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Date:      Mon, 6 May 1996 22:13:24 -0700 (PDT)
From:      Doug White <dwhite@riley-net170-164.uoregon.edu>
To:        Robert Nicholson <robert@elastica.com>
Cc:        questions@FreeBSD.ORG
Subject:   Re: problems with disk and power.
Message-ID:  <Pine.BSF.3.91.960506221114.29440F-100000@riley-net170-164.uoregon.edu>
In-Reply-To: <199605020327.XAA00185@justine.elastica.com>

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On Wed, 1 May 1996, Robert Nicholson wrote:

> 1. I've got my machine and an external 4 GIG drive in a APS SR2000
> case.
> The 4 GIG is a Quantum Atlas 34300
> I'm using a ASUS TP4N configuration with an DTC 3130B
> Now, when the power to both items is on ... if I switch my machine off
> I cannot turn the power on again _until_ I've turned off and on the
> power to the external enclosure...
> 
> 2. This ones really bugging me.
> I've got a 2GIG partition on the external enclosure that I'm booting.
> Whenever I repower my machine it takes at least two boots to get
> FreeBSD up and running.
> IT always stops after inetd at boot time and spurts out.
> sd1(ncr0:2:0): COMMAND FAILED (4 28)@f1090a00.
> This happens regularly after switching the machine off and rebooting
> FreeBSD 2.1.
> If I then reboot it will stick at the boot partition and won't even
> execute the kernel. If I switch off and turn everything on again it
> will fsck and boot up fine.

[spaces trimmed]

I've had goofy problems like this with Macintoshes with external 
drives.  The key is the order in which you turn on the devices.  If I 
remember correctly, you want to turn on the external _first_, wait for it 
to spin up, then turn on the CPU.  I think the problem you're running 
into is that the device isn't ready by the time FreeBSD gets to it.  

Perhaps tweaking SCSI_DELAY may help.

Doug White                              | University of Oregon  
Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite    | Computer Science Major




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