Archive for February, 2011


Details

vCenter Server supports vSphere Web Access and runs it by default. Users who have network access to the vCenter Server machine can open Web Access by entering http://<vcenter_server_ip>/ui in a Web browser.

Solution

If you want to restrict users from accessing Web Access, you can stop and disable the service so that it does not start when you restart your vCenter Server machine, or you can delete Web Access from vCenter Server.

Disable the vSphere Web Access service on vCenter Server

  1. On the vCenter Server machine, select Start > Run.
  2. Type services.msc and click OK.
  3. Stop the VMware VirtualCenter Management Webservices service.
  4. Right-click VMware VirtualCenter Management Webservices and select Properties.
  5. In the General tab, select Disabled from the Startup type drop-down menu and click OK.

Delete vSphere Web Access from vCenter Server

  1. Stop and disable the vSphere Web Access service.
  2. Use Windows Explorer to open C:\Program Files\VMware\Infrastructure\tomcat\webapps and delete the ui directory.
  3. (Optional) Use Windows Explorer to open C:\Program Files\VMware\Infrastructure\tomcat\work\Catalina\localhost and delete the ui directory.

Ref : Vmware KB

How to delete GPT Protective Partition

Posted: February 20, 2011 in Windows
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In Windows XP Professional, if you cannot access or modify GPT disk, you can convert a GPT disk to MBR by using the clean command in DiskPart, which will remove all data and partition structures from the disk.

1. You might see USB Drives in GPT status.

2. Go to DOS command line (click on “Start Menu”, then “Run”, type in “cmd” in textbox, and hit “OK”)

  • Type in “DiskPart” in command line.
  • Type in “list disk” in command line to show all disks in this machine.
  • Use “select” to set the focus to the specified partition.
    For example “select disk 1″.
  • Use “clean” command to remove GPT disk from the current in-focus disk by zeroing sectors.

3. Go back to Disk Management, you can see USB disks are “unallocated” now. Right click on disk info, choose “Initialize Disk”.

4. Choose all drives in USB and initialize them.

Warning: This command will erase all data on the disk, so please backup your data first.


when I was trying  to do a storage vmotion ; vmware say that the machine has “virtual disk in link-cloned mode that prevent migration”. Checking in the datastore for those VM I’ve found some xxxxxx-0000x.vmdk and xxxxxx-0000x-ctl.vmdk files.The strange thing is I could not see any Spanshot in the snapshoy Manager .

Linked clone error

 

 

 

 

 

 

 

 

 

 

 

I’ve tested a “cold” migration of the disks but it seems that VMWARE cannot migrate the storage of those VM in any way.

Solution :

Took another Snapshot and as soon I did that I can see the old snapshot hanging there !! Check out the Below Image .

Then I just delete all snapshot and was able to do the SVMOTION again .

Snapshot Manager status after Taking one dummy snapshot

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

After Some research on Vmware KB and blogs I came accross with the following reasonfor this error . It seems that after I svmotion VM between 2 different Datastore  the VM is linked to the new datastore but also to the old datastore so I cannot vmotion again. As soon as I just create a snapshot the VM lose the “link” to the old datastore.Then when I delete all snapshot it basically delete the link as well.

Mohamamd.


Tips and Tricks for Effective Memory Management
This white paper provides information on the key memory metrics you should use for VM (virtual machine) memory allocation sizing and performance issue monitoring, as well as recommendations on how to make these assessments when large memory pages are in use. 

This article is from vkernel . I found this simple and easy to understand.For more information check on their website http://www.vkernel.com

I will Also suggest to read this Resourse Management Guide from Vmware . Specially the CPU and Memory resourse part.