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Date:      Fri, 26 Jan 2001 18:23:10 -0600
From:      David Kelly <dkelly@hiwaay.net>
To:        "3Phase" <Phase3@worldnet.att.net>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: Chicken vs Egg 
Message-ID:  <200101270023.f0R0NAG19791@grumpy.dyndns.org>
In-Reply-To: Message from "3Phase" <Phase3@worldnet.att.net>  of "Thu, 25 Jan 2001 22:24:08 PST." <01b201c08760$a712a100$7ea0480c@sisyphus2> 

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"3Phase" writes:
>  FreeBSD 4.0 A full 4.4 BSD Lite Based 32-bit Operating System.

4.0 is the first RELEASE of the much overhauled ATA system. 4.2 is 
recommended.

>  The install kernel won't recognize and use DMA and LBA on my Compaq
> Deskpro.
> How do I activate DMA and LBA for my Deskpro BEFORE I partition the drive?
> They are BOTH enabled in the BIOS.

I'd direct my continued research into "geometry" of disk drives. There 
is (or used to be) a geometry option in the labeling/partitioning part 
of sysinstall. Never used it myself. But remembered that it wanted to 
know out how DOS/Windows was doing things so it could do the same. And 
the option was there only to override the auto guess.

> DMA isn't that critical right this minute but `Bad things happen' if you
> switch from CHS to LBA after installing partitions.
> 
> 
>  I'm copying this from an envelope I wrote the dmesg text output on. No
> printer, yet.
> 
>  pcib0: <Host to PCI bridge> om motherboard
> pci0: <PCI bus> on pcib0
> atapci0: <Intel PIIX3 ATA controller> port 0x1200-0x120f at device 20.1 on
> pci0.
> ata0: at 0x1f0 irq 14 on atapci0 (the Maxtor drive)
> ata1: at 0x170 irq 15 on atapci0 (my cd-rom drive)
> ad0: 43967MB <Maxtor54610H6> [8933/16/631] at ata0 master using BIOSPIO

This is what the exact same drive looks like on my system, connected to 
a secondary-on-MB Promise ATA-100 controller. By any chance did you 
transpose the 1 at the end of 89331 on to the end of 63?

ad4: 43967MB <Maxtor 54610H6> [89331/16/63] at ata2-master UDMA100

Heck, I don't really know if I have LBA on or not. But I've seen over 
23MB/sec on the drive using bonnie. This drive has never been seen by a 
Windows OS since I opened its anti-static bag.

--
David Kelly N4HHE, dkelly@hiwaay.net
=====================================================================
The human mind ordinarily operates at only ten percent of its
capacity -- the rest is overhead for the operating system.




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