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[InsectorX]

I have a LaCie External SCSI Hard drive.  I opened it and took out the drive, and installed it into my Power Macintosh 8600/300.  It booted to a gray screen with a cursor and was stuck there (although I could move the cursor).  When I removed the Hard drive, then the computer was back to normal, booting from it's original drive.  Is there some specific jumper setting I need to set, or what?

[Mat]

What´s happening if you use the boot shortcuts like "Command+Alt+Shift+Backspace" for "not using the bootpartition that is adjusted" (in the control panel)?

Is the HD terminated correctly? Is it for sure another SCSI-ID than the internal CD-drive?

[InsectorX]

What´s happening if you use the boot shortcuts like "Command+Alt+Shift+Backspace" for "not using the bootpartition that is adjusted" (in the control panel)?

floppy disk icon with "?" symbol.  even after i let go of the key combo

Is the HD terminated correctly? Is it for sure another SCSI-ID than the internal CD-drive?

The last HD on the internal SCSI chain has the default jumper settings for termination that came with the mac.  I am a pretty confused though about teh J6 jumpers.  and how I setup the scsi ID.   On a Seagate Barracuda, is it the section marked "Address"?  because I've tried those and it didn't fix anything.

I've been researching scsi, but there are so many different kinds that i can't find the proper settings for my hd.  The HD has a printed map of the jumpers, but I don't understand it.

EDIT:  I feel that I understand most of the jumper settings.  I have the last drive on the scsi ribbon, set to terminate.  (Does the "T" with a down arrow mean terminate?)  Although, I don't know if I need to mess with the jumpers on the bottom of the drive too.  It has settings like TP from bus, TP from drive, Drive start enable, delay drive start. 

I'm sure that i have the scsi id set right too.  But I still boot to a gray screen with a cursor

oh man

[InsectorX]

I have the last device terminated (I think the jumpers are correct) and set as id 0 (last on scsi chain)
&
Everything works when the 2nd drive isn't connected.

I've set the 2nd drive as id 1.

(also the 2nd drive works fine if I disconnect the id 0 drive)

but when they're connected at the same time, i get the gray screen with no icon.  But I do get a cursor that moves around.  Hmm.

[Mat]

So if both drives are working when the other one is not attached, you are facing some classical SCSI conflict(s).
Start by selecting a different ID for the new HD, then start to investigate what are the well workings adjustments one the first HD, and try to get as close with the 2nd one. Sadly the jumper meanings are not the same all the time. For example Termination power usually is done by the (onboard) controller, so you should select "TP from Bus", but some HDs offer only "TP On" or similar for putting the Termination Power thrugh, but some even create an own TP and call that jumper also just "TP", ...
Check as well the other drives at the Bus, like the CD or a ZIP, or whatever.
If you don´t get to a solution, you can post pictures of both HDs jumper explenations here and we will iron out the problem together.

[DieHard]

Read this post (it may help)
http://macos9lives.com/smforum/index.php/topic,1712.0.html

Also make sure you know the ID of the card

[InsectorX]

Read this post (it may help)
http://macos9lives.com/smforum/index.php/topic,1712.0.html

Also make sure you know the ID of the card

Thank's for the link, great post.

you can post pictures of both HDs jumper explenations here and we will iron out the problem together.

I feel like my setup should work, after reading diehards post.

Maybe im just interpreting the jumper settings wrong.

see this pic:

https://postimg.org/image/a176ms7yv/

[Protools5LEGuy]

[InsectorX]

If you don´t get to a solution, you can post pictures of both HDs jumper explenations here and we will iron out the problem together.

I still haven't come up with a solution.  I even bought a book about SCSI and couldn't find the answer. 

Here are my jumper settings for each hard drive (also I am guessing at some of the jumper meanings, possibly.  I can't find any info online)

Internal Hard Drive #1:
-Mac OS 9.2.2 boot disk
-Last Device in physical internal SCSI chain.
-SCSI ID 0  (I know this through SCSI Probe 100%)
-J6 Jumpers  -->  NO Jumpers
-J2 Jumpers  -->  TP from Bus  &  TERM Enable

Internal Hard Drive #2:
-Mac OS 7.5.5 boot disk (will format this drive once it's set up)
-in the middle of the internal physical SCSI chain
I think i have it set to SCSI ID 3  (see below)
-J6 Jumpers  --> Jumper installed on ADDR 2
                        (I'm hoping that this makes this SCSI ID 2)
                        (I have also tried SCSI ID 1 Before)
-J2 Jumpers  --> TP FROM BUS 
                        (have tried with, and without this jumper)

Still starting up to a gray screen with a cursor, but no happy mac, or question mark, or anything like that.

Also, my other devices SCSI ID's are:

internal CD-ROM Drive  -->  SCSI ID 3
External CD Burner -->  SCSI ID 4

Any Ideas?  Am I missing something?

