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Date:      Tue, 5 Jun 2001 22:49:48 -0500
From:      Doug Poland <dpoland@polands.org>
To:        Dave Duchscher <daved@tamu.edu>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: UDMA100
Message-ID:  <20010605224948.A1934@polands.org>
In-Reply-To: <20010605094253.A19506@net.tamu.edu>
References:  <Pine.LNX.4.10.10106051226450.1508-100000@Sina.sharif.ac.ir> <20010605094253.A19506@net.tamu.edu>

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On Tue, Jun 05, 2001 at 09:42:53AM -0500, Dave Duchscher wrote:
> On Tue, Jun 05, 2001 at 12:30:28PM +0430, Amin Omidzadeh Khosrowshahi wrote:
> > > Hello,
> > > I want to set up a FreeBSD server on a ATA100 HardDisk and want to know
> > if FreeBSD 4.3 kernel supports UDMA100 like 2.4.5 Linux kernel .
> 
> Yes, FreeBSD 4.3 supports UDMA100.
> 
> > If it does, how I can set it up?
> 
> The driver will automatically detect the fastest mode available for the
> drive on boot up.  You should see a line similar to the one below:
> 
>   ad0: 58644MB <IBM-DTLA-307060> [119150/16/63] at ata0-master UDMA100
> 
I'm running 4.3-STABLE with Promise ATA100, IBM-DTLA HD and am getting
only UDMA66.  i.e.,

dmesg | grep -i ata
atapci0: <VIA 82C686 ATA66 controller> port 0xd800-0xd80f at device 4.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
atapci1: <Promise ATA100 controller> port 0x8000-0x803f,0x8400-0x8403,0x8800-0x8807,0x9000-0x9003,0x9400-0x9407 mem 0xce800000-0xce81ffff irq 10 at device 17.0 on pci0
ad0: 43979MB <IBM-DTLA-307045> [89355/16/63] at ata0-master UDMA66
acd0: CD-RW <RICOH DVD/CDRW MP9060> at ata1-master using PIO4

> You should also consult the ata(4) man page as it has lots of useful
> information about the driver's capabilities.
> 
> DaveD
> 
The man page does have lots of useful info but doesn't really tell
admin wannabees exactly how to config the system to boot with UDMA100.
Thanks for your patient understanding...

-- 

Regards,
Doug

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