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3
votes
2answers
5k views

Disk latency within a virtual machine

I've been looking at some performance issues on a clustered virtual machine in our organisation. Actually this problem seems to affect most of the virtual machines I have looked at. Both host and VM ...
0
votes
2answers
4k views

Can you increase the size of a VHDX in Hyper-V at a later time?

I have a Hyper-V 2012 server with a 2GB disk. Currently, there is 50GB free on this disk as the remainder is assigned to a VHDX. I need to migrate a Windows Server Installation into a new copy of ...
2
votes
1answer
205 views

What is the most reliable and effective way to compact a Hyper-V or Boot to VHD Virtual Hard Disk (VHD) file

I've seen (and tried) many ways to skin this cat, but none are quite as effective as I thought and require a number of manual steps. Here is my scenario: 1) I have installed an OS on a Dynamic ...
0
votes
3answers
1k views

Import VMs with differencing VHD into Hyper-V 2012

I've recently installed Windows Server 2012 to my test server to run Hyper-V test environment. I have bunch of old VMs which were created in Windows Server 2008 R2 Hyper-V which I didn't export in ...
1
vote
1answer
794 views

Attach storage drive in a VM via iSCSI initiator or VHDX on the Hyper-V host

Our current 200-user infrastructure is based upon XenServer and a StarWind iSCSI SAN. The C: drives for the virtual server's OS are mounted in XenServer SR volumes which are in turn virtual hard disks ...
3
votes
2answers
7k views

Recreate Azure virtual machine from existing and working disk

This morning I found that my Azure VM was dead dead. It was impossible for me to reboot or shut it down. Anyway I managed to delete the VM instance and make a snapshot copy of the VHD (who never ...
3
votes
2answers
6k views

Compact/Shrink an Expandable/Dynamic VHD to fully recover space

If I create an expandable Virtual Hard Drive (VHD) with a maximum size of 50Gb, fill it with 48Gb of files, and then reduce that amount to 25Gb, what is the most efficient and sure-fire way of ...
0
votes
1answer
144 views

How to duplicate a VHD with Windows 7 so others can use it?

I have created a VHD image with Windows 7, Visual Studio 2010 and a couple of SDKs, which took a while to install. Now I want to share this VHD with my coleagues so they don't have to go through the ...
1
vote
1answer
685 views

Extract data from VHD

I cant attach the vhd to server 2008 disk management as it says the disc is invalid But it does run in HyperV, but as I need it offline I cant extract it when the hyperV is running. Any ideas?
1
vote
0answers
2k views

Import Xen Server VHD

I am trialing using a distributed file system as the backend storage for my Xen Servers. I have set up the DFS (distributed file system) (using CentOS and GlusterFS) and everything is working ...
4
votes
1answer
902 views

Diskpart breaking drive letters after powershell script is run

I built a script that mounts (attach) a VHD using Diskpart, cleans out some system files and then unmounts (detach) it. It uses a foreach loop and is suppose to clean multiple VHD using the same drive ...
8
votes
2answers
952 views

Using Diskpart in a PowerShell script won't allow script to reuse drive letter

I built a script that mounts (attach) a VHD using Diskpart, cleans out some system files and then unmounts (detach) it. It uses a foreach loop and is suppose to clean multiple VHD using the same ...
-2
votes
2answers
64 views

Save OS .vhd for later installation [closed]

One of my system administrator had an virtual machine (of Win 7 OS) that we used as a testing OS. Now if we need to have a fresh machine, she used to give that very quickly w/o installing the OS ...
1
vote
1answer
608 views

samba server as network storage for VHD discs

I am looking for solution for 128-256 diskless HPC servers, want to create one vhd file with Windows system on it, sysprep and create 256 branching differential discs for each computational node in ...
2
votes
3answers
3k views

Windows Server 2008 R2 backup - what is generating all the change data?

We have a small, relatively idle Windows Server 2008 R2 installation that does basic file sharing and hosts Exchange for about 10 not very active users. When running a windows server backup, the ...
1
vote
3answers
1k views

RAID 10 or RAID 50 on 16x 900 GB 10K SFF disks

What type of RAID would you recommend for a single storage segment across 16 of 900 GB 10K SAS SFF disks on an EMC VNX 5100 storage unit? Disk 17 is a hot-spare. RAID 10, RAID 50 or something else? ...
2
votes
1answer
818 views

Mount VHD from Rackspace, with Windows 7 or Mountain Lion

I'm trying to explore the contents of a VHD form a backup of my Rackspace server. Any idea on how I might be able to mount it and explore it's contents? I've tried using the Computer Management tool ...
1
vote
1answer
2k views

How do I get a VHD with compression comparable to ZIP?

My Azure service depends on a huge filetree and I try to deal with that filetree using VHDs. What I currently plan to do is create a VHD file, mount it, format it to NTFS and enable NTFS transparent ...
0
votes
1answer
577 views

Do I create a fixed size or expandable VHD if I know the contents size in advance?

I want to do the following: create a VHD, copy a filetree there, then upload the VHD file to Azure blob storage, then when my Azure role starts I will download the VHD and mount it and use it as read-...
4
votes
2answers
214 views

Encrypt content of disk without entering password at boot time

I am running Linux virtual machines on a cloud provider. So effectively, the disk is a VHD file. The machine will have some sensitive information on the disk, such as certificates, passwords... I ...
1
vote
3answers
1k views

Restarting a VM from a different VHD file (but a copy of the old one)

I am wondering if anyone else has done this and has subsequently ran into any problems or if based on what I describe, anyone could suggest types of problems I may run into: I have Windows 2008 R2 ...
3
votes
0answers
2k views

Recovering a VHD after resizing it using VBoxManage

I am using VirtualBox 4.1.18 and had a virtual machine running Windows 8 RC with a single VHD, which was initially sized at 25GB (too small!). After installing the OS and some applications I ran out ...
1
vote
1answer
1k views

How to increase partition size for FAT32 volume on VHD?

I have VHD file attached as a disk (Disk 2 on screenshot below). It has only 1 partition formatted in FAT32 (so Linux clients can write something there). It got full, so I want to extend it. I used ...
16
votes
6answers
2k views

VHD network file transfer fails consistently at 4GB

This issue has been extremely frustrating for us: when transferring a large VHD (virtual hard disk) file from a Windows 7 machine over the network to a physical Windows Server 2008 machine at our ...
1
vote
1answer
992 views

How can I get past a BSOD 07b when booting from a VHD?

I thought I'd be clever and use disk2vhd at the end of my contract to backup my machine so I could easily restore it when I started my new contract, no matter what the buffoons had done with it in the ...
0
votes
1answer
433 views

Restoring Hyper-V VM without a Windows Server Backup

I have a Hyper-V host that has a bad VM that I am trying to restore from a backup copy on the SAN. I've copied over everything, created a new VM and attached the backup .vhd file but now Windows is ...
1
vote
0answers
1k views

Convert a dynamic VHD to fixed with shortest downtime and only copying used data

We have determined that dynamic (expandable) VHDs in our Hyper-V environment are causing performance slowdowns and would like to start converting the vhds attached to about 600 VMs (about 150 win2k3, ...
1
vote
1answer
281 views

Windows 7 boot manager editor as an option in boot manager

Is there any boot manager editor that I can run in DOS (possibly) before the system will load and edit boot manager itself? I would like to delete, edit VHD's and other files, copying them from the ...
3
votes
1answer
210 views

How to kick off multiple copies of a VM in Hyper-V?

I got my VHD in Hyper-V and it's running great. Since I got a great big server, I'd like to fire up a number of copies of this VHD. How do I do that? I didn't see anything obvious in the UI.
6
votes
2answers
6k views

What are the possible reasons why Hyper-V can't compact a VHD?

I am hosting several virtual machines on a host running Hyper-V Server 2008 R2. The disks were originally provisioned on a different server (2008, not R2) about 16 months ago, and were migrated onto ...
0
votes
1answer
80 views

Planning VHD-based laptop install

I am about to take delivery of a new laptop with a 750GB HDD. I will be using Win7 as the base OS (as a "real" installation, direct to the tin). The base install will probably have Visual Studio ...
1
vote
2answers
1k views

Convert physical centos to VHD

Is there any software to convert physical machine with centOS operationg system to VHD image?
1
vote
0answers
97 views

All BCD edits lost after reboot

I'm trying to create a system that will use native boot VHDs, as described on Technet. I followed that entire whitepaper throughout, making modifications for my system (I have three VHDs to boot from)...
0
votes
1answer
190 views

