Maintenance Mode is not moving VMs off ESX host, so failing

[emmar]

We have an ESX 3.5 and VC 2.5 install.

VMotion is functioning fine and when DRS is set to Auto the VMs are migrated off when put into Maintenance mode.

But when we set the DRS to partial or manual or disabled, maintenance mode is not attempting to vmotion off the VMs and is stuck at 2% until will cancel or manually vmotion the VMs off.

We even get a message along the lines of. "there are virtual machines on this host, it will not be put into maintenance mode until they are migrated off or shut down"

So because of this things like UM are not working for us at the moment as it cant migrate the VMs off.

Can anyone think of any reasons!

Thanks,

E

[abaum]

The fix is VC U3. I haven't moved to ESX U3, only to VC U3 and no longer have the problem. The release notes make mention of it.

adm

[P2Ver]

Thank you for helping!

In Vsphere 4.1 with Vcenter 4.1 this tiny check box is indeed the solution:

Check 'Disable: Power on VMs that violate availability contraints' under HA Admission control in cluster settings.

It works great! Tho it is strange since my vm's dont violate the availability constraints...

Any ideas anyone?