To 9.0 yes. To go to 9.1RC2 go to 9.0 first (as mentioned on the 9.1RC2 cautions page). If you go to 9.1RC2 you will also need to change a setting in the vloader:
setenv console vidconsole,comconsole
The cluster upgrade method will not work because that method expects HA pairs, but the traditional rolling upgrade method will work with some care given to epsilon and juggling of svm root volumes. Also ensure you have sufficient space on the node root volumes to download the image.
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I started with vsim 8.3.1, then updated to 9.0RC1 and then to 9.1RC1. No I wanted to use 9.1 GA but the update leads to a boot loop. This is what is shown on the console as the last screen before reboot
Any Ideas on this?
I can still boot 9.1RC1 with boot_backup so the vsim is not broken. Tried this two times with the same result...