HYPER-V 2012 R2 - EVA 4400 - Guest Centos 7 Virtual Fibre Channel

Dear colleagues,
We can't connect EVA4400 LUN's to virtual Guest Machine Centos 7 through virtual Fibre Channel. On the same configuration Guest Machine with Windows 2012 R2 works normally.
[root@lstst log]# lsmod | grep hv_
hv_utils               18357 0
hv_netvsc              31253 0
hv_storvsc             21881 2
hv_vmbus              183547 6 hyperv_keyboard,hv_netvsc,hid_hyperv,hv_utils,hyperv_fb,hv_storvsc
[root@lstst log]# lsscsi -ll
[2:0:0:0]    disk    Msft     Virtual Disk     1.0   /dev/sda
state=running queue_depth=200 scsi_level=5 type=0 device_blocked=0 timeout=180
iocounterbits=32 iodone_cnt=0x1405 ioerr_cnt=0x0 iorequest_cnt=0x1405
queue_type=simple
[3:0:0:0]    disk                                    /dev/sdb
state=running queue_depth=200 scsi_level=0 type=0 device_blocked=0 timeout=180
iocounterbits=32 iodone_cnt=0x2a ioerr_cnt=0x0 iorequest_cnt=0x2a
queue_type=simple
[3:0:0:1]    disk                                    /dev/sdc
state=running queue_depth=200 scsi_level=0 type=0 device_blocked=0 timeout=180
iocounterbits=32 iodone_cnt=0x29 ioerr_cnt=0x0 iorequest_cnt=0x29
queue_type=simple
[4:0:0:0]    disk                                    /dev/sdd
state=running queue_depth=200 scsi_level=0 type=0 device_blocked=0 timeout=180
iocounterbits=32 iodone_cnt=0x28 ioerr_cnt=0x0 iorequest_cnt=0x28
queue_type=simple
[4:0:0:1]    disk                                    /dev/sde
state=running queue_depth=200 scsi_level=0 type=0 device_blocked=0 timeout=180
iocounterbits=32 iodone_cnt=0x28 ioerr_cnt=0x0 iorequest_cnt=0x28
queue_type=simple
[root@lstst log]# cat /proc/scsi/scsi
Attached devices:
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: Msft     Model: Virtual Disk     Rev: 1.0
Type:   Direct-Access                    ANSI SCSI revision: 04
Host: scsi3 Channel: 00 Id: 00 Lun: 00
Vendor:          Model:                  Rev:
Type:   Direct-Access                    ANSI SCSI revision: 00
Host: scsi3 Channel: 00 Id: 00 Lun: 01
Vendor:          Model:                  Rev:
Type:   Direct-Access                    ANSI SCSI revision: 00
Host: scsi4 Channel: 00 Id: 00 Lun: 00
Vendor:          Model:                  Rev:
Type:   Direct-Access                    ANSI SCSI revision: 00
Host: scsi4 Channel: 00 Id: 00 Lun: 01
Vendor:          Model:                  Rev:
Type:   Direct-Access                    ANSI SCSI revision: 00
dmesg
[ 205.580687] hv_storvsc vmbus_0_6: cmd 0x28 scsi status 0x0 srb status 0x22
[ 205.585931] hv_storvsc vmbus_0_6: cmd 0x28 scsi status 0x0 srb status 0x22
[ 205.591237] hv_storvsc vmbus_0_5: cmd 0x28 scsi status 0x0 srb status 0x22
[ 205.591733] hv_storvsc vmbus_0_5: cmd 0x28 scsi status 0x0 srb status 0x22

[root@lstst ~]# fdisk -l
Disk /dev/sda: 42.9 GB, 42949672960 bytes, 83886080 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0000e8e7
   Device Boot      Start         End      Blocks   Id System
/dev/sda1   *        2048     1026047      512000   83 Linux
/dev/sda2         1026048    83886079    41430016   8e Linux LVM
Disk /dev/sdb: 0 MB, 512 bytes, 1 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/sdc: 0 MB, 512 bytes, 1 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/sde: 0 MB, 512 bytes, 1 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/sdd: 0 MB, 512 bytes, 1 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-swap: 4177 MB, 4177526784 bytes, 8159232 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-root: 38.2 GB, 38243663872 bytes, 74694656 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

