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Date: Wed, 27 Apr 2005 10:13:24 -0400
From: jason henson <jason@ec.rr.com>
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To: Rob <spamrefuse@yahoo.com>
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cc: freebsd-questions@freebsd.org
Subject: Re: What is ata2 ?
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Rob wrote:

>--- jason henson <jason@ec.rr.com> wrote:
>  
>
>>Rob wrote:
>>
>>    
>>
>>>Joel wrote:
>>> 
>>>
>>>      
>>>
>>>>On Tue, 26 Apr 2005 18:44:18 -0700 (PDT)
>>>>Rob <spamrefuse@yahoo.com> wrote
>>>>   
>>>>
>>>>        
>>>>
>>>>>I'm running FreeBSD on a range of PCs, from
>>>>>Pentium-1 (60 MHz) to Pentium-4 (2.60GHz), though
>>>>>none but one has a 'ata2' line in the dmesg
>>>>>output:
>>>>>
>>>>>ata0: channel #0 on atapci0
>>>>>ata1: channel #1 on atapci0
>>>>>...
>>>>>ata2: <Generic ESDI/IDE/ATA controller> at port
>>>>>     0x36e-0x36f,0x168-0x16f irq 10 on isa0
>>>>>ad0: 6149MB <QUANTUM FIREBALL EX6.4A/A0A.0D00>
>>>>>    [13328/15/63] at ata0-master UDMA33
>>>>>ad1: 4892MB <QUANTUM FIREBALL EL5.1A/A08.1100>
>>>>>    [10602/15/63] at ata0-slave UDMA33
>>>>>acd0: CDROM <GCR-8521B/1.02> at ata1-master PIO4
>>>>>
>>>>>What is so special about this particular PC, that
>>>>>it has an ata2, unlike all other PCs I have?
>>>>>
>>>>>Can I add more than 4 disks (2 masters + 2
>>>>>slaves)
>>>>>to this PC? Or is this ata2 for something else?
>>>>>          
>>>>>
>>You have more than 2 controllers.  A whole dmesg
>>would help, or just tell us your make/model of
>>your motherboard.
>>    
>>
>
>Don't know the details of my motherboard.
>Whole dmesg output is here:
> http://surfion.snu.ac.kr/~lahaye/dmesg.boot
>
>  
>
So you have an intel 440bx chipset.  From what I see at intel's site 
there is just the standard ide controller on the chipset.  Ata 0 and 1 
are intel for sure, and like some one else said the ata2 is likely an 
add in card or an extra chip on your motherboard.