pdc message on boot ?

[ballans]

Hello everybody,
when I boot my new server (HP-UX 11iv1), just after the HARD boot, I have a message about the function alloc_pdc_pages...

ISL Revision A.00.43 Apr 12, 2000

ISL booting hpux

Boot
: disk(0/4/1/0/4/0.0.0.0.0.0.0;0)/stand/vmunix
11182080 + 2289664 + 2655976 start 0x1fed68

alloc_pdc_pages: Relocating PDC from 0xfffffff0f0c00000 to 0x3f900000.
gate64: sysvec_vaddr = 0xc0002000 for 2 pages
NOTICE: autofs_link(): File system was registered at index 3.
NOTICE: cachefs_link(): File system was registered at index 4.
NOTICE: nfs3_link(): File system was registered at index 5.
CISS: RAID SA controller on hardware path 0/4/1/0/4/0 is now online.
igelan0: INITIALIZING HP PCI 1000Base-T Core at hardware path 0/1/2/0

So, I have two questions :
- For HP-UX, what is exactly PDC ?
- Is the message concerning alloc_pdc_pages normal ?

Thank you for your replies.
Herve

[Peter Godron · Accepted solution]

Hi,
The message signals that PDC the is being copied from NVRAM to RAM and yes the message is normal.

man pdc gives more information

[Christian Tremblay]

PDC means: Processor dependant code

[Ninad_1]

Yes the message perfectly normal.
PDC is the firmware for your server (processor dependant code)
Find out more information on booting sequence in the manual at
http://www.docs.hp.com/en/B2355-90950/ch05s01.html?btnNext=next%A0%BB

Regards,
Ninad

[OldSchool]

Also "man pdc" for more info......

[Torsten.]

Hello Herve,

the PDC is the processor dependend code - the firmware of a PA-RISC server (like the EFI shell for an Integrity server or the BIOS for a PC). Like the BIOS it gives the machine basic IO capabilities (and some other features).

Parts of this code are needed while the system is running, therefore the code will be copied from the slow ROM (in this case NVRAM) to the fast RAM while the secondary system loader (a binary named hpux) is loading the kernel.

[ballans]

Thanks for all the explanations...