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I am trying to find out what the current best practice is for Time service settings in a Hyper-V 2012 environment. I find conflicting information. Can anyone point me in the right direction. I have found some different sources (links below) but again the
are not consistent. Thanks
http://blogs.msdn.com/b/virtual_pc_guy/archive/2010/11/19/time-synchronization-in-hyper-v.aspx
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I think I know the answer to this question, but one someone to tell me for sure....
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Hi jesmitch,
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plaese refer to following preparation :
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Best Regards
Elton Ji
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Hyper-V 3 (2012) Virtual Fibre

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Hi Robert,
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2 Chassis 5108.
4 FEX 2208.
16 Servers B200M3.
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SUSE11 SP3 virtual SAN configuration with hyper-V 2012 X64 not working.

Below is the hyper-v server details.
HyperV server : windows 2012R2 X64 datacenter.
Steps performed for SUSE11 SP3 host.
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Hi Sir,
>>I got to know from microsoft tech note that linux IC comes by default with SUSE and no need to install separately.
Yes, you are right .
I have also checked "virtual fibre channel" is supported in SUSE11 SP3 :
https://technet.microsoft.com/en-us/library/dn531027.aspx
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http://blogs.technet.com/b/privatecloud/archive/2013/07/23/hyper-v-virtual-fibre-channel-design-guide.aspx
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https://social.technet.microsoft.com/Forums/systemcenter/en-US/home?forum=linuxintegrationservices&filter=alltypes&sort=lastpostdesc
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] .

Hyper-v 2012 Backup Essentials on Centos 6.5

I am running Centos 6.5 (new install).
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https://github.com/LIS/backupessentials

I tried to install the Hyper-V backup essentials on a Linux CentOS 6.5 virtual machine and it says that conflicts with the 6.3 Version of the Hyper-V module, how can i -force the installation to overwrite the file? bellow the error:
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Installing Hyper-v Backup Essentials
Preparing... ########################################### [100%]
file /usr/sbin/hv_vss_daemon from install of microsoft-hyper-v-vss-rhel65.1.0-20140121.x86_64 conflicts with file from package microsoft-hyper-v-rhel63.3.5-20131212.x86_64
Installing Hyper-V Backup Essentials failed, Exiting.
Regards,
Anastasis

Online Backup of supported Linux VM on Hyper-V 2012 R2 / SC DPM 2012 R2

Hi,
I'm trying to set up a lab environment:
Win 2012 R2 with Hyper-V
running 2 Linux Machines:
Linux2 - CentOS 6.4 with manually installed Linux Integration services 3.4
Linux3 - CentOS 6.4 without LIS (should be already included in CentOS)
Another machine running Win 2012 R2 Server with SC DPM 2012 R2
but both VMs show as "Offline" when trying to back them up via DPM. Tried local Windows Server Backup with the same result.
I am able to backup the VMs "offline" (pausing the VM, taking snapshot, resume VM) but according to MS, SC DPM 2012 R2 should be able to do Online backups for supported Linux VMs (http://blogs.technet.com/b/virtualization/archive/2013/07/24/enabling-linux-support-on-windows-server-2012-r2-hyper-v.aspx)
The only things in the EventLog are these:
A storage device in 'Linux3' loaded but has a different version from the server. Server version 6.0 Client version 4.2 (Virtual machine ID 4F5CDDD8-B855-41CF-83B2-772C1B99090D). The device will work, but this is an unsupported configuration.
This means that technical support will not be provided until this problem is resolved. To fix this problem, upgrade the integration services. To upgrade, connect to the virtual machine and select Insert Integration Services Setup Disk from the Action menu.
Any Ideas ?
Thanks

