello,
I am hoping to discuss this with someone who has experience with this configuration. My goal is to get Oracle Linux dual booting on my windows 8 machine.
I have installed OL but I am having trouble getting it to dual boot win8/OL using the windows boot menu. Whereas windows 8 boots as expected, the Oracle Linux option gives me the error:
"+Windows failed to start. A recent hardware or software change might be the cause...contact you system administrator or computer manufacturer for assistance+
+File:+ \NST\nst_linux.mbr
+Status: 0xc000007b+
+Info: The selected application or operating system couldn't be loaded because a required file is missing or contains errors.+"
Here are some details of the scenario:
- Documentation followed: Red_Hat_Enterprise_Linux-6-Installation_Guide-en-US.pdf
- Hardware: Dell Precision M4700 64 bit UEFI
- OEM installed/Default OS: Windows 8 Pro 64 bit
- Installation source: OracleLinux-R6-U3-Server-x86_64-dvd.iso (written to DVD)
These are the broad steps I followed:
In windows 8
I:
- downloaded the Linux ISO software. The checksum on the download matched
- wrote the ISO to a bootable installation disk
- created a new 344gb partition for Linux using the DOS DISKPART command - partition 7
Linux Install
- I booted using the Linux installation DVD and started the installation
- When Installing Linux partition 7 became a 500mb system partition and partition 8 became the 343 gb Linux partition
- I manually created the boot partition as ext3 (because the pdf I was following said "+If your 64-bit x86 system uses UEFI instead of BIOS, you will need to manually create a /boot partition. This partition must have an ext3 file system. If you choose to partition automatically, your system will not boot.+"
- I installed the boot loader on sda7. I selected “First sector of boot partition - /dev/sda7”. I assume this installs separate GRUB boot loader on the Linux partition (7) – which will then be 'chain loaded' from the windows boot menu. Put another way, it will boot with the windows boot manager, which will give me an option to chain load the Grub boot loader, which will then run Linux...
- I chose the desktop installation
- The installation reported that it completed successfully
I successfully booted back into windows:
- I used easybcd to edit the microsoft bcd and successfully created a boot menu for Oracle Linux. I used the legacy grub because the Linux documentation says "+Note that the version of GRUB in Red Hat Enterprise Linux 6 is an old and stable version now known as "GRUB Legacy" since upstream development moved to GRUB 2.3 Red Hat remains committed to maintaining the version of GRUB that we ship with Red Hat Enterprise Linux 6, just as we do with all packages that we ship.+".
- After installing Linux and updating the BCD, the BCD now looks like this:
Windows Boot Manager
identifier {bootmgr}
path \EFI\Microsoft\Boot\bootmgfw.efi
description Windows Boot Manager
locale en-US
inherit {globalsettings}
integrityservices Enable
default {current}
resumeobject {2b56acdd-8bbe-11e2-9ba6-b8ca3ad88679}
displayorder {current}
{524cc0d3-8bce-11e2-935f-b8ca3ad88679}
toolsdisplayorder {memdiag}
timeout 30
Windows Boot Loader
identifier {current}
device partition=C:
path \Windows\system32\winload.efi
description Windows 8
locale en-US
inherit {bootloadersettings}
recoverysequence {524cc0d1-8bce-11e2-935f-b8ca3ad88679}
integrityservices Enable
recoveryenabled Yes
isolatedcontext Yes
allowedinmemorysettings 0x15000075
osdevice partition=C:
systemroot \Windows
resumeobject {2b56acdd-8bbe-11e2-9ba6-b8ca3ad88679}
nx OptIn
bootmenupolicy Standard
Real-mode Boot Sector
identifier {524cc0d3-8bce-11e2-935f-b8ca3ad88679}
device partition=C:
path \NST\nst_linux.mbr
description OracleLinux
I'm not sure the BCD entry is correct. I assume that this entry should be pointing to the nst_linux.mbr on the Linux boot partition. However I have verified that this file exists in windows 8:
C:\NST\nst_linux.mbr
I haven't been able to exactly confirm how the boot process should work i.e. whether this file should actually be in the Linux boot partition (as opposed to the windows c drive) and whether the BCD should also point to the Linux boot partition when referring to this partition.
As I mentioned above, I now have the windows boot menu with Windows 8 (which boots successfully) and Oracle Linux (which gives me the error see below for complete wording**). Is the Real-mode Boot sector wrong? Should it point to the Linux boot partition? Is it a problem with my UEFI disk? I don't think it should be because this version of Oracle Linux supports UEFI and my hardware is UEFI.
Has anyone carried out a similar win8/OL dual boot?
2001
** Complete wording of the Linux boot option in the windows boot manager:
Windows failed to start. A recent hardware or software change might be the cause. To fix the problem:
1. Insert your Windows installation disk and restart the computer.
2. Choose your language settings, and then click "next".
3. Click "Repair your computer".
If you do not have this disk, contact you system administrator or computer manufacturer for assistance
File: \NST\nst_linux.mbr
Status: 0xc000007b
Info: The selected application or operating system couldn’t be loaded because a required file is missing or contains errors.
Edited by: 2001 on Apr 1, 2013 4:27 PM
Edited by: 2001 on Apr 17, 2013 5:17 PM

