How do you change HOST CACHE setting on VM Data Disk?

Question

_{Sunday, July 28, 2013 5:55 PM}

I'd like to change the host cache setting from None to ReadOnly.  I tried the powershell Set-AzureDataDisk but nothing happens.  When I run the command I get no error and the c: prompt is returned.  Any help much appreciated. 

See below:

PS C:\> Select-AzureSubscription "MySubscripton" | Get-AzureVM "myapp1.cloudapp.net" -name "MyVM" | Set-AzureDataDisk -LUN 2 -HostCaching ReadOnly | Update-AzureVM

All replies (4)

_{Sunday, July 28, 2013 6:13 PM ✅Answered}

Try using intermediate objects rather than piping so you can ensure that they're populated correctly after each command. I think Get-AzureVM requires the -Service parameter too: http://msdn.microsoft.com/en-us/library/windowsazure/jj152849.aspx.

Note that you can also change the cache setting using the management portal.

_{Sunday, July 28, 2013 10:20 PM}

Try using intermediate objects rather than piping so you can ensure that they're populated correctly after each command. I think Get-AzureVM requires the -Service parameter too: http://msdn.microsoft.com/en-us/library/windowsazure/jj152849.aspx.

Note that you can also change the cache setting using the management portal.

Thanks Tabrez!  After further reading I found I had to import my azure subscription and then select it.  After that the command worked.

Just curious....where in the management portal can you change the cache setting?  I looked everywhere for it with no luck. 

_{Sunday, July 28, 2013 11:13 PM | 3 votes}

Go to Virtual Machines, and then select the Disks tab. After you select a disk that's attached to a VM, you can select the Edit Cache option.

_{Sunday, July 28, 2013 11:21 PM}

Got it!  Wow, I looked under Virtual Machines 20 times and didn't notice that option.  I kept drilling into the VM of interest looking for a disk option versus looking on the top page.  Ugh!  I guess the good news is I got to learn a little powershell.  :)  Thanks much!