Hi,
That list would need to come from the Windows hyper-v group, they are responsible with adding the feature to the integration components for various Linux OSes. DPM just backs up whatever the hyper-V writer presents to us, if the guest supports
online, we back it up online, if not hyper-V saves the guest before the VSS snapshot is taken and DPM takes the backup from the saved state.
NEW NOTE ADDED 1-29-14: Windows group just released “Linux Integration Services Version 3.5 for Hyper-V”. The
document mentions that some versions of Red Hat and CentOS are now
supported to do online backup.
Live virtual machine backup support
======================
RHEL/CentOS 6.0-6.3
RHEL/CentOS 5.7-5.8
RHEL/CentOS 5.5-5.6
ADDTL NOTES: If there are open file handles during a live virtual machine backup operation, the backed-up virtual hard disks (VHDs) might have to undergo a file system consistency check (fsck) when restored.
Live backup operations can fail silently if the virtual machine has an attached iSCSI device or a physical disk that is directly attached to a virtual machine (“pass-through disk”).
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT] This
posting is provided "AS IS" with no warranties, and confers no rights.

EVA 4400 disk performance

Hi
We're running HP blade system on Hyper-V 2008 R2 cluster with EVA 4400 storage.
EVA has two disk groups
- diskgroup 0 (enclosuer 0) with 10 FC disks 400GB 10k
- diskgroup 1 (enclosure 1) with 8 FC disks 300GB 15k
We're dealing with a high impact on disk I/O performance on SQL servers running on Hyper-V hosts on VM (Win2008 + SQL 2008).
R/W performance is between 20-30MB/s, but only on servers running SQL. On all other VM servers without SQL performance is between 50-60MB/s.
We have already consulted with Microsoft support, they didn't find any issues with cluster or VM, also there is no other HW impact on performance.
The only conclusion by our appinion is that SQL servers are generating so many I/O requests, that EVA or HBA on hosts can't handle that.
Is this true, or how can we check that ? SQL profiler show normal activity, also there is no other issues with operating sistem, so we're certain that there must be some kidn of connection between VM - HOST - EVA.
Also running RW test directly on a host connected to EVA, Read results are between 200-300MB/s, but Write is between 60-100MB/s.
Any additional points how to proceed next are welcome.
Regards,
Miha

I think it might be beneficial to take a look at the array performance statistics. The evaperf can be found at c:\Program Files\Hewlett-Packard\EVA Performance Monitor if it is selected during CommandView installation. Some useful stats to collect are:
evaperf cs –cont 60 -dur 3600 -csv -ts2 -sz xxxx-xxxx-xxxx-xxxx > controller.csv
evaperf hps –cont 60 -dur 3600 -csv -ts2 -sz xxxx-xxxx-xxxx-xxxx > hostport.csv
evaperf vd –cont 60 -dur 3600 -csv -ts2 -sz xxxx-xxxx-xxxx-xxxx > vdisk.csv
evaperf pdg –cont 60 -dur 3600 -csv -ts2 -sz xxxx-xxxx-xxxx-xxxx > diskgroup.csv
evaperf pda –cont 60 -dur 3600 -csv -ts2 -sz xxxx-xxxx-xxxx-xxxx > disk.csv
evaperf vdg –cont 60 -dur 3600 -csv -ts2 -sz xxxx-xxxx-xxxx-xxxx > vdiskgroup.csv
where xxxx-xxxx-xxxx-xxxx is the world wide name of the array e.g. 5000–1FE1–5000–A9F0. You can probably find it on the controller LCD or some serial number label sticker at the back.
Because window server command prompt does not support running command at the background (at least I do not know how) unlike hp-ux server, you will have to open several command prompt window and run these command at the same time. Then probably zip and posted it somewhere so that we can all take a look.
the 60 here means we make one collection every 60 seconds, and -dur 3600 means for a duration of 3600 seconds which is one hour. For a start, we do not want to collect huge amount of data. We probably want to collect one set when array has no problem, and one set when array has problem, then make a comparison