Hi,
Here are my responses:
*[asmirnov]* Could you please confirm, I just want to see if I got it right the first time -
*[2001]* I'm happy to share my progress
Q1)
*[asmirnov]* You did create a partition (where you would install Linux) from Win8, correct?
*[2001]* Yes. I used diskmgmt.msc to create a separate partition. I didn't format the partition because the Linux install doesn't want that, it creates and formats the partitions in the unallocated partition
Q2)
*[asmirnov]* You use GRUB (not GRUB2)?
*[2001]* I'm not sure where you were asking about, so I hope my answer here covers all possibilities you may have meant.
I was using the windows 8 boot. I wanted to chain load to the boot loader in the Linux Partition. It is interesting what the Linux install did with my partition, it created 2 partitions in the unformatted partition. 1 was a bootable partition and the other was the Linux partition. The details were:
2 sda’s (a boot / ext4 and a VolGroup (vg_linuxlocalhost)/ physical volume (LVM) ). In the VolGroup it created 3 lv’s, lv_root, lv_home and lv_swap. I understand that this is all normal.
I followed the documentation note which said "To configure the Red Hat Enterprise Linux boot loader to chain load from a different boot loader, you must specify the boot drive manually. If you chose any of the automatic partitioning options, you must now select the Review and modify partitioning layout option before you click Next or you cannot specify the correct boot drive"
So there was also the note in the documentation that said "Note that the version of GRUB in Red Hat Enterprise Linux 6 is an old and stable version now known as "GRUB Legacy" since upstream development moved to GRUB 2.3 Red Hat remains committed to maintaining the version of GRUB that we ship with Red Hat Enterprise Linux 6, just as we do with all packages that we ship." I didn't install any bootloaders manually (either the windows 8 OOTB default that came with my machine or the Linux one), I just took the defaults. I'm wasn't sure how to access the Linux partitions once it is installed, so I can't confirm it was the legacy GRUB in the Linux boot partition, but I believe this note is saying that it OL6 does use the legacy grub. I believe GRUB Legacy is version .97.
Q3)
*[asmirnov]* Which version of Linux exactly did you use, was that Oracle Linux or you used one from RedHat directly? What is the kernal version?
*[2001]* I used "OracleLinux-R6-U3-Server-x86_64-dvd.iso.sha1sum" from the mirror site http://mirror.aarnet.edu.au/pub/oraclelinux/OL6/U3/x86_64/. According to the release notes at: https://oss.oracle.com/ol6/docs/RELEASE-NOTES-U3-en.html the kernel is
- Unbreakable Enterprise Kernel Release 2 [kernel-uek-2.6.39-200.24.1.el6uek]. Installed and booted by default
- Red Hat compatible Kernel [kernel-2.6.32-279.el6]. Installed by default
Note: By default, both the Unbreakable Enterprise Kernel and the Red Hat Compatible Kernel for the specific architecture (i386 or x86_64) are installed, and the system boots the Unbreakable Enterprise Kernel by default. If needed, /etc/grub.conf and /etc/sysconfig/kernel can be modified to make the system boot with the Red Hat Compatible Kernel by default.
Regarding your follow-up point that "Microsoft blocks 3rd party chainloaders from the BCD menu for UEFI machines. We are researching workarounds, none have presented themselves as of yet.", I'm not sure it actually blocks it, but it certainly isn't a straight forward process.
I have actually abandoned my attempt to get the dual boot working. It is a real shame because I wanted to do it for my own satisfaction.
I am now using Oracle Virtual Box as suggested by others, include Dude earlier in this thread. This has given me confidence that I was doing all the right things because the install worked first time without any problems. The virtualization is much simpler and I have had no problems so far.
Fusion
As for your point about the fusion middleware and OL5. I am looking at Oracle SOA with is part of the Fusion brand. I think that the latest SOA components will work on OL6 - but I have yet to try it. Following the certification matrix can be a little difficult. So as I indicated above, my current thoughts are to use the Oracle Virtual Box with Linux r6 u3 and to install the SOA components on that when I get chance. The alternative is using the pre-built virtual machine it has Linux and SOA (it might cover your stack too, or there may be another one that suits you better on the site) http://www.oracle.com/technetwork/middleware/soasuite/learnmore/vmsoa-172279.html. Note that this is still on OL5.
I hope this helps.

