FreeBSD 5.4-STABLE: DVD in PIO mode?

O. Hartmann ohartman at
Wed Apr 6 09:00:59 PDT 2005

After I did a cvsupdate today and recompiled world/kernel, I realized
that DVD/CDROM now is by default in PIO mode 4. I have to bring them
back to DMA explicitely by setting hw.ata.atapi_dma="1" in

Is this right or is this a weird behaviour of the widely unsupported
(and therefore running in some GENERIC modes) ASUS A8N-SLI (nForce4
based Socket939 mainboard)?

Looking at dmesg output, the harddisk attached to the nForce4 SATA II
controler is said to be driven in UDMA33 mode by a GENERIC-ATA driver
for this still unsupported chipset. Can I trust this message or is it
simply a dummy message and the harddisk is driven as SATA150 (Maxtor
6B200MO, 200GB, NCQ capable)?


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