I run into hard system hangs with my promise controller (kernel:
2.4.19-pre4-ac3)
Background:
* Harddisk with bad sectors.
* reading from one of the bad sectors usually causes error messages, but
sooner or later the kernel falls back from UDMA to pio.
* obviously pio doesn't work either, and ide_error is called.
* the fallback works if the harddisk is connected to a via VT82C686
south bridge.
* the fallback causes a total system hang if the drive is connected to
the promise controller.
* it hangs on the "rep;insw;" instruction in ata_input_data(), called by
try_to_flush_leftover_data().
Before someone replies that I should not try to read bad sectors: The
harddisk was used in a headless server, and I did not expect that sector
errors cause system crashes. And the crash defeats the purpose of
software raid1.
Any idea where I should continue to search? It seems that the pdc20269
controller doesn't handle the error fallback to pio. If I boot with
"ide=nodma", then pio works.
I've attached lspci and dmesg. If you have further questions, please
ask. I have a test setup with kdb.
--
Manfred
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This archive was generated by hypermail 2b29 : Sun Mar 31 2002 - 22:00:19 EST