New production server PLUS upgrade!

After years of groveling, weekly church visits, and burning incense, it appears that I will finally be able to get a new production server for our 3.3 TB data warehouse. They are also going to add 2 TB of space to our main storage array.
In addition, management wants to upgrade from 10.2.0.3 to 11gR2 as part of that migration. Our current server was not able to handle 11g, according to Oracle.
In recent times, I have had to do some very non-standard things as a dba, mostly due to insufficient resources. So these migrations may not be as straightforward as what you read in the docs, and therefore I would like some opinions about how best to achieve the migration to the new box, and to 11gR2.
Our current environment is a Sunfire 6800 Sparc 64 box with 12 900mhz cpus and 16G of ram, and Solaris 10.
Most of our datafiles are housed on a 3.7 TB Sun 2540 storage array, but due to space and performance constraints, it was decided to put one very large and mostly unimportant tablespace (350G) on a 2.1 TB Sun 3511 array. We also put our 2 temporary tablespaces (about 54G) on that array. Also on the 3511 array is our db_recovery_file_dest area, with all of our archived redo logs and flashback logs. Due to lack of space there, I have to direct our RMAN database file backups, archived log backups, and exports to an unsupported Hitachi SAN, which is 8 years old, like our Sunfire 6800.
The new server is a Sun M4000 with Solaris 10, so the OS will not be an issue. It will have 4 4-way 2.5ghz processors and 32G of ram. The newly expanded 2540 array will have enough space to hold us for a few years. It is currently 3.7TB, using 2.6 of that. When expanded, it will be about 5.8TB.
My mission is to move all of the temporary tablespace and other data files (about 1 TB) and the exports (1 TB) to the newly expanded 2540. We will keep the space (2.1 TB) allocated on the 3511 attached to the new server, but it will be used ONLY for recovery-related files; rman backups, flashback logs, archived logs, etc. My goal is to keep at least two full rman backups in that space, along with all the necessary archived log backups. We are supposed to get everything off of the old SAN. So, there will be a lot of file shuffling, nothing new for this shop.
My plan would be to install 10.2.0.3 (same exact version) on the new server, then hook it up to the existing storage arrays. (My boss thinks that will reformat all of the disks on those arrays, but I don't think that is necessarily true. I believe it is possilble to mount each file system on those arrays to the new box, so long as they have been unmounted from the old one. Then again, I am not a Unix Admin)
Next, I would startup-mount the database, move the necessary files to the 2540 using Oracle and Unix commands, then shut down the db. Then, I would install 11gR2 with all patches on the new server, and upgrade the database manually, in place.
If my boss is right and connecting the new server to the existing arrays means re-initializing them, he asked if we could use our last RMAN backup to restore the database in the new environment. I said if we were still running 10g at that time on the new server, and all the file systems were identical, that should be possible. However, I should note that we do NOT use an RMAN catalog (RMAN uses the controlfile). We have no place to put an RMAN catalog. I have never even had a place to test doing a restore with RMAN.
If anyone out there has been through a migration to a new server along with an Oracle upgrade, I would appreciate any ideas on the best way to go about it.

Hi,
Its not recommended to upgrade OS and Database same time. I would recommend :
1) Migrate database from Old Server to new Severs.
-> Install OS, packages, patches, create users, groups, mount points and configure kernel parameters as required.
-> Restore $ORACLE_HOME, inventories, mount all data partitions on same mount points similar to old servers
-> Perform relink for all oracle home binaries using command relink all command.
Refer tech notes:
http://download.oracle.com/docs/cd/B19306_01/install.102/b28053/toc.htm
*Is It Necessary To Relink Oracle Following OS Upgrade? [ID 444595.1]*
*How to Relink Oracle Database Software on UNIX [ID 131321.1]*
2) Then perform an upgrade for your database.
http://download.oracle.com/docs/cd/E11882_01/install.112/e10863/toc.htm#i1011296
http://download.oracle.com/docs/cd/E11882_01/server.112/e10819/toc.htm
Hope helps :)
Regards,
X A H E E R

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