OVM 3.1.1 shared virtual disk

Hi All,
Is it possible to configure shared virtual disk in OVS 3.1.1 as it was in OVS 2.x ?
Thanks in advance

Well, I haven't used MS cluster, but I'd think it should work, since the same disk is presented to each VM it is attached to and it is absolutely transparent to the guests where this disk comes from. All that the guests are seeing is the same device, where they all can operate on at the same time.

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ISCSI shared virtual disk

Hey,
I had on my synology a iSCSI Lun created. Now I connect this iSCSI lun with my Windows Server 2012R2. Create on this connection a VHDX virtual harddisk.
When I try to ad this vhdx file to an VM as shared disk I become the error that the storage is not the right for shared virtual disk.
Thanks for help
Stefan
Viele Grüße Stefan
Kontakt unter [email protected]

Hey,
I had on my synology a iSCSI Lun created. Now I connect this iSCSI lun with my Windows Server 2012R2. Create on this connection a VHDX virtual harddisk.
When I try to ad this vhdx file to an VM as shared disk I become the error that the storage is not the right for shared virtual disk.
Thanks for help
Stefan
It does not work this way... Making long story short you need to connect to LUN, create CSV on top of it and create shared VHDX there. For details see:
http://blogs.technet.com/b/storageserver/archive/2013/11/25/shared-vhdx-files-my-favorite-new-feature-in-windows-server-2012-r2.aspx
http://www.aidanfinn.com/?p=14936
http://technet.microsoft.com/en-us/library/dn265980.aspx
Hope this helped! Good luck! :)
StarWind VSAN [Virtual SAN] clusters Hyper-V without SAS, Fibre Channel, SMB 3.0 or iSCSI, uses Ethernet to mirror internally mounted SATA disks between hosts.

OVS 2.2 Shared Virtual Disk

I have created a Shared Virtual Disk and created a filesystem on it via one of my VMs. I have also mounted it on another VM. Anything that VM#1 creates on the shared disk can't be seen by VM#2 and vice-versa. Is this the way the shared disk is supposed to work?

ratdude wrote:
I have created a Shared Virtual Disk and created a filesystem on it via one of my VMs. I have also mounted it on another VM. Anything that VM#1 creates on the shared disk can't be seen by VM#2 and vice-versa. Is this the way the shared disk is supposed to work?You have to run a clustered filesystem like OCFS2 on both machines for changes to be visible on all nodes at the same time. Just having the disk shared is not enough. This is exactly the same as connecting two physical machines to the same hard drive. :)

Shared Virtual Disk

When creating a virtual shared disk oracle VM Manager -> Resources -> Shared Virtual Disks the only option you have are
Virtual Disk Name:
Virtual Disk Size:
Server Pool name:
Group Name:
Description:
My question is how do you know what this virtual disk is mapped to? i.e. SAN, NFS, LOCAL DISK?
Also how do you specific what disk to use ideally I would like the virtual disk to use a 150GB LUN from my SAN?

With the exception of multipath devices (and plain files obviously), there is no user interface for other kinds of devices for back end storage for DomUs, but Xen supports them. You have to edit the config yourself. They are in /OVS/running_pool/<name>/vm.cfg
Look for the disk = line and edit it to something like this:
disk = [
'phy:/dev/DomUDisk2/LVOracleApp,xvda,w',
In this case, I used a local LVM logical volume as back end storage (/dev/DumUDisk2) and I mapped it to the paravirtual device in the vm (xvda). You have to do something similar. I don't have a SAN/HBAs, but assuming your LUN shows up on Dom0 as /dev/sda, you might give a try to something like:
disk = ['file:/OVS/running_pool/myvm/System.img,hda,w', # or whater you want to do for the boot/root disk
*'phy:/dev/sda,xvda,w',* ]
Once this works, you might want to configure multipath if your hardware supports it.
Best of luck, keep us posted.

