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тАО05-02-2005 05:16 PM
тАО05-02-2005 05:16 PM
Difference between HP PA-RISC and IPF Itanium
Hello !
I was searching for documentation on difference in HP PA-RISC and IPF architectures.
Since HP 11i V2 supports both of them, I wanted some detailed information on difference between these two architectures.
Can anyone of you please guide me to websites where I can find such documents.
I din't find a specific one on HP site.
Thanks n Regards,
Sagar Shinde
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тАО05-02-2005 05:46 PM
тАО05-02-2005 05:46 PM
Re: Difference between HP PA-RISC and IPF Itanium
http://search.hp.com/redirect.html?url=http%3A//h71028.www7.hp.com/enterprise/cache/80518-0-0-225-121.aspx&qt=Itanium+versus+PA-RISC&type=HPR&pos=1&key=itanium&alias=itanium
http://search.hp.com/redirect.html?url=http%3A//h71028.www7.hp.com/enterprise/cache/81293-0-0-225-121.aspx&qt=Itanium+versus+PA-RISC&type=HPR&pos=2&key=itanium&alias=itanium
Java differences on the two architectures
http://search.hp.com/redirect.html?type=REG&qt=Itanium+versus+PA-RISC&url=http%3A//www.hp.com/products1/unix/java/java2/sdkrte14/infolibrary/sdk_rnotes_1.4.1.03.html&pos=6
One thing I know is that Ignite's make_tape_recovery function was not fully functional on the Itanium platform, though there are varying reports on that.
The current release of HP-UX v2 will install on either architecture, but the code base is different. HP-UX v3 is supposed to be unified code base, one code base running on both system types.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО05-02-2005 06:48 PM
тАО05-02-2005 06:48 PM
Re: Difference between HP PA-RISC and IPF Itanium
HP concluded that PA-RISC would become too expensive to continue to build, as it ramped up in power and transistor counts, and down in microstructure and gate sizes. Each new milestone meant a whole new fab for the processing, and a chip fab is an increasingly expensive thing to build. So, let somebody who builds chips for a living (and has to build newer better fabs anyway) build the follow-on chips. Plus, Intel needed a more powerful processor to get it to the 64-bit market, or so it thought at the time (now with AMD leading the charge on the low end, everybody's doing it).
It took way too long, but Itanium is finally achieving its potential. HP's Itanium based servers are leading most of the benchmarks involving Floating Point and transactional processing these days. The current PA-RISC versions are way behind Itanium in these admittedly imperfect power ratings. Here are some interesting web sites:
http://h21007.www2.hp.com/dspp/files/unprotected/itanium_momentum.ppt
On this next one, the part you are looking for starts about half-way through it. A relatively concise history of the two processors, the similarities and differences, and the reasons for the change.
http://h71028.www7.hp.com/ERC/downloads/5981-7115EN.pdf
Hope this is of some use. --bmr
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тАО05-03-2005 06:34 AM
тАО05-03-2005 06:34 AM
Re: Difference between HP PA-RISC and IPF Itanium
There is quite a difference between PA-RISC & Itanium2 when it comes to booting.
This is because the the IA systems use teh EFI (Extensible Firmware Interface) as opposed to the PA ISL (Initial System Loader).
The EFI requires a FAT-32 filesystem instead of the PA's HFS filesystem. And as SEP alluded to - this is *why* one cannot boot a recovery tape on an Itanium system. You have to boot the Install DVD first & then extract the contents of the recovery tape. That and the fact that an IA boot disk is sliced as well - i.e. /dev/cWtXdYsZ - are *the* main differences. The above make the root/boot mirror procedure *much* different. Not necessarily harder - just radically different.
My $0.02,
Jeff
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тАО05-03-2005 07:43 AM
тАО05-03-2005 07:43 AM
Re: Difference between HP PA-RISC and IPF Itanium
http://h71028.www7.hp.com/enterprise/cache/80518-0-0-0-121.aspx