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ata_udma5
2013 Feb 01
1
stable/9: Force ada1 to UDMA-33
Hello,
I've got a (P)ATA disk in a special frame. The disk itself
supports UDMA-100 (and has an 80-ribbon cable), but the
frame isn't compatible with that. By default, FreeBSD
negotiates UDMA-100, and the console starts to fill with
ICRC errors.
In the past, I used a patch to ata-all.c that enabled the
following entry in loader.conf to force the disk to UDMA-33,
so it worked fine: