Re: kern/57362 (piixide / wd does not fall back to PIO4 after excessive DMA errors)

[riastradh%NetBSD.org@localhost]

Synopsis: piixide / wd does not fall back to PIO4 after excessive DMA errors

Responsible-Changed-From-To: kern-bug-people->jdolecek
Responsible-Changed-By: riastradh%NetBSD.org@localhost
Responsible-Changed-When: Mon, 17 Jul 2023 13:54:44 +0000
Responsible-Changed-Why:
The downgrade mode logic was disabled by default in ata.c 1.159:
http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/dev/ata/ata.c?rev=1.159&content-type=text/x-cvsweb-markup&only_with_tag=MAIN
You can probably re-enable it by adding

options 	ATA_DOWNGRADE_MODE

to your kernel and recompiling (may need to delete ata.o first, looks
like this was done withouta header file update).

jdolecek: Can this be made into something that can be configured
dynamically, so if you have a disk that is affected, it doesn't
require recompiling the kernel?


State-Changed-From-To: open->analyzed
State-Changed-By: riastradh%NetBSD.org@localhost
State-Changed-When: Mon, 17 Jul 2023 13:54:44 +0000
State-Changed-Why: