DragonFly BSD
DragonFly bugs List (threaded) for 2004-07
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Re: LiveCD Problems

From: Garance A Drosihn <drosih@xxxxxxx>
Date: Sun, 4 Jul 2004 21:01:30 -0400

At 4:41 PM -0500 7/4/04, Shawn wrote:
On Sat, 3 Jul 2004 10:36:03 -0700 (PDT), Matthew Dillon
<dillon@xxxxxxxxxxxxxxxxxxxx> wrote:

:1) dmesg | less shows that DF thinks I don't have an ATA-66 cable or : something of the like on my first IDE interface where my (only) hard
 > : drive is connected, I do have an ATA-133 rated cable, and the hard
 > : drive is an ATA-100 device.
     One thing to note here... there's a good chance that you don't
     actually have an ATA-133 rated cable.  There are a ton of cables
     being sold that look like they ought to be ATA-133 (e.g. they have
     the double density wires), but in fact are not.  I had a similar
     scratch-the-head situation and replacing the cable fixed the

Well, I don't believe this, but I pulled out an ole' crufty looking double density wire IDE cable from my closet swapped out the one that came with my motherboard (Gigabyte) and rebooted, and now suddenly dfly does UDMA100. What I don't understand is why both the Linux Kernel and Windows XP ran the HD with the other cable at UDMA100 without any problem.

Fwiw, I once had a system setup with multiple-OS's, and had a similar problem where FreeBSD wouldn't recognize a drive as ATA/100 while some other OS's seemed to be happy (*). Years went by without me figuring it out. Finally it was time to ugprade, and while moving hard-disks to a new machine I noticed that the IDE cable had been put in backwards. The end that was supposed to plug into the drive was plugged into the motherboard, and (obviously) visa-versa. I switched the cable around so that it was connected correctly, booted up, and FreeBSD was happy with it. So then I shutdown the PC again and moved the hard drive to the new PC. I managed to figure it out on the very day that "it just didn't matter anymore"...

(* - I know that the other OS's *reported* an ATA/100 connection, but
I never checked to if they were really using the drive at that speed.
Also, this was long enough ago that it might have been ATA/66 and not
ATA/100, but the basic idea is the same).

Garance Alistair Drosehn            =   gad@xxxxxxxxxxxxxxxxxxxx
Senior Systems Programmer           or  gad@xxxxxxxxxxx
Rensselaer Polytechnic Institute    or  drosih@xxxxxxx

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