Unable to delete the files from CSV volumes on HyperV Cluster

Hello There,
I have a HyperV failover cluster with CSV Volumes recently i moved some of the VMs to another cluster.
VMs are moved but i still have the VM files on the CSV volumes which are occupying the disk space i tried to delete the VHD files / VM folders which are moved but it doesn't delete the files, please suggest.
This file when i browse it from a server and delete the file it disappears but when i revisit the folder i find the files still on the disk, i did try to delete the files directly
from the server through command line as it is running server core.
Regards,
Maqsood
Maqsood Mohammed Senior Systems Engineer MCITP-Enterprise Admin & ITILv3 Foundation Certified

HyperV is good about not allowing you to delete files while they are still in use. You can try to reboot host, make sure all parts if your VM moved to the new location. If that VHD is associated with a VM on any host you will not be able to delete
it. Delete the VM's that may have links to it. Not knowing you configuration could it be a parent disk? Be carful because if you can't delete it it's likely in use, I've see VHD merge after you delete a VM too preventing you from deleting the files.
You may just want to wait a day or so and see if it free's up. If it is doing a merge reboot will pause and restart it so you won't be able to remove until the merge is done, once you delete a VM and a merge starts there is no way to tell if it's merging,
watch the size and timestamp of the VHD is it changing if it is something is using it.

Saved state is not backuped in HyperV backup for Win2012R2

I am trying to backup Win2012 R2 VM on my Win2012 R2 hyperv host using VSS.
Before starting backup my vm is in Saved status.
But after backup I cant find saved state file *vsv and *bin file in the backup so I am loosing whatever contains I have in saved state.
Its working fine on Win2008. Is there any change in VSS/Saved state behavior in Win2012R2?
hypervbackup is the utility I used to run backup.
Thanks In advance. Please let me know if more details are required.

Hi Sir,
According to your description , one thing came into my mind .
In 2008/R2 , to backup VM online the hyper-v vss writer must be registered , if not , the VM will run into saved state untill accomplishing the backup .
http://blogs.technet.com/b/askcore/archive/2008/08/20/how-to-enable-windows-server-backup-support-for-the-hyper-v-vss-writer.aspx
If you are in that case ( hyper-v VSS writer was not registered in 2008/R2 ) , actually the backup will perform a file based backup , it will keep the VSV file there .
If you do same backup in 2012 R2 (select VM's folder then backup) , the VSV file should be backed up .
In 2012/R2 you do not to manually register vss writer , you just need to select VM and backup .
Best Regards,
Elton Ji
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected] .

