Frebsd 7-STABLE, atapicd, atapicam and Intel errors [SOLVED]

Jan Sebosik sebosik at
Wed Nov 19 02:55:36 PST 2008

Allright, I`ve played again with an HPET in BIOS little bit.

Results ->

HPET disabled:

   kern.timecounter.choice: TSC(-100) ACPI-fast(1000) i8254(0) 
   kern.timecounter.hardware: ACPI-fast

HPET enabled:

   kern.timecounter.choice: TSC(-100) HPET(900) ACPI-fast(1000) i8254(0) 
   kern.timecounter.hardware: ACPI-fast

But now FreeBSD boots also with HPET enabled (really don`t understand 
what`s going on).

When I was trying to mount cd with "mount -t cd9660 /dev/cd0 /mnt/cd0", 
mount works as expected (atapicd module not loaded).

Then I`ve kldload-ed atapicd, "mouunt -t cd9660 /dev/acd0 /mnt/cd0" 
(acd0, not cd0), but this ended with messages like this:
unknown: FAILURE - READ_BIG timeout (retry count 0)

Temporary I`ve disabled HPET in BIOS (Linux got problems too-> he 
created gigabytes of log messages in /var/log/messages :D).

Best regards, Jan

Jeremy Chadwick napsal(a):
> On Wed, Nov 19, 2008 at 11:19:37AM +0100, Jan Sebosik wrote:
>> Hi
>> Yeah, I`ve tested it 2 times (switching it in BIOS). To me it seems bit  
>> mysterious, why there is a relationship between HPET setting and acd/cd  
>> problems in FreeBSD.
>> Jeremy Chadwick napsal(a):
>>> On Wed, Nov 19, 2008 at 11:08:34AM +0100, Jan Sebosik wrote:
>>>> Hi again
>>>> so it seems to be a problem with HPET timer which is onboard and was  
>>>> enabled. If I turned him off, (acd | cd) problems went away.
>>>> Jan Sebosik napsal(a):
>>>>> Hi all
>>>>> OS: Freebsd 7-STABLE from CVS of today
>>>>> Problematic HW: Intel DQ45CB  (Q45 chipset, ICH10, SATA in native 
>>>>> mode, but not AHCI), LG SATA DVD-RW GH20NS15
>>>>> Problem: if I run freebsd without LG DVD connected to any SATA port 
>>>>>  onboard everything works allright. When I connect SATA DVD to 
>>>>> board,  then freebsd refuses to boot with messages similar to 
>>>>> those:
>>>>> acd0: FAILURE-READ_BIG timed out
>>>>> unknown: FAILURE-READ_BIG timed out
>>>>> cddone: goit error 0x5 back
>>>>> Messages are repeating forever.
>>>>> Anybody knows where should be a bug?
>>>>> Temporary I`ve disconnected LG SATA burner from system board.
>>>>> Thanks for any idea.
>>>>> Best regards
>>> Are you ***absolutely 100% certain*** this is true?  The time counter
>>> selected shouldn't have anything to do with the errors you see.
>>> Please thoroughly test this.
>>> I'd CC jhb@ to get confirmation of my statement, but I've promised
>>> myself I wouldn't bother him until 2009.  :-)
> This is very bizarre.  The errors being returned from acd0 are that an
> ATAPI/ATA command (READ_BIG, whatever the code for that is) did not
> receive a response from the controller or device within 5 seconds
> (assuming the ata(4) timeout values here; it could be something larger
> for ATAPI, I don't know).  Maybe some a BIOS bug...
> Can you show us output from the following two commands?
> sysctl kern.timecounter.choice
> sysctl kern.timecounter.hardware
> Soren, do you know how/if the HPET time counter could cause this oddity?
> All of my systems use ACPI-fast, so I can't test this.

Jan Sebosik, Slovakia
sebosik at

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