ATA_DMA errors

[twesky]

I am having ATA_DMA errors on 5.4R and 5 STABLE up to June 16 (haven't
done a cvsup again).  It doesn't happen on 5.3R or lower.

The exact error message is below:

It happens within a few hours of use.  The laptop will then reboot,
and fsck must be ran.  After fsck the timeouts happen within a few
seconds of booting.  Is this a known issue?

ERROR MSG
-------
ad0: timeout - READ_DMA retrying (2 retries left) LBA=24531835
ad0: warning - removed from configuration
ata0-master: failure - READ_DMA timed out
-------

The laptop is a SONY VAIO PCG-Z1WA

dmesg info
ad0: 57231MB <TOSHIBA MK6021GAS/GA024A> [116280/16/63] at ata0-master UDMA100

fdisk info
# fdisk
******* Working on device /dev/ad0 *******
parameters extracted from in-core disklabel are:
cylinders=116280 heads=16 sectors/track=63 (1008 blks/cyl)

Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=116280 heads=16 sectors/track=63 (1008 blks/cyl)

Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 63, size 117210177 (57231 Meg), flag 80 (active)
        beg: cyl 0/ head 1/ sector 1;
        end: cyl 1023/ head 254/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>