ATA error on 6.0-BETA4

Patrick Bowen pbowen at
Wed Sep 14 18:41:33 PDT 2005

Søren Schmidt wrote:

> On 07/09/2005, at 1:04, Wesley Gentine wrote:
>> Dear Colleagues,
>>         After I updated my system from 5.4-RELEASE to 6-BETA2 my cdrom
>> device
>> isnt recognized and I received the following message in the end of
>> dmesg:
>> Timecounter "TSC" frequency 2000081623 Hz quality 800
>> Timecounters tick every 1.000 msec
>> ad0: 38172MB <MAXTOR 6L040J2 A93.0500> at ata0-master UDMA133
>> unknown: timeout waiting for read DRQTrying to mount root from
>> ufs:/dev/ad0s1a
>> my controller is:
>> atapci0: <VIA 8235 UDMA133 controller> port
>> 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xa800-0xa80f at device 17.1 on  
>> pci0
>> ata0: <ATA channel 0> on atapci0
>> ata1: <ATA channel 1> on atapci0
>> What´s happening?
> You tell me with a dmesg from a verbose bootet system, and what CDROM  
> drive you have and where it is connected :)
> Then I'll look into it...
> Søren Schmidt
> sos at
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I've notice the same behaviour on my Dell C600. I've attached verbose 
dmesg's for -current and 5.4. When I boot 5.4 the CD-RW is found and I 
have no problems using it for either reading or writing. I hope they're 
useful for you.

I'd like to say that I have the greatest respect for *all* of you that 
work at making FreeBSD the great OS that it is. I just wonder where you 
find the time to work on it, what with your day jobs, family 
responsibilities and all...

Patrick Bowen

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