[DieHard]

Here are my jumper settings for each hard drive (also I am guessing at some of the jumper meanings, possibly.  I can't find any info online)

Internal Hard Drive #1:
-Mac OS 9.2.2 boot disk
-Last Device in physical internal SCSI chain.
-SCSI ID 0  (I know this through SCSI Probe 100%)
-J6 Jumpers  -->  NO Jumpers
-J2 Jumpers  -->  TP from Bus  &  TERM Enable

OK, Lets break it down... There is NO TP from bus (as you mentioned) on that drive;

There are only 2 settings, TP from drive and TP TO bus, if you are doing TP to bus you are most likely causing "Overvoltage" on the SCSI Bus

Step 1) REMOVE ALL Jumpers from J2 if the Cable has a terminator (square block attached to it) or leave 1 jumper on "Term enabled" if cable is missing block

The internal card is ID 7 and you can read the details here
http://tim.id.au/laptops/apple/legacy/pm8600.9600.ws9650.pdf

Internal Hard Drive #2:
-Mac OS 7.5.5 boot disk (will format this drive once it's set up)
-in the middle of the internal physical SCSI chain
I think i have it set to SCSI ID 3  (see below)
-J6 Jumpers  --> Jumper installed on ADDR 2
                        (I'm hoping that this makes this SCSI ID 2)
                        (I have also tried SCSI ID 1 Before)
-J2 Jumpers  --> TP FROM BUS 
                        (have tried with, and without this jumper)

The bus should supply term power and NO drives should have term power enabled, TP from bus should be fine and SCSI ID 1 or 2 should be also fine, make sure No termination jumper exists

internal CD-ROM Drive  -->  SCSI ID 3

No Problems there...just make sure no termination jumper exists

External CD Burner -->  SCSI ID 4

Try removing the external chain for troubleshooting, reconnect when inetrnal chain is all good, make sure last external device is terminated.

[ovalking]

I've always found SCSI a very fussy technology, with seemingly illogical behaviour from simple changes.
After your difficulties, I think I'd be putting that disk back in its external enclosure!

Internal Hard Drive #2:
 -Mac OS 7.5.5 boot disk (will format this drive once it's set up)
 -in the middle of the internal physical SCSI chain
 I think i have it set to SCSI ID 3  (see below)
 -J6 Jumpers  --> Jumper installed on ADDR 2
                         (I'm hoping that this makes this SCSI ID 2)
                         (I have also tried SCSI ID 1 Before)
 -J2 Jumpers  --> TP FROM BUS 
                         (have tried with, and without this jumper)

Which model Barracuda is this? The ones I've seen have the SCSI address on J4.
If the pins are numbered 8421 then a jumper on 2 is indeed ID 2.
If thy are numbered 210 then a jumper on 2 is ID4.

I recall the 8600 has seperate internal and external SCSI buses, so you can have upto 14 devices instead of 7.
Can you connect your problem drive to the external bus, but mounted internally? Then use the same ID and term settings as you used externally.

[InsectorX]

Internal Hard Drive #2:
 -Mac OS 7.5.5 boot disk (will format this drive once it's set up)
 -in the middle of the internal physical SCSI chain
 I think i have it set to SCSI ID 3  (see below)
 -J6 Jumpers  --> Jumper installed on ADDR 2
                         (I'm hoping that this makes this SCSI ID 2)
                         (I have also tried SCSI ID 1 Before)
 -J2 Jumpers  --> TP FROM BUS 
                         (have tried with, and without this jumper)

Typo.  I meant to say "I think i have it set to SCSI ID 2"  not 3.  Sorry

[InsectorX]

Here are my jumper settings for each hard drive (also I am guessing at some of the jumper meanings, possibly.  I can't find any info online)

Internal Hard Drive #1:
-Mac OS 9.2.2 boot disk
-Last Device in physical internal SCSI chain.
-SCSI ID 0  (I know this through SCSI Probe 100%)
-J6 Jumpers  -->  NO Jumpers
-J2 Jumpers  -->  TP from Bus  &  TERM Enable

OK, Lets break it down... There is NO TP from bus (as you mentioned) on that drive;

There are only 2 settings, TP from drive and TP TO bus, if you are doing TP to bus you are most likely causing "Overvoltage" on the SCSI Bus

Step 1) REMOVE ALL Jumpers from J2 if the Cable has a terminator (square block attached to it) or leave 1 jumper on "Term enabled" if cable is missing block

The internal card is ID 7 and you can read the details here
http://tim.id.au/laptops/apple/legacy/pm8600.9600.ws9650.pdf

Internal Hard Drive #2:
-Mac OS 7.5.5 boot disk (will format this drive once it's set up)
-in the middle of the internal physical SCSI chain
I think i have it set to SCSI ID 3  (see below)
-J6 Jumpers  --> Jumper installed on ADDR 2
                        (I'm hoping that this makes this SCSI ID 2)
                        (I have also tried SCSI ID 1 Before)
-J2 Jumpers  --> TP FROM BUS 
                        (have tried with, and without this jumper)

The bus should supply term power and NO drives should have term power enabled, TP from bus should be fine and SCSI ID 1 or 2 should be also fine, make sure No termination jumper exists

internal CD-ROM Drive  -->  SCSI ID 3

No Problems there...just make sure no termination jumper exists

External CD Burner -->  SCSI ID 4

Try removing the external chain for troubleshooting, reconnect when inetrnal chain is all good, make sure last external device is terminated.

Thanks for the advice.  I made all those changes, and I'm still getting a gray screen at boot up.

Both Drives boot up fine when plugged in by themselves.  But they won't work together.

I've always found SCSI a very fussy technology, with seemingly illogical behaviour from simple changes.
After your difficulties, I think I'd be putting that disk back in its external enclosure!

I'm trying to get this computer set up at work.  And I have one power outlet in my room. 

Which model Barracuda is this? The ones I've seen have the SCSI address on J4.
If the pins are numbered 8421 then a jumper on 2 is indeed ID 2.
If thy are numbered 210 then a jumper on 2 is ID4.

Seagate Barracuda 9GB
product id: 9N3004-YYY
Serial number:  3BNoz631

I recall the 8600 has seperate internal and external SCSI buses, so you can have upto 14 devices instead of 7.
Can you connect your problem drive to the external bus, but mounted internally? Then use the same ID and term settings as you used externally.

It does have 2 SCSI Buses - 0 and 1

But how do i connect it externally and mount it internally?