vSphere ESXi 6 upgrade with Qlogic(Brocade) BR-1020

When upgrade ESXi 6 with Qlogic (Brocade) BR-1020, you have several method.
1. Upgrade by "update manager", after upgrade re-install Qlogic BR-1020 driver (bna/bfa) manually.
2. Upgrade by CD/DVD, you need to update BR-1020 driver to ESXi5.5/6
3. Make new ESXi 6 CD/DVD with BR-1020 driver then do upgrade.

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