Shared virtual disks and linux installation

Dear all,
when i add some shared virtual disk to the virtual machine and start the instsallation of oracle linux i face a major performance issue and the system takes a long time to boot and linux cd's and start the instsallation process, i don't know why this issue is happening to me but it is giving me alot of troubes. i had to buy a new machine with husge configuration to try oracle VM and i feel like i bought for no benifits at all
your help will be appreciated/

Avi,
Actually, if you have one server HA would do nothing for you. You need at least two servers for HA to be useful.
Also I would believe that since you only have one 500 gig drive I am sure it is a sata drive that you are using. That drive is running your Dom0 plus all other DomU's. The shared drive is a file on the filesystem under the /OVS directory your DomU system drive is a file on the /OVS filesystem. While your experience is still a little odd it would run but be really slow. You say that without the shared drive it runs OK so my first thought would be to drop the shared disk and recreate it since it sounds like you have nothing on it at this point in time anyway.
Could be that the file for the shared disk became corrupt with something else you had done.

Cannot see more than one shared virtual disk at a time

I have multiple virtual disks configured and as I add them to the specific virtual machine im using it modifies the vm.cfg as follows:
disk = ['file:/OVS/running_pool/110_openfiler/System.img,hda,w',
',hdc:cdrom,r',
'file:/OVS/sharedDisk/openfiler-ocs-u01.img,hdd,w!',
'file:/OVS/sharedDisk/openfiler-ocs-u02.img,hde,w!',
'file:/OVS/sharedDisk/openfiler-SAN-test.img,hdf,w!',
when the machine boots up the contents of /dev only contains the shared drive hdd, thus I cannot see hde or hdf.
One thing I tried was to edit the vm.cfg after adding the shared drives to the machine to mimic:
disk = ['file:/OVS/running_pool/110_openfiler/System.img,hda,w',
',hdc:cdrom,r',
'file:/OVS/sharedDisk/openfiler-ocs-u01.img,sda,w!',
'file:/OVS/sharedDisk/openfiler-ocs-u02.img,sdb,w!',
'file:/OVS/sharedDisk/openfiler-SAN-test.img,sdc,w!',
This allows me to see all three drives when I issue fdisk -l
Disk /dev/hda: 105.2 GB, 105226698752 bytes
255 heads, 63 sectors/track, 12793 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hda1 * 1 13 104391 83 Linux
/dev/hda2 14 12539 100615095 83 Linux
/dev/hda3 12540 12793 2040255 82 Linux swap / Solaris
Disk /dev/sda: 20.9 GB, 20971520512 bytes
255 heads, 63 sectors/track, 2549 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 1 2550 20480000 ee EFI GPT
Disk /dev/sdb: 20.9 GB, 20972569088 bytes
255 heads, 63 sectors/track, 2549 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 2550 20481024 ee EFI GPT
Disk /dev/sdc: 104.8 GB, 104857600512 bytes
255 heads, 63 sectors/track, 12748 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdc1 1 12749 102400000 ee EFI GPT
but then my question becomes... could this cause any potential problems?

I found that there are 4 IDE disks and 7 SCSI disks at most for HVM guest on Oracle VM 2.1 version. For IDE disks, The available disknames are from hda to hdd; and for SCSI disks, are from sda to sdg. you may make test about it. :)
Message was edited by:
Changhai

Can not import Share virtual disk

I'm using ocfs2 filesystem
to creating a virtual shared disk oracle VM Manager -> Resources -> Shared Virtual Disks
Server Pool name: mypool
Group Name:
Virtual Disk Name: sharedisk
Virtual Disk Size: 5000
Description:
Can not selected Share virtual disk files which is null when import.what is error?
thank

Hi,
please clarify your error a little bit more.
a.) Did the create work correctly? Or did you get an error? If yes what error?
b.) Did you have problems attaching the Shared Disk to the VM?
Sebastian

Error (23317) The operation Change properties of virtual machine is not permitted on a virtual machine that has shared virtual hard disks. Recommended Action The operation Change properties of virtual machine is not permitted on a virtual machine that h

Experts !
Error (23317)
The operation Change properties of virtual machine is not permitted on a virtual machine that has shared virtual hard disks.
Recommended Action
The operation Change properties of virtual machine is not permitted on a virtual machine that has shared virtual hard disks.
Is this limitation by design? If we have a shared VHDX between two VMs, then I am not able to change the VM properties from SCVMM.
SCVMM 2012 R2 with Windows Server 2012 R2 Hyper-V.
Appreciate any help !
Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence.
InsideVirtualization.com

Hello,
that is a VMM issue.
If you did not deploy your virtual cluster from a VMM service template, VMM doesn't recognize the configuration.
Until MS got it fixed, you could use the workaround from system center central:
http://www.systemcentercentral.com/tag/shared-vhdx/
This posting is provided >AS IS< with no warranties.