What is the latest kernel version for OL6

Hi,
After a yum update, this is what I got:
2.6.32-300.39.1.el6uek.x86_64
I am using a SSD and it seems (based on en.wikipedia.org/wiki/TRIM) that
support for ATA TRIM was added in 2.6.33.
My question is what is the latest kernel version for OL6?
Thanks,
Zhe

alwu wrote:
My question is what is the latest kernel version for OL6?2.6.39-300.17.2 (which is actually 3.0.17 under the hood) is available in the ol6_x86_64_UEK_latest channel. You will need to modify your ULN channel subscription or which channels are enabled from public-yum.oracle.com to install this kernel.
Edited by: Avi Miller on Dec 6, 2012 10:41 AM

Prblem with iSCSI on Win Server 2012R2 with HyperV role

Hi all,
I have some problems with iSCSI on Win server. The problem is the following.
When I restart server it cannot find the path with VMs configuration and VMs can't start. After few minutes all problems are gone and HyperV can find everything but I must start VMs manually.
The server is DELL R710 with Broadcom NICs. I tried to configure LAN interfaces for iSCSI in two ways. First - from OS and second - from Broadcom BACS with disabled NDIS/Ethernet and enabled iSCSI. The results are the same.
I have two more servers connected to the storage in the same way and everything is fine there.
Events are following:
1. Source MSiSCSI. ID 108
Status 0x00001069 determining that device interface \\?\{8e7bd593-6e6c-4c52-86a6-77175494dd8e}#MsVhdHba#1&3030e83&0&01#{2accfe60-c130-11d2-b082-00a0c91efb8b} does not support iSCSI WMI interfaces. If this device is not an iSCSI HBA then this error
can be ignored.
2. Source bxois. ID 1
Initiator failed to connect to the target. Target IP address and TCP Port number are given in dump data.
3. Source MSiSCSI. ID 113
iSCSI discovery via SendTargets failed with error code 0xefff0003 to target portal *10.10.45.36 0003260 B06BDRV\L4SC&PCI_163914E4&SUBSYS_02351028&REV_20\5&2457021e&0&30050200_0 10.10.45.37.
4. Source Hyper-V-Config. ID 4096
The Virtual Machines configuration 72D1CB1A-A7E3-425A-A709-DA9F6BF0E1A9 at 'I:\VM\exch01-t' is no longer accessible: The system cannot find the path specified. (0x80070003).
5. Source SMagent. ID 1
Message from SM agent service: SMagent: The SMagent service attempted to start but terminated. Possible causes include: [1] The access virtual disk is disabled in NVSRAM. [2] No RAID controller modules with compatible firmware were found. [3] The default
logical unit number (LUN) assigned to the access virtual disk (typically 7 or 31) is not in the range supported by the host or is already in use by the host for another device. See your storage management documentation for more details.
The Host Context Agent did NOT start because 0 RAID controller modules were found.


Hi Sergey,
>>When I restart server it cannot find the path with VMs configuration and VMs can't start. After few minutes all problems are gone and HyperV can find everything but I must start VMs manually.
As a workaround you can set the "startup delay" for VMs .
>>Initiator failed to connect to the target. Target IP address and TCP Port number are given in dump data.
The possible cause may be the network stack is not fully prepared when the initiator was trying to connect to persistent targets. The initiator will try to connect. When the network stack is fully prepared, the connection should be successfully established.
If you receive this error when the iSCSI target device that is listed on the
Favorite Targets tab no longer exists, you can resolve this issue by removing the iSCSI target device from the list of favorite targets.
If you receive this error, and you cannot access an iSCSI target device that is still configured on the network, make sure that the client computer has network connectivity to the iSCSI target. Additionally, make sure that name resolution is working correctly.
If you have successfully connected to your iSCSI target device despite this error, it indicates that the connectivity issue was temporary. Therefore, you can safely ignore this Error event.
https://support.microsoft.com/kb/976072?wa=wsignin1.0
Best Regards
Elton JI
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Stress test on an HyperV server.

I have just installed my 1st HyperV server and it seems a bit sluggish.
Does Microsoft have a program to stress test the system(CPU, memory, NIC, Harddrive) and provide a report...?
Thanks,
Tom...
Tom Karpowski...

