Hello,  What's important is the OS connecting to the volume.  Are you running ESXi v5 and VMFS v5 filesystem?   Older versions of ESX and VMFS v3 have a 2047GB limit.   However, rather than keep extending one volume, I would suggest creating a new volume.  Mulitple volumes yield better performance.   Each volume has a negotiated limit on the number of outstanding IOs that can be processed.  More volumes mean more outstanding IOs can be processed.  Also, all the VMs on a single volume run up against that limit.   Also, at times an ESX node will need to exclusively reserve a volume.  During that time only that node can access the volume.  With more volumes, IO would continue to be handled on non reserved volumes.   Here are some quick best practices for ESX and EQL as well.  Disabling Delayed ACK,  Large Recieve Offload, making sure VMs with multiple VMDKs/RDMs are not sharing a single Virtual SCSI controller.  Each VM can have up to four SCSI controllers.   Solution Title HOWTO: Disable Large Receive Offload (LRO) in ESX v4/v5  Solution Details Within VMware, the following command will query the current LRO value.  # esxcfg-advcfg -g /Net/TcpipDefLROEnabled  To set the LRO value to zero (disabled):  # esxcfg-advcfg -s 0 /Net/TcpipDefLROEnabled  NOTE: a server reboot is required.  Here's how to disable Delayed ACK  kb.vmware.com/.../search.do Some links on adding Virtual SCSI controllers  kb.vmware.com/.../search.do kb.vmware.com/.../search.do Regards,   Don 
I have volume on our EqualLogic PS4000 that holds about 20 vmdk's for ESXi enviornment.  I want to increase the capacity of this volume to 2.5tb to support future growth. When I do this in the Group Management Console I get a warning that says some OS's don't support volumes larger than 2tb.  The volume holds a mix of Ubuntu and Windows Servers, and none of the HDDs are over 100gb individually, and they are all vmdks that are just housed on the volume. When I increase the size of the volume it shouldn't affect the servers ability to see the volume, right?  That would only apply if I was going to put a file system directly on the volume (and it was larger than 2tb)?  Thanks in advance.
Volumes larger than 2tb