Cluster Quorum Disk failing inside Guest cluster VMs in Hyper-V Cluster using Virtual Disk Sharing Windows Server 2012 R2

Hi, I'm having a problem in a VM Guest cluster using Windows Server 2012 R2 and virtual disk sharing enabled.
It's a SQL 2012 cluster, which has around 10 vhdx disks shared this way. all the VHDX files are inside LUNs on a SAN. These LUNs are presented to all clustered members of the Windows Server 2012 R2 Hyper-V cluster, via Cluster Shared Volumes.
Yesterday happened a very strange problem, both the Quorum Disk and the DTC disks got the information completetly erased. The vhdx disks themselves where there, but the info inside was gone.
The SQL admin had to recreated both disks, but now we don't know if this issue was related to the virtualization platform or another event inside the cluster itself.
Right now I'm seen this errors on one of the VM Guest:
Log Name: System
Source: Microsoft-Windows-FailoverClustering
Date: 3/4/2014 11:54:55 AM
Event ID: 1069
Task Category: Resource Control Manager
Level: Error
Keywords:
User: SYSTEM
Computer: ServerDB02.domain.com
Description:
Cluster resource 'Quorum-HDD' of type 'Physical Disk' in clustered role 'Cluster Group' failed.
Based on the failure policies for the resource and role, the cluster service may try to bring the resource online on this node or move the group to another node of the cluster and then restart it. Check the resource and group state using Failover Cluster
Manager or the Get-ClusterResource Windows PowerShell cmdlet.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-FailoverClustering" Guid="{BAF908EA-3421-4CA9-9B84-6689B8C6F85F}" />
<EventID>1069</EventID>
<Version>1</Version>
<Level>2</Level>
<Task>3</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000000</Keywords>
<TimeCreated SystemTime="2014-03-04T17:54:55.498842300Z" />
<EventRecordID>14140</EventRecordID>
<Correlation />
<Execution ProcessID="1684" ThreadID="2180" />
<Channel>System</Channel>
<Computer>ServerDB02.domain.com</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<Data Name="ResourceName">Quorum-HDD</Data>
<Data Name="ResourceGroup">Cluster Group</Data>
<Data Name="ResTypeDll">Physical Disk</Data>
</EventData>
</Event>
Log Name: System
Source: Microsoft-Windows-FailoverClustering
Date: 3/4/2014 11:54:55 AM
Event ID: 1558
Task Category: Quorum Manager
Level: Warning
Keywords:
User: SYSTEM
Computer: ServerDB02.domain.com
Description:
The cluster service detected a problem with the witness resource. The witness resource will be failed over to another node within the cluster in an attempt to reestablish access to cluster configuration data.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-FailoverClustering" Guid="{BAF908EA-3421-4CA9-9B84-6689B8C6F85F}" />
<EventID>1558</EventID>
<Version>0</Version>
<Level>3</Level>
<Task>42</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000000</Keywords>
<TimeCreated SystemTime="2014-03-04T17:54:55.498842300Z" />
<EventRecordID>14139</EventRecordID>
<Correlation />
<Execution ProcessID="1684" ThreadID="2180" />
<Channel>System</Channel>
<Computer>ServerDB02.domain.com</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<Data Name="NodeName">ServerDB02</Data>
</EventData>
</Event>
We don't know if this can happen again, what if this happens on disk with data?! We don't know if this is related to the virtual disk sharing technology or anything related to virtualization, but I'm asking here to find out if it is a possibility.
Any ideas are appreciated.
Thanks.
Eduardo Rojas

Hi,
Please refer to the following link:
http://blogs.technet.com/b/keithmayer/archive/2013/03/21/virtual-machine-guest-clustering-with-windows-server-2012-become-a-virtualization-expert-in-20-days-part-14-of-20.aspx#.Ux172HnxtNA
Best Regards,
Vincent Wu
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.

