Vmware vSphere 5 Essentials Plus and creating a disk bigger the 2 terabytes

cciavola
cciavola used Ask the Experts™
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I have read where you can create a disk bigger the 2 TB with VMware version 5. not sure how.  I have a delll r510 with a enclosure with 15, 600 gig drives. using raid 6. I can see 7 tb's in vsphear.But  I can only create 2tb disks. Is there something in Vsphear that allows you to create drive bigger then 2 tb's. the goal would be one 7 tb drive on a virtual windows 2008 server..
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I'm still using ESX 4 but my solution was creating 1.9 TB volume and expanding it.
VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017
Commented:
Unfortunately, the virtual disk (vmdk) limit is still 2TB-512bytes.

you can create large VMFS datastores up to 64TB.

RDMs can be larger than 2TB and supported now in ESXi 5.0.

Author

Commented:
You talking about expanding it in Vsphear, through edit settings, disk provisioning? If so it will not go beyond 2048 GB.
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I was referring to the data store volume.
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
That's BECAUSE 2TB IS THE MAX!
You will see the extent feature to expand your volume.
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017
Commented:
Page 4
http://www.vmware.com/pdf/vsphere5/r50/vsphere-50-configuration-maximums.pdf


File size 2TB minus 512 bytes

if you have a SAN you can create a Raw Device Mapping size (physical compatibility) 64TB
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
Unless you have a SAN - No.

OR, create 6 x 2TB virtual disks in the VM, and SPAN them using Windows 2008 Disk Management.

Author

Commented:
I am using direct attached storage via sas. I did try setting up a disk using raw device mapping, but it was greyed out. Is there a advantage or disadvantage in using raw mapping as opposed to spanning?
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
You can only use RDM with SAN presented LUNs, using RDM would be the preferred method of using large disks.

Spanning is messy and just a workaround, some people do it, but remember if you lose a virtual disk, you will lose access to the entire 7tb volume.

Author

Commented:
RDM seems the way to go, just trying to figure out why the option is greyed out in vsphear, vmware KB seems to be down.
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
Do you have a SAN?
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017
Commented:
you need to present a LUN (volume) from an iSCSI or Fibre Channel SAN, to create a RDM

Author

Commented:
I am using attached storage via SAS. so now I can assume this would be the reason?
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
Correct, no SAN, no RDM

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