Okay. who broke ata.

make world from yesterday broke support for my promise udma66 controller,
getting READ/WRITE errors on the drive attached to, reverting to previous
kernel fixes problem.

Apr  4 15:38:40 hades kernel: atapci0: <Promise PDC20262 UDMA66
controller> port
 0xd400-0xd43f,0xd000-0xd003,0xcc00-0xcc07,0xc800-0xc803,0xc400-0xc407 mem
0xef0
00000-0xef01ffff irq 5 at device 10.0 on pci0
Apr  4 15:38:40 hades kernel: ata2: at 0xc400 on atapci0
Apr  4 15:38:40 hades kernel: ata3: at 0xcc00 on atapci0

<snip ...>

Apr  4 15:38:41 hades kernel: ad4: DMA limited to UDMA33, non-ATA66 cable
or dev
ice
Apr  4 15:38:41 hades kernel: ad4: READ command timeout tag=0 serv=0 -
resetting
Apr  4 15:38:41 hades kernel: ata2: resetting devices ..
Apr  4 15:38:41 hades kernel: ata2-slave: ATA identify retries exceeded
Apr  4 15:38:41 hades kernel: done
Apr  4 15:38:41 hades kernel: ad4: 29333MB <WDC WD307AA-00BAA0>
[59598/16/63] at
 ata2-master UDMA33
Apr  4 15:38:41 hades kernel: acd0: CDROM <ATAPI CD-ROM 52XMax> at
ata0-slave PI
O4
Apr  4 15:38:41 hades kernel: ad4: READ command timeout tag=0 serv=0 -
resetting
Apr  4 15:38:41 hades kernel: ata2: resetting devices ..
Apr  4 15:38:41 hades kernel: ata2-slave: ATA identify retries exceeded
Apr  4 15:38:41 hades kernel: done

and so on.