Hyper-V 2012 R2 - Problem accessing shared VHDX file

We're in the process of building a greenfield environment based upon a Windows 2012 R2 Hyper-V virtual infrastructure. A 12 node failover cluster (AD integrated) was build, for now 2 CSV volumes are created. We are now working on a virtual SQL 2012 Failover
Cluster on top of the Hyper-V cluster. First we created a (Gen 2) VM with Windows 2012 R2 installed on it, then we (offline) added a new VHDX file (on the same CSV volume) and in the advanced features, we select 'Enable virtual hard disk sharing'. We boot
the VM, disk manager sees a new disk, trying to initialize the disk and an error states 'The request could not be performed because of an I/O device error.'
If we disable the advanced sharing option, the disk is accessible, can be initialized and a volume can be created. Enable the feature again and we are in the same phase as where we need to (again) initialize the disk which is not possible. We have the same
problem with a Gen 1 VM.
The CSV volumes reside on a Dell Equallogic storage and are connected via iSCSI, beta of Dell Hit Kitt is installed on the Dell Blade servers (Hyper-V nodes). The CSV volumes have a 4K blocksize, could this be an issue?

Hi ,
Many thanks for your sharing .
Best Regards
Elton Ji
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Hyper-V 2012 R2 roles, access denied, failed to connect to service, AzMan....

Hi All,
I have followed dozens of tutorials to set up roles for Hyper-V, but I keep coming up short. I have no problem managing the five domain-joined 2012 R2 Core Hyper-V servers we have remotely from my Windows 8.1 PC, but I have a lab box I would like to grant
specific permissions to some Help Desk users on.
The key tutorial I have followed is from John Howard (http://blogs.technet.com/b/jhoward/archive/2008/04/01/part-4-domain-joined-environment-hyper-v-remote-management-you-do-not-have-the-requested-permission-to-complete-this-task-contact-the-administrator-of-the-authorization-policy-for-the-computer-computername.aspx),
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Digging deeper, I see dozens of failed audit Event Viewer logs saying "TestUser" is requesting READ to Service Control Manager. That sent me searching, and I found
http://arnoutboer.nl/weblog/?p=300 and http://msdn.microsoft.com/en-us/library/windows/desktop/aa374928(v=vs.85).aspx.
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Thank you in advance!

Hi Eric (cool name BTW!)
Putting them in Hyper-V Administrators is definitely not an option.
I absolutely believe Microsoft would do something to push you into buying their software; just as we had to purchase Windows 8.1 Pro to remotely manage our 2012 R2 servers. However, as far as I am seeing, AzMan is still in 2012 R2. Whether it works or not
is another story, but AzMan.msc is still there and I can run it on any of our 2012 R2 GUI installs.
Actually just found this:
http://technet.microsoft.com/en-us/library/dn303411.aspx. According to that, it has not yet been removed, but it has been deprecated. From what I am seeing, the Hyper-V portion of it is definitely broken.
I will look into the remote endpoints solution you mentioned. Thank you for the suggestion. I just recently took the plunge into learning C++, so maybe a Hyper-V manager of sorts will be an app to
attempt to write, haha.
Eric Christensen

I have lost access to a volume/partition on Hyper-V although the Vm runs the VHDX file

I have a partition on one of my drives that I am unable to access as administrator. I am running Hyper-V 2012 R2. If I try to select the drive at the command prompt I receive Access Denied. In diskpart the Volume and drive letter are shown but the Drive
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system log has no useful information other than "
Volume G: (\Device\HarddiskVolume2) is healthy. No action is needed."
Resetting attributes in diskpart, i.e. attr vol clear readonly hidden returns completed OK.
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I have used an answer by Tony Britten to achieve my required aim.
http://social.technet.microsoft.com/Forums/en-US/87679d43-04d5-4894-b35b-f37a6f5558cb/solved-how-to-take-ownership-and-change-permissions-for-blocked-files-and-folders-in-powershell?forum=winserverpowershell It used Powershell and Tony's own answer using
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Hyper-V 2012 R2 creating a new vhdx and copying from a source vhdx will physical file size reduce?

Hi,
I'm running Hyper-V 2012 R2 as part of Server 2012 Essentials.
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So my question is: the source VHDX is 900GB, the data inside the is around 350GB. What size is my new VHDX likely to be? Is it likely to reduce to nearer the actual data size?
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I am assuming that you are using dynamic virtual disks for your VHDX (they can be dynamic or fixed).
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There is a shrink action that can be done, but that will not optimize fully.
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virtual disk causing it to expand strangely.
Over time, if you are still using the backup agent (for example) that got you into this situation, you will be there again.
Brian Ehlert
http://ITProctology.blogspot.com
Learn. Apply. Repeat.

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may be worth mentioning what you did incase others are having similar problems, congrats on solving your problem though
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When I reboot my Macmini, I cant access the shared folders from any Windows machine. On the Windows machine, I'm being prompted for my password, but event re-entering my password does help to get access.
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JosoSG wrote:
When I reboot my Macmini, I cant access the shared folders from any Windows machine. On the Windows machine, I'm being prompted for my password, but event re-entering my password does help to get access.
The workaround I found is to go to the MacOSX System Preferences, Sharing, File Sharing, Options, and to uncheck and re-check the checkbox Share file and folders using SMB (Windows). Then I can access again the shared forders from a Windows machine and I'm not re-prompted for my password.
This is quite trooblesome to do that everytime I reboot my Mac. Is anybody experiencing the same pb? Any idea to fix it?
Also, since Lion, I'm experiencing some connection interruption, especially when copying big files from my Mac to a Windows machine.

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/home -- All users can Read attributes, Read extended attributes, Read permissions
/home/username -- All users have full control of this folder
Here is the script that we place in /usr/local/sbin:
#!/bin/bash
clear
username="$(whoami)"
IP="$(dig $HOSTNAME +short)"
VOLUMES="/Volumes/Workarea /Volumes/$username"
for volume in $VOLUMES ; do
    [ -d $volume ] && umount -f $volume
done
if [ "$username" != "adminuser" ] && [ "$username" != "setupuser" ]; then
    osascript -e "try" -e "mount volume \"smb://domain.com/Workarea\"" -e "end try"
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fi
killall -u $username Terminal
I am not sure what additional NTFS permissions need to be provided or if we have something that we need to edit in our script since Apple changed some of the SAMBA items in Lion.

Cross posted to here in case there is some additional ideas that come from a different community of Apple folks.

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Thank you in advance!!!!

Yes,
Give path like
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yet, so LUN provisioning is done seperately on the SAN itself. Currently i have multiple LUN hooked up to the cluster, so i'd like to be able to chose where the VM files should be stored.
Any ideas?

Fantastic! I was looking the storage pool in the wrong way the whole time. Did to much of the manual stuff on Hyper V manager where you have to specific VM physical location.. Turns out you don't have to! And your "Storage classification" is really
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CSV vhdx files and SAN optimization - sequential or random access or...?

Is there a best practice on the SAN optimization of LUNs for CSV VHDX files - e.g. sequential vs. random access?
We recently set up a small two-node Hyper-V 2012 R2 Failover Cluster. As I was creating LUNs for the CSV vhdx files, our SAN (like most, I think) has some pre-set optimization options which are more or less sequential vs. random access. There's now the abstraction
layer of shared VHDX files and the actual data those VHDXs are being used to store. Are there any best-practices for SAN optimization in this regard?
In other words, I could see:
A. Cluster-shared VHDXs are accessed (more-or-less) based on the type of data they're used for
B. All cluster-shared VHDXs are (more-or-less) accessed sequentially
C. All cluster-shared VHDXs are (more-or-less) accessed randomly.
I have one source that says that for a relatively simple SMB setup like we have that "C" is the recommendation. I'm curious if anyone else has run into this or seen an official best-practice...?

Is there a best practice on the SAN optimization of LUNs for CSV VHDX files - e.g. sequential vs. random access?
We recently set up a small two-node Hyper-V 2012 R2 Failover Cluster. As I was creating LUNs for the CSV vhdx files, our SAN (like most, I think) has some pre-set optimization options which are more or less sequential vs. random access. There's now the abstraction
layer of shared VHDX files and the actual data those VHDXs are being used to store. Are there any best-practices for SAN optimization in this regard?
In other words, I could see:
A. Cluster-shared VHDXs are accessed (more-or-less) based on the type of data they're used for
B. All cluster-shared VHDXs are (more-or-less) accessed sequentially
C. All cluster-shared VHDXs are (more-or-less) accessed randomly.
I have one source that says that for a relatively simple SMB setup like we have that "C" is the recommendation. I'm curious if anyone else has run into this or seen an official best-practice...?
There as good article published recently by Jose Barreto about CSV performance counters. See:
Cluster Shared Volume: Performance Counters
http://blogs.msdn.com/b/clustering/archive/2014/06/05/10531462.aspx
You can run DiskSPD or Intel I/O Meter yourself to see what workload you'll get @ CSV with 10+ VMs doing different I/O types. We did and you'll get
4-8KB 100% random reads and writes (just make sure you gather statistics for a long time).
So that's type of workload you could optimize your LUN @ SAN level.
StarWind Virtual SAN clusters Hyper-V without SAS, Fibre Channel, SMB 3.0 or iSCSI, uses Ethernet to mirror internally mounted SATA disks between hosts.

Scale Out File Server for Applications using Shared VHDX

Just trying to get a definitive answer to the question of can we use a Shared VHDX in a SOFS Cluster which will be used to store VHDX files?
We have a 2012 R2 RDS Solution and store the User Profile Disks (UPD) on a SOFS Cluster that uses "traditional" storage from a SAN. We are planning on creating a new SOFS Cluster and wondered if we can use a shared VHDX instead of CSV as the storage
that will then be used to store the UPDs (one VHDX file per user).
Cheers for now
Russell

Just trying to get a definitive answer to the question of can we use a Shared VHDX in a SOFS Cluster which will be used to store VHDX files?
We have a 2012 R2 RDS Solution and store the User Profile Disks (UPD) on a SOFS Cluster that uses "traditional" storage from a SAN. We are planning on creating a new SOFS Cluster and wondered if we can use a shared VHDX instead of CSV as the storage that
will then be used to store the UPDs (one VHDX file per user).
Cheers for now
Russell
Sure you can do it. See:
Deploy a Guest Cluster Using a Shared Virtual Hard Disk
http://technet.microsoft.com/en-us/library/dn265980.aspx
Scenario 2: Hyper-V failover cluster using file-based storage in a separate Scale-Out File Server
This scenario uses Server Message Block (SMB) file-based storage as the location of the shared .vhdx files. You must deploy a Scale-Out File Server and create an SMB file share as the storage location. You also need a separate Hyper-V failover cluster.
The following table describes the physical host prerequisites.
Cluster Type
Requirements
Scale-Out File Server
At least two servers that are running Windows Server 2012 R2.
The servers must be members of the same Active Directory domain.
The servers must meet the requirements for failover clustering.
For more information, see Failover Clustering Hardware Requirements and Storage Options and Validate
Hardware for a Failover Cluster.
The servers must have access to block-level storage, which you can add as shared storage to the physical cluster. This storage can be iSCSI, Fibre Channel, SAS, or clustered storage spaces that use a set of shared SAS JBOD enclosures.
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.

Access Denied when trying to access shared folders on the server with administrative privileges

I have problem accessing shared folder on the server machine from Windows 7 machine even if I try to access it with administrative privileges (server Administrator account). I will try now to explain better my situation.
In my company, we have small network infrastructure with one main server machine (HP ProLiant server) with Windows Server 2012 R2 installed and couple of desktop machines. The network is administrated by me.
On Windows Server we have installed and setup DHCP, DNS, Remote Access and Routing, File and Storage and Active Directory services. Desktop machines are having Windows 8.1 Pro, Windows 8.1 or Windows 7 Home Premium installed on them. In Active
Directory I have created domain, User groups and Users for employees in my company and so far, I didn't added desktop machines to the domain.
Also, I've created one folder on the server which should contain different projects data for network users and I have set access permissions and security for this folder and shared it on the network (I've added couple of users to one user group and I
gave Full control to this group over this folder). When I try to access this folder from network, I've been asked for login credentials (normally), where I just type in one of users username and password who has been given access permissions to (who is member
of group with full control over the folder). From Windows 8.1 Pro and Windows 8.1 machines I can access and work on this folder without any problems.
The problem comes with Windows 7 machines. On Windows 7 machines (I have also tried this with Windows 7 Ultimate in VMWare) I can access server, I can see its shares, but as soon I try to access folder I've created for projects, I get Access Denied message
with request for User login credentials. Whichever user account I use (even servers main Administrator account) I keep getting this message over and over and I'm unable to access it at all.
I have also tried to access the server through VPN (from local or outside) but I'm getting the same error again. Also I've tried to add these Windows 7 machines to the domain and login with domain user but the result is the same. Turned off both firewalls
(on server and desktop machines, which I know is unnecessary, but lets try it), still same case. I've tried couple more things with registry editor on desktop machines which I found on different forums and websites but still no luck. And now I don't know
what else I can do.
Does anyone knows what's the problem here, have I set something wrong, have not set something I should?

Hi MeipoXu,
thanks for your response. I will first answer on your question.
Yes, the main issue is that we can see the folder when we access the server but we cannot access its contents from Windows 7 machines. I have tried on two machines, one with Windows 7 Home Premium version and the other one with Windows 7 Ultimate version
and the situation is the same.
As you recommended, I've checked Network Discovery and File and Printer Sharing and the situation is next: File and Printer Sharing is turned on all layers (Private, Public and Domain) while Network Discovery is off for all layers too. I don't know if this
is normal thing but Network Discovery cannot be turned on in Windows Server (I'm able to select Turn on Network Discovery and apply the changes, but when I get back to this settings page, I again see that it's turned off, so I assume this can't be changed
at all).
I also tried with icacls in command prompt and everything seems to be ok there regarding permissions. Share permissions are set to Full control to Everyone and Security permissions are set to Full control only for Administrators and the user group I've created
for employees in my company. The confirmation for this is that on Windows 8 machines you can access this folder without any problem and without getting any message connected with access permissions with any user account within this user group. This share is
created through File and Storage Services service in Server Manager panel.
And then something came up on my mind. I went in Server Manager to check shared folder settings in File and Storage Services and under Settings page I saw that "Encrypt data access" has been enabled (I enabled this option because I thought
I will get more security with this option). I asked my self what would happen if I disable it, tried it and now everything works ok on Windows 7 machines too. Now I assume that Windows 7 doesn't have this feature implemented or there are some
settings which needs to be set on Windows 7 machines to make this encryption thing work with Windows Server. So basically, I will let this feature off for now until I find out more about it and how to implement it to work with all operating systems.
I want to thank you once more for your kind help!

Hyper-V 2012 R2 - Problem accessing shared VHDX file

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