I was also alerted by the excellent VMreference site to the existence of a PowerCLI reference card which is equivalent of the VM reference Card.
VI Internals has a pretty decent introduction to PowerCLI.
Sunday, June 7, 2009
Extending the Disk of a VM
Apparently the only safe way/time to extend the size of a virtual machine's disk(s) is when you do not have a snapshot of the disk.
Through the VIC, you are prevented from increasing the size of a vmdk file. When the VM is running all options are greyed out. Via the command line on the server, you can still enter the vmkfstools -X command.
However, according to VMware support, as soon as you enter that command on a disk that has a snapshot you've completely hosed your VM!
Better have a good backup! Preferably a recent one.
I'm glad to say I didn't discover this first hand. Some colleagues of mine did. I just had to clear up their mess. So it goes!
Well, that's that.
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