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Full Discussion: kernel panic on RHEL3
Operating Systems Linux kernel panic on RHEL3 Post 302129426 by Perderabo on Monday 30th of July 2007 10:17:30 PM
Old 07-30-2007
Maria, I can give you my guess as to what is going on. But bear in mind that it is only a guess. An ATA drive can transfer data 2 different ways: PIO (programmed io) and DMA (direct memory access). PIO is slow but even the first ATA drives support it. DMA is fast but it comes in different speeds. There are various rules for what is the higher speed supported. For example 66 MB/s requires an 80 pin connector. In your case, it seems like a speed that used to work no longer does. To me, this implies hardware damage. PIO is used during bootup and I would kinda expect the OS to run very very slowly without DMA working. (But I am not completely sure of this.) So I also suspect additional hardware damage beyond what is being reported.

What I would do: I always make sure that I have a way to do a fresh OS install on a new box and load my latest backups. (A "bare metal restore" is a typical term.) I would try that now, but I would not be too surprised if it fails. And if it fails, the hardware needs repair.
 

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LEARN ABOUT NETBSD

stpcide

STPCIDE(4)						   BSD Kernel Interfaces Manual 						STPCIDE(4)

NAME

     stpcide -- STMicroelectronics STPC IDE disk controllers driver

SYNOPSIS

     stpcide* at pci? dev ? function ? flags 0x0000

DESCRIPTION

     The stpcide driver supports the STMicroelectronics STPC x86 SoC internal IDE controllers, and provides the interface with the hardware for
     the ata(4) driver.  The driver features DMA mode 2 and PIO mode 4 transfer speeds.

     The 0x0002 flag forces the stpcide driver to disable DMA on chipsets for which DMA would normally be enabled.  This can be used as a debug-
     ging aid, or to work around problems where the IDE controller is wired up to the system incorrectly.

SEE ALSO

     ata(4), atapi(4), intro(4), pci(4), pciide(4), wd(4), wdc(4)

BUGS

     The timings used for the DMA and PIO modes are for STPC Atlas and its siblings with their PCI clock configured at 33 MHz.	Other speeds
     including the STPC Vega Ultra-IDE controller will need adjustments.

BSD
								 October 31, 2003							       BSD
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