Upgrade 8.1 VSA to 8.5?

[Gregory J. Boehnlein]

Hello,
I have a pair of 8.1 VSA's that I run in my lab for testing purposes, and I tried to update them to 8.5. However, the update process failed and complained about the "Base OS Disk" not having enough free space to continue with the upgrade. Is there a specific document on how this can be done w/out bothering Tech support? Or should I re-install one node at a time, and migrate the volumes over to it?

[Uwe Zessin]

HP StorageWorks P4000 Series SAN Solution Upgrade Instructions
AX696-96010__20100402

http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c02073063/c02073063.pdf

See "Increase the size of the OS disk on both VSAs and Failover Managers" on page 11.