FAILURE - WRITE_DMA timed out

"Jo Bailey" <[email protected]>
Newsgroups gmane.os.freebsd.newbies
Message-ID <[email protected]>
I'm getting the following timeout messages, I've copied the interesting 
dmesg output below. Has anyone got any suggestions on what is causing this 
or point me in the right direction?

The hardware is a standard Acer Altos R310.

acpi_cpu: throttling enabled, 8 steps (100% to 12.5%), currently 100.0%
acd0: CDROM <SR244W1/T01A> at ata0-master UDMA33
ad2: 76319MB <ST380013AS/3.05> [155061/16/63] at ata1-master SATA150
Mounting root from ufs:/dev/ad2s1a
em0: Link is up 100 Mbps Full Duplex
ad2: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=9611455
ad2: FAILURE - WRITE_DMA timed out
ad2: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=9627231
ad2: FAILURE - WRITE_DMA timed out
ad2: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=5095231
ad2: FAILURE - WRITE_DMA timed out
ad2: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=9611455
ad2: FAILURE - WRITE_DMA timed out
ad2: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=5095231
ad2: FAILURE - WRITE_DMA timed out
ad2: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=9625791
ad2: FAILURE - WRITE_DMA timed out
ad2: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=9611267
ad2: FAILURE - WRITE_DMA timed out
ad2: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=9611455
ad2: FAILURE - WRITE_DMA timed out
ad2: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=9627327
ad2: FAILURE - WRITE_DMA timed out

Thank you in advance for any help.
Jo

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