HMC updates managed system firmware on both T and P sides ?

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HMC updates managed system firmware on both T and P sides ?

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Operating Systems AIX HMC updates managed system firmware on both T and P sides ?

09-19-2011

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HMC updates managed system firmware on both T and P sides ?

Hi,

I'm planning to update managed system firmware to new release using HMC.
This is cite from IBM documentation describing HMC managed system updates:

Quote:

If any actions are listed at the bottom of the confirmation panel, complete them, and then click OK to confirm that the upgrade should begin. A progress panel displays the results as the upgrade proceeds. At the end of the process, the new release level of LIC will be installed on both the t-side (temporary side) and the p-side (permanent side).

What I know we install new firmware to T side and in case some problems we boot P side and reject new fw on T.
So if HMC updates both T and P at the same time - the question is why ?

thanks
Vilius

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firmwarepasswd

FIRMWAREPASSWD(8)					    BSD System Manager's Manual 					 FIRMWAREPASSWD(8)

NAME

     firmwarepasswd -- tool for setting and removing firmware passwords on a system

SYNOPSIS

     firmwarepasswd [-setpasswd] [-setmode mode] [-mode] [-check] [-delete] [-verify] [-unlockseed] [-h]

DESCRIPTION

     The firmwarepasswd command is used to add or remove firmware passwords from a system as well as check status and other options.  The
     firmwarepasswd command requires root privileges to run.

     A list of flags and their descriptions:

     -setpasswd
	     Prompts to add a new firmware password or change and existing password if one exists.

     -setmode mode
	     Set the mode to "command" or "full".  "Command" will prompt for the firmware password if the user attempts to boot from a different
	     volume.  "Full" will prompt on every startup (not recommended).

     -mode   Displays the current mode if one is set.

     -check  Displays whether or not a firmware password is set.

     -delete
	     Prompts for password and clears both password and the mode if correct.

     -verify
	     Prompts for password and displays success if correct.

     -unlockseed
	     Generates a firmware password recovery key.  Note: Machine must be stable for this command to generate a valid seed.  No pending
	     changes that need a restart.  NOTE: Seed is only valid until the next time a firmware password command runs.

     -h      Displays a list of all the commands available in the firmwarepasswd tool, with explanatory information.

FILES

     /usr/sbin/firmwarepasswd

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								   April 9, 2014							      OS X