🚀 go-pugleaf

astuart@netcom.com (Wintermute) writes:

>  Okay.  I hope to hell someone else has had this problem cuz it is 
>confusing the Bejeezus out of me.  Maybe I'm doing something really 
>obviously wrong, but I like to think I know about SCSI devices seeing as 
>I set them up and configure them for my Mac and IBM "friends"  (You can't 
>call a non-amiga owner a true friend, in my book =).
>  When I bought my Amiga 3000, I took the Harddrive from my 2000 and 
>swapped it in there.  I had removed the terminating resistors from my 
>Harddrive (Quantum) when it was in the 2000 because the 2000 also had an 
>internal CD ROM drive.  I forgot to terminate the Quantum when I put it 
>in the 3000, but for some reason it worked just fine.  So I didn't bother 
>to terminate it when I ran across the resistors in my desk drawer.  The 
>Quantum was magically working unterminated... so why sweat it?
>  Last week I bought a new Maxtor drive.  The Amiga 3000 only fits two 1" 
>drives or one Half-height drive.  Although my new Maxtor is a 1", the old 
>Quantum is Half-height so I'll have to use it for something else once I 
>have copied the contents onto the Maxtor.
>   The Quantum is device 0.  It is on the 3000's built-in controller (of 
>course).  The Maxtor, is device 6, I just left the jumpers set to factory 
>default right now, which is 6.  (Yes, I looked.  I don't believe 
>everything I read in manuals.)  The Maxtor is properly Terminated.  I 
>should be able to just plug it into the power and make it the last device 
>on the SCSI ribbon and copy the Quantum onto the Maxtor and wash my hands.
>   So when I plug in the Maxtor and power-up, my 3000 starts up and loads 
>my ROMimage off of the Quantum.  (It's one of the old 3000s that loaded 
>their ROMs from whichever device was named WB_2.x.)  It loads the ROM 
>image fine and reboots.  Once it reboots, it cannot find the Quantum 
>drive.  It finds the Maxtor, which is useless due to it having nothing on it.
>   I was able to low-level format the Maxtor like this:  I power up with 
>only Quantum connected to power.  My ROM image loads... Amiga reboots... 
>Amiga finds Quantum just fine and loads workbench.  Then I plug the power 
>into Maxtor.  HDToolBox then recognizes both drives and I can partition 
>and low level format Maxtor.  Of course, in order to save the new 
>settings and mount it, I have to reboot.  As soon as it reboots, the 
>Amiga once again can't find Quantum.  Even holding down both mouse 
>buttons at startup and listing all the devices won't show me Quantum.  If 
>there's power to Maxtor, Quantum don't exist... unless of course I boot 
>with Quantum and then plug in Maxtor later.
>  The weirdest thing is, it DOES find Quantum long enough to load the ROM 
>images from disk... then it disappears.
>  I swore.  I figgered I'm doing something wrong and I set Maxtor on the 
>shelf to worry about later.
>  Then I got my external CD ROM drive out and plugged it in.  External CD 
>ROM drive is currently set to device 5.  It is terminated.  If I power up 
>with CDROM drive attached and turned on, the system AGAIN can't find 
>Quantum after loading the ROM images.
>  To sum up: The system can't find my unterminated device 0 quantum 
>harddrive unless it is the only SCSI device getting power.  (Its not a 
>power problem either or the CDROM drive wouldn't puke... it's powered 
>externally).  The only exception is before the Amiga 3000 loads it's ROM 
>images, in which case it does find Quantum long enough to load it's ROMs.
>  Does anyone have any idea?  I'd be so grateful for advice.

>--
>"When they're flying-high, a pack of crack-crazed    | -Allen Wintermute-
>squirrels can chew a man's leg off in no time."      | P.O. Box 4827
>-----------------------------------------------------| San Jose, CA 
>finger astuart@netcom for PGP public key.            |            95150-4827

With a Maxtor in there you *MUST* have two terminations on the SCSI bus. They
do strange things to the bus if you only have one termination. That MIGHT
cure your problem. It was mistermination that caused similar symptoms here
on an A3000 one time.
{^_^}	Joanne Dow, Editor Amiga Exchange, BIX
	jdow@bix.com