Missing files in Windows 2008+VHD+SSD

I have running Windows 2008 Server machine on my SSD disc from VHD file. Today while I was working with Windows the 30% of files disappeared. There are only folders left and no files. I can't find ...
1
vote
2answers
184 views

How to garantee the state of a VM? Make sure Software doesn't change

I want to make sure that I can stop a machine, on Hyper-v with windows VMs, and then I can start it, being sure that nothing changed inside the VHD. Is this possible? Can I make like an MD5 of "C:\...
3
votes
1answer
2k views

How to use sysprep for a vhd

We have a vhd copy of physical a windows vista machine. Since we don't want to touch the physical machine, we like to run sysprep on the vhd. Unfortunately this vhd does not boot on hyper-v. Is there ...
2
votes
1answer
372 views

Is there a way to capture a Hyper-V VHD image of a running Linux (Centos) server?

I have a linux server running Centos (actually its a PBX running Trixbox) that I want to migrate to a Hyper-V based VM so that the physical server can be repurposed. Is it possible to capture a VHD ...
3
votes
2answers
296 views

Does a dynamic VHD have any space overhead

Basically, does a full (say) 1TB VHD file occupy more than 1TB of disk space on the host device?
1
vote
1answer
1k views

WinPE diskpart can't attach vdisk

I created WinPE 3.0 and didn't modify it in any way. I want to attach a vdisk (.vhd file) while running WinPE but I can't attach it, no error is shown, no indication that diskpart didn't attach it, it ...
0
votes
3answers
2k views

V2V conversion - linux distro from .vmdk to XenServer .vhd

I am running XenServer for virtualization. I have a linux distro with Big Blue Button (http://bigbluebutton.org/) in .vmdk format that I'd like to run on my XenServer (it uses .vhd files). Problem is ...
1
vote
1answer
5k views

How can I mount a XenServer VHD from an iSCSI SR in Ubuntu?

I need to get files from a Linux VM that was hosted on an iSCSI volume attached to a XenServer host, but I no longer have any XS hosts around (they've all been converted to VMware). I've already ...
1
vote
4answers
746 views

Does SQLIO lie when run from a Hyper-V guest on a VHD?

SQLIO seems like a useful tool. I thought it would be interesting to try to measure the speed difference between a physical disk and a VHD. So I ran SQLIO on the Hyper-V host on the physical drive. ...
1
vote
2answers
848 views

VHD does not automatically reattach on restart

I have some virtual hard disks mounted on my company's web server, but any time I have to reboot it to install Windows Updates, I have to manually reattach the VHDs. I'm guessing there's no built-in ...
0
votes
1answer
2k views

VirtualBox VHD Image asking for Product Key

we used the tool from MS here to create a .VHD of an old XP laptop that has some important software on it. We intend to retire the laptop and use the VM exclusively so we can back it up, and keep it ...
1
vote
1answer
6k views

(0xC03A0014) Failed to add device 'Microsoft Virtual Hard Disk'

We had Windows 2008 SP2 Server. It was crashed due to mother board problem. After we got new motherboard we have installed Windows 2008 R2. Now when we try to attach Old VHD File we are getting ...
9
votes
2answers
7k views

Change the UUID of a VHD

How can I change the UUID of a VHD-file? My problem is that VirtualBox won't accept the VHD-file if it has already been added. But I am moving VHD disks between work/home and cloning them (and ...
0
votes
1answer
1k views

how to make a .vhd file of an OS?

I have microsoft virtual PC 2007 installed in my windows 7 OS. I configured a new system from there giving RAM & HDD from the available installed OS (WIN 7). but when i started a my Virtual PC, ...
6
votes
1answer
8k views

Disk2VHD and Hyper-V

I want to virtualize a physical machine and I used Disk2Vhd to convert the Hard drive to a .vhd file. My issue is that when I attach this vhd in Hyper-V, and try to install "Integration Services", ...
0
votes
1answer
660 views

Is it possible to dual boot osx using a VHD as the second partition?

I know this can be done using Hyper-V but is this possible using vmware or something similar with OSX?
1
vote
2answers
1k views

Microsoft SC VMM 2008 R2 doesn't have option to compact virtual hard disk

I can't figure out how to shrink a VHD using Microsoft System Center Virtual Machine Manager 2008 R2. Viewing the article Shrink your VHD size seems like this would be simple to do. However I don't ...