The storage where the virtual hard disk is located does not support virtual disk sharing

Hi everyone,
I deployed 2 hyper v vitual machines a while ago, and i did that because I needed to test my current game Project, which is an
online game. However, i've had some problems with my Windows installation then I had to reset the pc by making it a refresh
install. I still have the hyper v virtual disks, but i cannot attach it to a new hyper-v virtual machine. it pops up this message:
"the storage
where the virtual hard disk is located does not support virtual disk sharing". I dont know anything about virtual machines, so I
didnt know I had to make the disk sharable. How can I force to attach the hard disk to a new hyper-v? I dont want to go t
hrough the whole proccess of installing the operating system all over again and updating it....
Any help is greatly appreciated!
Thanks in advance,
Romulo Romero

Hi MrDebugging,
>>
When I Try to add a SCSI Controller, and then I click browse to add a UNC I get this:
C:\Users\Public\Documents\Hyper-V\Virtual hard disks\ClienMachine.vhdx
but I tried placing in different location, and the same problem occurs!
By the way, Im not on a server , I am a domestic user and I am running it on my
Windows 8.1
According to the error message , it seems that it is not a permission issue .
The VM is Gen 1 or Gen2 ?
Generally the error message occurs when you enable "shared vhdx" on standalone/client hyper-v host :
Please try to attach the VHDx file to IDE controller if it is a Gen 1 virtual machine (because only the SCSI controller has the option "virtual hard disk sharing" and Gen 1 VM only can boot from IDE )
All in all , please do not use this feature without CSV or Scale-Out File Server with SMB 3.0 on file-based storage .
If it is not the case , please detail steps what you did .
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] .

OVM-4006 The largest virtual disk that can be allocated is 78,027 MB

G'Day List,
Greetings and best wishes.
I am hoping someone will be able to help me here:
PROBLEM:
I tried to "Create New Virtial Disk" for a particuler VM and it error out as shown in the subject line.
Figuring that it was a space issue, I stopped another VM with a 800GB D drive - Deleted the 800GB
drive and attempted to "Create New Virtual Disk" of only 580GB and got the same error.
I do not believe it has to do with the SAN so I am looking for an OVM reason for the error and a solution.
Anyone?
Thanks
Ferg

Hi,
When you say - deleted 800 Gb drive does that mean taht you deleted the storage space for that virtual machine , or completely deleted the machne from amanger
If you have 2.2 version for OVM server - it displays the info about max memory and max disk space available to use .
If you are getting space related error make sure that you delete the stuff from the server and not the entry only from the manager database.
Try selecting a VM which you want or plan to delete to free up the space
Go to 'Actions' Menu and select delete
next page - Check " Remove image files from storage"
And hit "delete"
This will remove the entry from the server as well and free up the space.
you can also login to the server and do "# df -h" .This will also show you how much sapce is really available on the disk .

OVM Sparc - Can't discover local disks

Chassis 6000
10 Blades T4-1B
Controller LSI logic with 2 local 600gb disks per blade.
I understand that FC and ISCSI storage generic drivers are a big no at the moment for sparc, I currently have the storages attached to one blade and shared via nfs (a blueprint for tunning nfs in 11.1 would be great also).
The problem is, I can't even discover the local disk, no raid, so OVM should discover the secondary disk by itself right? Disk is completely cleared as recommended, but OVM still fails to discover anything.
Help or suggestions will be greatly appreciated.
Thanks

The answer is "not yet" with the OVM manager. The currently shipping support for Oracle VM Manager on SPARC systems is only for NFS.
If you are willing to work via CLI outside Oracle VM Manager, you can add local disks to the guest. You have to expand the VM line in the GUI so you can see the "ID" field, which is the actual name of the domain in the ldoms manager. For example, you may name the guest 'mydomain', but the actual name in 'ldm list' will be a long hex string that is a UUID. You can use 'ldm add-vdsdev' to define virtual disks, and then 'ldm add-vdisk' to add that disk to a guest. The other complication is that the domain does not actually exist until you start it from the GUI, so if you stop the guest and later restart it, all "extra" devices not known to OVM Manager won't be there and would have to be added again. The other obvious restriction is that you can not migrate a domain if it has local disks.
For reference: if you go to the Oracle VM Server for SPARC documentation at Oracle VM for SPARC Documentation and then select View Library for Release 3.0 at http://docs.oracle.com/cd/E37707_01/index.html
you will see a page with all the documents for the current release. Pick the "Oracle VM Manager 3.2: Quick Start Guide for Managing Oracle VM Server for SPARC" at http://www.oracle.com/technetwork/server-storage/vm/ovm3-sparc-quick-start-guide-1900072.pdf
I hope this helps explain the situation.
Jeff

Can Windows Server Backup spread a single backup job across multiple disks if they are not set up as a virtual disk?

