RE: HMC 4.4 (and above)3

From:  Andy McLaughlin of IBM Austin TX.

        I believe what is being referred to here is that in the 4.3 release
of the HMC, an enhancement was made to support a Journaled File System
(EXT3), which provides much better file system recovery in the event of a
power loss or crash of the HMC.    However, the file system on the HMC only
gets converted to EXT3  if you do a full release install (which requires
the CDs).   You can also just install 4.3 as a PTF to an existing HMC at an
earlier release level, but that will only update the code without
converting the filesystem.  I believe this improved reliability is why the
Tech Support team is recommending that you do the full install update.
There is no such underlying change going from 4.3 to 4.4, which is why just
applying the PTF is sufficient.   I'm sorry that the reasons were not
better explained to you.
        You can see this information in the release notes for 4.3 on the
HMC support web site at:
https://techsupport.services.ibm.com/server/hmc/power5/fixes/ptf_v4r31.html

Thanks,
Andy
STSM, eServer System Architecture
IBM Systems Group
Bldg 045/2M122, Austin, TX                Inet: amclaugh@xxxxxxxxxx


Jim Oberholtzer
Senior Solutions Architect
Computech Resources, Inc.