How to upgrade esx5.0 to 5.1 on HP Box
Below are the steps to follow
1.Ensure ilo Access and Root access to ESX box.
2.Move all guests in the cluster from this host to other host using vMotion.
3.Make esx host into maintenance mode
4.Connect host via ilo or and mount x.iso as remote media.
5.Reboot the host and allow the firmware process to complete.
6.After completion check that it can connects successfully to vCenter.
7.In vCenter, apply and remediate the “”ESXi 5.1 Upgrade – HP”” baseline from Update Manager, allow server to reboot and upgrade to continue.
1.In case there is an issue with the ESXi upgrade, then rollback by Restart the host and press “”r”” to enter recovery mode.
2.Select the Hypervisor , ESXi 5.0 install, and restore the previous install.