B2600 workstation & HP-UX 11.0 32bit

[Richard Sun]

In the document supplied from HP, it is said that the B2600 workstation only support HP-UX 11.0 64Bit. Can I downgrade to 32 bit for this system? Thanks for advance

[Bill Hassell]

Hummm, the HP website says that the B2600 is supported on 10.20 (which is 32bit only) so it may be installed with 11.0 and choose either 32bit or 64bit opsystem. NOTE: you'll need the Core HP-UX installation CDs Jan 2000 or later. Older CDs do not have some of the components needed to support the B2600. See http://www.hp.com/workstations/risc/standard/bclass/specs.html

[Rajesh G. Ghone]

Hi,
i have seen B2600 working with 10.20 installed this means that B2600 works with 32 bit OS also.
I think there shouldnt be a problem going for 11.00 32bit,but please make sure that you are using latest OS & Support Plus media.

Regards,
Rajesh G.

[rick jones]

Anything running a PA-8500 or later CPU will only be supported on the 64-bit flavor when running HP-UX 11.X. Even if that same system runs and is supported on the 10.20 OS.

The only systems for which one is given a choice of either 32 or 64-bit 11.x are those systems running with PA-8[02]00 CPUs.

The B2600 uses (iirc) a PA-8600 CPU.

A 64-bit kernel can run both 32-bit and 64-bit applications. Unless you have something very kernel intrusive (such as a driver) there really should be no problems running the 64-bit kernel.

[Ross Zubritski]

32 bit will work just fine.

Regards,

RZ

[Richard Sun]

Yest, the reason to change from 64 bit to 32 bit is we are developing a driver for a PCI digital I/O card. The system crash in HPMC: "A Data I/O Fetch Timeout occurred while CPU 0 was
requesting information from a device at the path 10/1/1/0 (PCI slot 1)". After check hardware supply, it is said the hardware only work in 32 bit os.

[rick jones]

i'm sure someone will point-out a corner case, but why on earth would the card hardware give a rodents backside about the bitness of the OS...

now, I could see where the card might only support 32-bit addressing on the PCI bus, but the cobination of I/O adaptors and I/O services code (you are using the mapping calls right?) should hide all of the 64-bitness in the OS from the card.

i could also see where a driver may have only been "certified" under a 32-bit compile and lurking bugs in 64-bit mode could cause problems.