Add more HDD for VM in ESXi5

bmkhoi used Ask the Experts™
Dear all Experts,
I have 01 ESXi5 host with total capacity is 9TB (RAID5, 2TB x4) and 01 Virtual Machine running on Windows Server 2008 R2 Standard.
Now I want to add more HDD for that Virtual Machine with capacity is 8TB.
But ESXi5 and Windows Server 2008 R2 are not allow me to add, it just allow me to add maximum capacity is 2TB.
Do you have any ideas or solutions for me to solve this issue?
This virtual machine will become fileserver.
Below is picture of my ESXi5 and VM.
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Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Correct, the maximum virtual disk for ESXi 5.0 is 2TB-512 bytes.

Why not create and Add TWO (2) 2TB virtual disks to the virtual Machines, and use Windows 2008 R2 Dynamic Disks to SPAN the two disks to create a 8TB disk for the OS.
Neil RussellTechnical Development Lead

The prefered way to do this is to set your storage up to present an iSCSI target of the 8TB, not managed by ESXi, and use windows 2008 server iscsi to attach directly to the iSCSI target. You can then have your full amount of storage that you require in a single target disk


Dear Hanccocka,

If I decided to use Dynamic Disks to SPAN the 04 disks, is there any issue should be careful, it's seem your solutions suitable for me.

Dear Neilsr,

Last time I also have same issue when Windows Server 2008 Standard R2, automatic divide my partition to 2TB active and 6TB not available, so how can I mount fully 8TB with Windows Srv 2008 R2 Standard, do you have any ideas ?
Paul SolovyovskySenior IT Advisor
Top Expert 2008

You can span the disks via MS OS settings but if something goes awry with one of the VMDKs your volume may get corrupt.
VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017
it's the only solution available to you I'm afraid unless you consider RDM or Microsoft iSCSI solution from an iSCSI SAN, that you may not have available.

Just make sure you update your documentation.

the other method is to create your 2TB virtual disk, and use Linked Mode in the OS, to add another 2TB drive to a folder within the OS drive.


e:\docs and add the additional 2TB drive to e:\docs

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