SLES 10 (SP3) on Hyper-V 2012 R2

I do realize that is unsupported (only SP4 supposedly is)
But I have SLES 10 (SP3) image that got converted from vSphere
Once I can boot the IDE disk (by editing menu.lst to /hda1 & uninstall Vmware Tools, I would need to get network connectivity, so logical step would be to use Intergration Services 2.1 (one that supports SLES 10 SP3)
But it is a no go. On make install during load of vmbus the whole VM just hangs & dies
http://imageshack.com/a/img545/7339/16u1.jpg
The initrd never even gets created as it dies & reset is the only option
If I rem-out vmbus start in Makefile then I can get new kernel installed, but restulting kernel will panic on VM boot
Anybody has any clever idea how to get it working (if at all possible)
Seb

Getting this to work is going to be difficult. The older LIS 2.1 does not work with Hyper-V 2012 and 2012 R2 due to changes in Hyper-V itself. But you could probably get SLES 10 SP3 with LIS 2.1 working if you went back to the older Hyper-V
2008 R2.
You are correct that the LIS 3.4 package is created only for the Red Hat (and CentOS) distros. It will not work with SLES releases.
We've gotten occasional requests to get SLES 10 working on Hyper-V 2012 and 2012 R2, and we're in conversations with SUSE about creating a combination that works. But we don't have anything to announce about a timeline. When/if we get something
working, it will most likely be SLES 10 SP4, since that's the most up-to-date version from the SLES 10 series.
Michael Kelley, Lead Program Manager, Open Source Technology Center

Hyper-V 2012 R2, integration services issue on multiple VMs

Hello,
I came to you because we encounter a technical issue on one of our Hyper-V (2012 R2).
Our backup (Veeam backup in last version) are still failing with error :
Guest processing skipped (check guest OS VSS state and integration components version)
After checking integration service states of those VMs on the Hyper-V, we get this result :
Get-VM | ft Name, IntegrationServicesVersion
Name
IntegrationServicesVersion
xxx-3REP-01
6.3.9600.16384
xxx-ADMIN02
xxx-BAK02
6.3.9600.16384
xxx-MAIL-01
xxx-SCOM-01-1
6.3.9600.16384
xxx-SQL02
6.3.9600.16384
xxx-VC-01
6.3.9600.16384
xxx-VD01
xxx-VMM02
xxx-VMM03
xxx-WEB01
Get-VMIntegrationService xxx-vmm02 | Select Name,OperationalStatus
Name
OperationalStatus
Time Synchronization
{Ok}
Heartbeat
{Ok, Ok}
Key-Value Pair Exchange                                  {LostCommunication}
Shutdown
{LostCommunication}
VSS
{LostCommunication}
Guest Service Interface                                     {LostCommunication}
I already try to disable, then enable the operationalStatus :
Disable-VMIntegrationService -VMName MyVM -Name VSS,Shutdown,"Key-Value Pair Exchange"
Enable-VMIntegrationService -VMName MyVM -Name VSS,Shutdown,"Key-Value Pair Exchange"
The status is OK, but If I retry my backup I have the same error.
So, is there a way to reinstall integration service component without rebooting ?
Many thanks for your help.

On the Windows VMs that are not 2012 R2, insert the Integration media ISO, install it, and reboot.
When all is done, run this:
# Input:
$HVHost = "YourHostHere"
# Processing:
$VMInfo = @()
Get-VM -ComputerName $HVHost | where { $_.State -eq "Running" } | % {
$Info = New-Object -TypeName psobject
$Info | Add-Member "VMName" $_.Name
$Info | Add-Member "IntegrationServicesVersion" $_.IntegrationServicesVersion
$OS = Invoke-Command -ComputerName $_.Name { (Get-CimInstance Win32_OperatingSystem).version } -ErrorAction SilentlyContinue
$Info | Add-Member "OSVersion" $OS
$VMInfo += $Info
# Output:
$VMInfo | Out-GridView
$VMInfo | FT -AutoSize
$VMInfo | Export-Csv .\VMInfo.csv -NoTypeInformation
Sam Boutros, Senior Consultant, Software Logic, KOP, PA http://superwidgets.wordpress.com (Please take a moment to Vote as Helpful and/or Mark as Answer, where applicable) _________________________________________________________________________________
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Whether Hyper-V 2012 will support Thin provisioning ?

