I decided to name this post as “Take Care” as I found myself looking for promissed VSphere features that will not be avaiable in most Corporate environments therefore you should prepare yourself, and your environment.
While I as upgrading my VM’s from 3.x to VSphere I based my work on this great step-by-step article from @scot_lowe Scott Lowe’s (see link bellow). The main reason for upgrading was related to the ability to run the new VMXNET3, Paravirtualized SCSI and Hot-Add/Hot-Plug. I also wanted to customize my templates to use hardware v7.
After upgrading the first few VM’s I noticed the following caveats:
- Hot-add/Hot-plug is not compatible with VMware Fault Tolerance
- VMXNET3 and PVSCSI are not compatible with VMware Fault Tolerance
- Linux supports Hot-add but not Hot-plug
- For Hot-add/Hot-plug Windows 2003 Standard isn’t supported, only Enterprise and Datacenter Editions
- VMware doesn’t support booting from a PVSCSI device (See comments on Scott Lowe’s Blog)
In my tests I have also been able to verify that VMware Fault Tolerance does not require hardware v7 to work as I have seen in other blog posts and comments.
In general lines, if you are keen to have Hot-Add/Hot-Plug in your environment you should consider upgrading your Windows versions ($$$) and reviewing FT requirements on your VM’s.
I take that if FT is enabled it is because there is a need for a higher SLA therefore Administrators should be able to Hot-Add/Hot-Plug on-demand Especially in these environments. VMware, you let me down on this one.
Have Fun and Break a Leg