This may be a dumb question, but I can't seem to find any definitive information after having done many, many searches. Short question is - can Windows Server Backup spread a single backup job across multiple disks if they are not in a storage
pool or some other RAID/JBOD structure?
Background:
I'm running Server 2012 Essentials with all Windows Updates installed. I have been backing up approx 2.8TB of data (Bare Metal Recovery, C:, S: (shared folders), and system reserved) for the past year+ onto a storage pool made up of two-2TB external
USB drives. Backup is slow (takes approx 1.5 days to complete), but generally works. Not surprisingly I was constantly getting capacity low messages so I decided to increase my backup storage pool by adding a 3TB drive and another spare 750GB drive
for a total of 7.75TB. Instead of having four separate external USB enclosures, I bot a 4-bay enclosure - Startech.com model #S3540BU33E to simplify this (or so I thought!).
The first problem I had was adding the two new drives to the existing storage pool. I think that is because the Startech uses a JMicron USB controller that reports identical uniqueid's for all drives so only one shows up in the GUI interface for creating storage
pools. After doing research on this, I set up a new storage pool and virtual disk using all four drives via Powershell and thought I was good. However, when the backup ran, it failed after filling the first drive, saying there was no remaining capacity. In
reality there were three remaining empty drives and there storage pool reported almost 5TB of avail capacity. I assumed this was due to the identical uniqueid issue so I decided to try a different tactic.
Instead of using a storage pool that combines all four disks into one virtual disk, I just added each of them to Windows Server Backup as individual drives thinking it would manage them collectively. I.e., when a drive filled up during a particular backup,
it would just start using the next drive and so on. Apparently this was a foolish assumption because the backup failed again as soon as the first disk filled up.
So now I don't know if this is still an issue with the identical uniqueid's or if Server Backup actually can't spread a single backup across multiple individual drives that aren't in a pool or other virtual disk implementation. Hence, my original question.
My guess is that it does *not* spread them across individual disks, but I just wanted to get confirmation.
Thanks

Mandy,
Thank you for following up on my question.
Unfortunately the article you referenced doesn't address what I am trying to accomplish.
The article focuses on saving the same backup job to multiple disks and rotating the disks between on and offsite for enhanced protection. However, it still requires that an individual backup job fits on a single disk.
What I am trying to determine is if a single backup job can span across more than one physical disk (during the backup process) without those physical disks being in some type of virtual disk implementation (e.g., storage pool, RAID, etc.).
Thanks,
Gerry

Oracle VM 2.2: why virtual disk must be 1GB or larger?

I'm using Oracle VM 2.2. When I try to create a virtual disk using OVM Manager it requires that the disk be at least 1GB in size. Is there a reason for this? Or is it an arbitrary limit enforced by OVM Manager?

OK, but it seems like this arbitrary limit provides no benefit. In my case I actually do want a small disk image. I want to use it to pass small amounts of configuration information to a VM at startup, but it seems like this won't be possible via OVM interfaces (I can't create a small private disk image, I can't import an existing disk image, etc). So it looks like I'll have to go under the covers and manipulate the VM image directly.
Am I missing anything? Does OVM Manager provide any interfaces for passing configuration information to a VM at startup?

Two virtual disks with same name - how to safely delete one of them

I mistakenly created a disk in a repository that uses the same friendly name as an existing disk that is in use by a virtual machine.
Can I safely remove the second disk with out OVM trying to delete the original disk as well?
Thanks

Yes, you will be safe, bacause OVM uses the disk ID to identify the disk.
You can also use the little triangle just to the left of the virtual disk name. It will open a message saying if disk is in use by a Virtual machine.
Also, the GUI will not let you delete a disk which is in use.
If you want another way, you can "edit" the disk in the OVMM GUI, read its ID, cancel the edit, and go delete it from a root command shell on the VM server.
br.

OVM 3.1.1 shared virtual disk

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