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1 CCR commented Permalink

Hi <div>&nbsp;</div> I wondered about this <div>&nbsp;</div> "Before the AIX OS is upgraded, SDDPCM must be uninstalled and then reinstalled after the upgrade" <div>&nbsp;</div> Is that only if you are using SAN boot devices. If I boot off local disk does this advice still apply? The SDD user guide seems to suggest that if you boot from local disk you can just upgrade the software without removing the devices etc. <div>&nbsp;</div> Thanks

2 anthonyv commented Permalink

You really need to do this in both cases. <br /> Boot from SAN is the more important case, but either way, if you dont reinstall prior to upgrade you may have issues with filesets that refuse to let go.

3 AnthonyEnglish commented Permalink

This was a very helpful post, Anthony. <div>&nbsp;</div> There is also an article on developerWorks which is a guide to selecting a multipathing path control module for AIX or VIOS. It describes the relevant features of both SDDPCM and the default AIX MPIOPCM. <div>&nbsp;</div> You can find the article at

4 anthonyv commented Permalink

Thanks for posting the link, that article is very useful indeed!

5 AnthonyEnglish commented Permalink

I noticed there is now a procedure available for upgrading SDD or Migrating SDD to SDDPCM on a Virtual I/O Server on AIX Platform. <br />;aid=1 <div>&nbsp;</div> There's another document about migration procedures when going from VIOS 1.X to version 2.X. <br />;aid=1 <div>&nbsp;</div> To check your VIOS level, log in as padmin (the restricted shell) and run ioslevel ( <div>&nbsp;</div> I keep coming back to two posts of yours, Anthony: this one on SDDPCM and the one on Fibre Channel adapter attributes ( Even though it's for XIV, I use it can be applied in other FC situations.