"Copying a file" now requires context.
The management OS? Within a VM? To a VM from the Management OS?
Where are the VMs stored? Where was the file stored?
There is a large amount of context that is required to respond to your statement.
Could the addition of Hyper-V impact the time it takes to copy a file? Possibly. But this is a huge; 'it depends' type of answer.
Can you stress your server? Yes. Can you compare these results against servers without Hyper-V installed? No, not really. Everything is now different.
Brian Ehlert
http://ITProctology.blogspot.com
Learn. Apply. Repeat.
Disclaimer: Attempting change is of your own free will.

Restore Domain Controller Server with Snapshot in HyperV

Dear Team,
I
have a Domain Controller (Windows Server 2008R2) hosted in my HyperV, and Accidentally
its got corrupted and i have a snapshot backup which took 20 days back. when i restore that snapshot, i am unable to establish communication with al other computers those were already added to the domain.
We will highly appreciate if you could let us know how we can resume our AD Server’s communication with
other servers.

ALSO SEE
https://jorgequestforknowledge.wordpress.com/2006/03/08/backup-and-restore-of-active-directory-2/
Cheers,
Jorge de Almeida Pinto
Principal Consultant | MVP Directory Services | IAM Technologies
COMMUNITY...:
DISCLAIMER: This post is provided "AS IS" with no warranties of any kind, either expressed or implied, and confers no rights! Always evaluate/test yourself before using/implementing this!

HyperV 2012 R2 Failover cluster, HV problem, all VMs restart

Hello, I have 2 node Failover cluster with two nodes, Hyperv 2012, multipath SAS storage MSA2000. But hardware problem with one node (node2). It shutdown unexpectly. When It hapens NODE1 restar all VMs it is normal? It was configured by cluster validation
tool. There is no witness. I don't clearly understand what happens if one node crash. KR.

As Eric has said it will start the VM's in a crash consistent state on the non crashed host.
But from your example I take your seeing your guests on the non crashed host restart. If this is the case I would say yes! I have seen this happen before. It can happen if your not using quorum because only one node has a vote. I would recommend you create
a witness, on your MSA 2000 carve out 1 GB and do a disk witness. Or if you have a server not in the VM cluster you could do a file share witness, file share is my preferred. Once you have a witness in play you will see all of your hosts having a vote. Look
in the cluster manager at the nodes section. You should see a vote column. Currently it will say 1/0, once the witness is created it will show 1/1.

0x8345000E in HyperV 2008 R2 Datacenter

Hi,
We have three HyperV 2008 R2 datacenter server and they are in Cluster. recently some VM instants are going down frequently with I/O device error. These server is pinging but not accessible either remote or direct connect. I am getting
I/O offline device error when i logged the server directly. Kindly find the error as below and let me know the resolution for the same.
Error :-
'BLR-WIN-DEMO' failure in machine remoting system. Error: '%%2202337294' (0x8345000E). (Virtual machine ID FFA51950-4765-4FE7-ABF6-E4845F7C79CE)
blr-Mobi-gim-qa00.altimetrik.com' was reset because an unrecoverable error occurred on a virtual processor that caused a triple fault. If the problem persists, contact Product Support. (Virtual machine ID 0F74C679-37C7-4ADC-850F-5B3BAA0139C1)
blr-Mobi-M-Wiki-app.altimetrik.com': The Data Exchange integration service is either not enabled, not running or not initialized. (Virtual machine ID 9DC2611B-A4D7-41F5-901D-9930DAE3BCF9)

Hi Sir,
>>blr-Mobi-M-Wiki-app.altimetrik.com': The Data Exchange integration service is either not enabled, not running or not initialized. (Virtual machine ID 9DC2611B-A4D7-41F5-901D-9930DAE3BCF9)
According to the errror , please check if the integration services were installed on these VMs .
What is the OS of problematic VMs ?
>>I am getting I/O offline device error when i logged the server directly
If the VM is using pass-through disk , please try to unplug the pass-through disk and give it a normal vhd file for test .
Any further information please feel free to let us know.
Best Regards,
Elton Ji
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OL6.3 on HyperV

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