"ad2: TIMEOUT - READ_DMA retrying (2 retries left) LBA=23444158" with BETA6

Hi,

this is kind of a "me too"-posting for the similar issue (with BETA5) reported 
last week on this list.

On my Acer Aspire 1705SCi "laptop" (P4 processor with Hyperthreading enabled) 
I tried booting BETA6 from the disc2 CD-ROM today, which seems to work fine 
except that the error message 
"ad2: TIMEOUT - READ_DMA retrying (2 retries left) LBA=234441585"
is printed once on boot-up (and just on boot-up so far).
It doesn't matter if I boot with ACPI enabled or disabled.
The reported LBA is always the same (the harddisk's SMART data looks fine, 
however).

Nevertheless, I can read from the hard disk and mount file systems on it 
without apparent problems (and without the message getting printed again).

FreeBSD 5.2.1 (currently installed on that computer) doesn't have this 
problem.

I've attached the dmesg of BETA6.

Jonas Wolz