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Thread: Getting wrong free space on Hitachi AMS2500 with ESXi 4.1 HDP on USP VM

  1. #1
    Join Date
    Nov 2011
    Posts
    61

    Getting wrong free space on Hitachi AMS2500 with ESXi 4.1 HDP on USP VM

    We are having three instances of Windows 2003 VM with RDM is having below mentioned issue. there was prompt from the guest through SCOM saying that the guest was running out of the space and it was low on the space. My computer is showing the hard disk is having more free space rather than that of the actual hard disk provided. RDM was of 100GB and there was free space of 192GB. When I given a look on diskpart it was displatying 100GB in size and free space of 7MB. I need to reboot the computer to fix the issue.

    Array: HDS USPVM and AMS 2500 - Tiered Storage model w/ HDP.
    Host: VMware ESXi 4.1 (round robin)
    Guest: Windows 2003 SP2 - 32bit
    Welcome for any help.

  2. #2
    Join Date
    Jul 2011
    Posts
    328

    Re: Getting wrong free space on Hitachi AMS2500 with ESXi 4.1 HDP on USP VM

    Well I am suspecting that the issue has been associated with ESX. Before I comment regarding solution I wanted to know whether RDM is into physical mode or virtual mode.

  3. #3
    Join Date
    Nov 2011
    Posts
    61

    Re: Getting wrong free space on Hitachi AMS2500 with ESXi 4.1 HDP on USP VM

    The RDMs are into Physical mode and they are assigned with the same host group as that of the data stores and they are on host group. The host group option was not selected for V-vol expansion. This particular setting was having consistent performance for ESX cluster of the six hosts. Can you tell me why I am suffering from the above mentioned issue?

  4. #4
    Join Date
    Jul 2011
    Posts
    555

    Re: Getting wrong free space on Hitachi AMS2500 with ESXi 4.1 HDP on USP VM

    After going through the problem I think the issue has been associated with ESX driver or the current version of the patch are causing the issue. the issue is localized on the cluster.

  5. #5
    Join Date
    Jul 2011
    Posts
    376

    Re: Getting wrong free space on Hitachi AMS2500 with ESXi 4.1 HDP on USP VM

    According to me it will be nice to see RDMs are mapped to the physical hosts and see whether issue is persisting or not. If there is no issue with any of the host then there could be an issue with VMware itself. If all the issue are having the same issue then I am wondering that metadata might be causing the problem. If still the thing is not about to resolve then there is an issue with operating system which you have installed.

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