Hi All,
I am installing windows server 2012 in Hyper V as a VM using iso images.... While creating new virtual machine in Hyper-V I am not able to see any options like "Thin Provisioning"... In Hyper V how thin provisioning will
work and how to enable it?
I install one Server 2012 in Hyper V--> It display harddisk type as "xxxx.vhdx"
Note:In Vmware the thin provisioning option is available while creating virtual machines.
Thanks,
Rajarajan.D

Hello,
I hope you have a great day.
Creating the VHDX file as dynamically expanding, is the VMware equivalent to thin provisioning.
Example: Create dynamically vhdx with size of 100 GB and install Server 2012 OS. The Guest OS will see drive capacity as 100GB however the actual vhdx file would only consume about 15 - 30GB physical hard disk space depending on the features/roles you
install in the OS.
Creating a 100GB Fixed VHDX would consume 100GB of physical hard disk space.

VM Protection running on Hyper-V 2012 R2 with DPM 2010

Hi everyone,
We recently setup a new Hyper-V 2012 R2 server hosting virtual machine running with a Win2012 R2 server OS and 2008R2 standard Edition
Our backup solution is still running DPM 2010.
As I understand from the DPM Protection Support Matrix, You can only protect virtual machine running on a hyper-v server under Windows 2012 R2 OS with DPM 2012 R2. Isn't there possible any walkaround to have the vm protection working on dpm2010?
Otherwise, if we choose to protect the VM at guest level instead of host-level, is DPM able to perform the recovery point?
For instance, we've got a VM running a SQL database. We would like specifically to back up that SQL database running on that virtual machine.Is DPM able to perfom that job?
Regards,
Evan

Hi,
To remain in a supported configuration you need to a DPM 2012 R2 server to protect the Windows 2012 R2 hyper-v server. Unfortunately, the path to get there from DPM 2012 is not an easy one.
Upgrade steps.
Note: the Operating system and SQL requirements for DPM 2012
System Requirements for DPM in System Center 2012
http://technet.microsoft.com/en-us/library/hh757757.aspx
1) On DPM 2010 install the latest update: KB2751231 Description of hotfix rollup package 7 for System Center Data Protection Manager 2010
2) Update the Agents to 3.0.8195.0
3) Backup the DPM 2010 database.
4) Upgrade to DPM 2012 and update agents.
5) Install the latest DPM 2012 update and Update agents.
6) Backup the DPM 2012 database.
7) Upgrade to DPM 2012 Sp1 and update agents.
Note: The Operating system and SQL requirements for DPM 2012 Sp1
System Requirements for DPM in System Center 2012 Sp1
http://technet.microsoft.com/en-us/library/jj651645.aspx
8) Install the latest DPM 2012 Sp1 update and update agents.
KB2904723-Issues that are fixed in System Center 2012 Data Protection Manager SP1 Update Rollup 5
http://support.microsoft.com/kb/2904723
KB2904730-Description of System Center 2012 Service Pack 1 Update Rollup 5
http://support.microsoft.com/kb/2904730
9) Continue to DPM 2012 R2..
Note: the Operating system and SQL requirements for DPM 2012 R2.
System Requirements for DPM in System Center 2012 R2
http://technet.microsoft.com/en-us/library/hh758176.aspx
10) Backup the DPM 2012 Sp1 database.
11) Upgrade to DPM 2012 R2 and update agents
12) Install latest DPM 2012 R2 update and update agents.
Else, you could stand up a new dedicated DPM 2012 R2 server from scratch to protect that new server and leave the DPM 2010 as is for current protection.
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT]
This posting is provided "AS IS" with no warranties, and confers no rights.

