How to know which stages are needed to safely update old Procurve firmware?

[hpbon]

I understand that bootROM follows certain firmwares.

I have for instance a ProCurve 2910al-24G firmware W.14.38, ROM W.14.04

Latest firmware for this is apparently W.15.14.0012 - can I simply just put it on top (cumulated), or do I need to follow everyone listed on https://h10145.www1.hpe.com/downloads/SoftwareReleases.aspx?ProductNumber=J9145A

Or this ProCurve Switch 2650 (J4899B) - it is running H.10.67, ROM H.08.02 and latest firmware according to https://h10145.www1.hpe.com/downloads/SoftwareReleases.aspx?ProductNumber=J4899B is H.10.117

Actually I have several old swithes that I want to update - how to figure out the safe path - is it just to download latest firmware, put it on a TFTP, flash it and hope for the best?

Regards, Lars.

[Richard Brodie_1]

Lars,

You do not have to have to go through every intermediate firmware revision, or even every revision that updates the Boot ROM. There should be a warning in the release notes in the upgrading section, and as a README in the ZIP file,  and on the download page. The prior versions will also be available.

For comparison, here is a switch with required firmware updates:

on https://h10145.www1.hpe.com/downloads/SoftwareReleases.aspx?ProductNumber=J8992A

Having said that, it isn't quite so clear for the 2650, but they do provide H.08.98 on the download page for a reason.