Volumes over 2 TB

I have the volume on our EqualLogic PS4000 that holds about 20 vmdk for ESXi enviornment.  I want to increase the capacity of this volume of 2.5 to support future growth.

When I do this in the Group Management Console, I get a warning that says that some operating systems do not support volumes over 2 TB.  The volume contains a combination of Ubuntu and Windows servers and none of the drives are more than 100 GB individually, and they all VMDK located just on the volume.

When I increase the size of the volume, it should not affect the ability of servers to see the volume at right?  Which applies only when I was going to put a system of files directly on the volume (and it is longer than 2 TB)?

Thanks in advance.

Hello

What is important is the operating system that is connecting to the volume.  You run ESXi v5 and v5 VMFS file system?   Older versions of ESX and VMFS v3 have a 2 047 GB limit.

However, rather than keep the extension of a volume, I would suggest creating a new volume.

Mulitple volumes give better performance.   Each volume has a limit negotiated on the number of IOs in circulation that can be treated.  More medium-sized volumes most outstanding IOs can be processed.  In addition, all the virtual machines on a single volume to run into this limit.   In addition, sometimes a node ESX must exclusively a reserve volume.  Meanwhile, only that node can access the volume.  With more volume, IO would continue to be managed on a non-reserved volumes.

Here are a few quick recommended practices for ESX and EQL as well.

Disabling delayed ACK, large receive offload, ensuring you that virtual machines with multiple VMDK/RDM do not share a single virtual SCSI controller.  Each virtual machine can have up to four SCSI controllers.

Solution title HOWTO: disable large receive unloading (LRO) in ESX v4/v5

Details of the solution in VMware, the following command queries the current value of LRO.

# esxcfg - advcfg - g/Net/TcpipDefLROEnabled

To set to zero (disabled) LRO value:

# esxcfg - advcfg - s 0/Net/TcpipDefLROEnabled

NOTE: a server restart is required.

Here's how to disable delayed ACK

KB.VMware.com/.../Search.do

Some links on virtual SCSI controllers adding

KB.VMware.com/.../Search.do

KB.VMware.com/.../Search.do

Kind regards

Don

Tags: Dell Products

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