Hyper-V 2012 Breaks Ubuntu 10 and 11

Hi All,
With Hyper-V 2008 R2 installing Ubuntu 10.10, 11.04 and 11.10 used to work with no issues. The synthetic network driver worked and was stable.
However, we recently upgraded to a Hyper-V 2012 environment. Upon moving the exsting Ubuntu VMs (versions above) all kernel panic if the Synthetic NIC is loaded. If the legacy NIC is loaded the performance is appalling (pinging local gateway at over
2000ms).
A fresh install of those OSs also fails, with a kernel panic as soon as you include the synthetic network adapter in the VM profile. The legacy network adapter misbehaves on all of them and is not usable in production.
Note that Ubuntu 12 and 13 both work 100% fine on both Hyper-V 2008 R2 and Hyper-V 2012.
Ubuntu 10.10, 11.04, 11.10 work 100% fine on Hyper-V 2008 R2, but not on Hyper-V 2012.
We have some clients who need to run Ubuntu 10 or 11 and we have no way of continuing to provide them services using Hyper-V. Does anyone have a solution for this (please only answer if you have a tested solution, we run hundreds of VMs across many operating
systems in clustered and non-clustered environments, so we know what we are doing)?
Thanks,
- Will

Hi,
In Windows Server 2008, Windows Server 2008 R2, Windows Server 2008R2 with SP1 and Windows Server 2012 Hyper-V supported operating system list, the supported Ubuntu version is 12.04. And it mentions for Ubuntu 12.04 Integration services do not require a
separate installation because they are built-in.
Integration services here include:
Drivers: IDE, SCSI, networking, and mouse
Services: Time synchronization, operating system shutdown, and heartbeat
Since integration services are built-in from Ubuntu 12.04, so it should also built-in in Ubuntu 13 or later version.
But for previous Ubuntu version, there's no guarantee that it can work with Windows Server 2012. You may contact Ubuntu support to check whether they have some solution or extra driver package to run previous Ubuntu in Windows
Server 2012.
Thanks for your understanding and support.
Hyper-V Overview-Windows Server 2012 Hyper-V supported OS list
http://technet.microsoft.com/en-us/library/hh831531.aspx
About Virtual Machines and Guest Operating Systems-Windows Server 2008
http://technet.microsoft.com/en-us/library/cc794868(v=ws.10).aspx
Ubuntu System support
http://www.ubuntu.com/support/
Hope this helps!
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Virtual machine packaging in Hyper-V 2012?

Hi all,
I am running a custom Linux VM on Hyper-V 2012. Do we have a virtual machine packaging mechanism in Hyper-V 2012 Server, similar to OVF in ESXi?
I tried MSVMC tool. But looks like it only works for Windows guests.
Do we have any other option for getting a VM package in Hyper-V ?
Thanks in advance,
Saleem

You Export the VM - that creates a folder of files (not unlike OVF).
You can then zip this or TAR it. Hand it off, extract it, Import it on the other end.
The process is the same, but the XML is not 'ovf' - it is very similar however.
BTW - OVF is an open standard. And VMware has an proprietary implementation of it. So, taking that into consideration as well. The process is no different.
Brian Ehlert
http://ITProctology.blogspot.com
Learn. Apply. Repeat.
Disclaimer: Attempting change is of your own free will.

Hyper V 2012 R2 Cluster Host Continusly restarting

Hi,
I have a new Hyper V 2012 Data Center Edition 3 Hosts Cluster with shared SAN storage network. I I restarted one host after due to a guest VM not shutting down well, unfortunately after the host hard restart windows OS goes Getting Ready to updating
and stopping and restarting the cluster services automatically then goes system restart. with out going to windows desktop and its continually doing the same thing. MY server is HP BL 680 G7...

Hi Joy Devis,
In addition , if the node can not be fixed (cause of some corruption ), you may think of remove the node and add it after rebuilding the node .
For details please refer to the article regarding "Add a Server to a Failover Cluster":
http://technet.microsoft.com/en-us/library/cc730998.aspx
Hope this helps
Best Regards
Elton Ji
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HYPER-V 2012 R2 - EVA 4400 - Guest Centos 7 Virtual Fibre Channel

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