SCSI HD Jumper Settings (The Battle Continues) |
October, 23, 2003 12:15 PM |
thom |
Alright, first, thanks everybody for their help on getting this computer going. It's not there yet, but it has consumed most of my wallet. (See, "can't LOAD from this device error") As told, I got my hands on a 9.1 GB Seagate Hard Drive for this computer to replace the old 4 GB IBM drive. Simply swapping the drives proved stupid. Couldn't even get the computer to start from the CD. Just gets to the happy mac, and does nothing. I'm guessing a SCSI issue. The problem being, is that I cannot for the life of me decipher these jumper settings. So here's where I'm asking for help. I have taken photos of everything relevant, and used HomePage for the very first time: http://homepage.mac.com/tekcor/ PhotoAlbum1.html I think everything on the photos is clear, but if you can't read something, please ask. I really need help on this one. Thank you. |
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RE: SCSI HD Jumper Settings (The Battle Continues) |
October, 24, 2003 4:53 PM |
sneitzel |
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It was on the internal bus. This was a full height drive mounted on the drive sled in the lowest of the 4 drive bays in the 9600. Then the ZIP above it, CDRW and CDROM on top. I had taken the floppy drive out completely. Scott |
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RE: SCSI HD Jumper Settings (The Battle Continues) |
October, 24, 2003 3:29 PM |
tempest |
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When I read your message, it didn't sound right because all HDs are in the bottom of the towers. My DVD-ROM drive is first on the chain. I cannot install my DVD-ROM at the end. How are you doing this? Or is this your external bus? |
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RE: SCSI HD Jumper Settings (The Battle Continues) |
October, 24, 2003 12:21 PM |
smwalker |
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The good folks at Seagate may send you more jumpers, or try a used computer store, or an Apple store. I would not use aluminun foil & risk damage. |
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RE: SCSI HD Jumper Settings sneitzel |
October, 24, 2003 12:15 PM |
jseibyl |
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makes sense, don't have my adapter cheat sheet on me right now, thanks for clarifying |
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RE: SCSI HD Jumper Settings (The Battle Continues) |
October, 24, 2003 9:34 AM |
sneitzel |
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Jim, I believe the SCSI IDs are as follows: ID0 = 1 ID1 = 2 ID2 = 4 ID3 = 8 So for a SCSI ID of 5 you would need jumpers on ID0 and ID2 (1 + 4). Scott |
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RE: SCSI HD Jumper Settings (The Battle Continues) |
October, 24, 2003 9:30 AM |
sneitzel |
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tempest, I have to disagree. Luck had nothing to do with it. The SCSI cable went from the connector on the MB to the HD to the ZIP to the CDRW to an empty connector and ended at the CDROM which is why it was terminated. The SCSI cable did not have a built in terminator (like some other Macs I have worked with, the 6400 for example) When I say 1st on the chain I meant closest to the MB. Last means on the end farthest away from the MB. Scott |
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RE: SCSI HD Jumper Settings (The Battle Continues) |
October, 24, 2003 7:09 AM |
jseibyl |
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okay, you will see on the new drive that there is a little jumper block on the J2 connections, if you want to run that in the middle, try removing that, and set the "enable motor start" jumper to spin it up as soon as you get power to it. You set the ID # from the apapter on the back and you can set the ID # by a adding jumpers. For example if you put a jumper on the id0, AND id3, I believe that will set the drive to id 4. That jumper block is if you are putting that drive at the END of your chain, where the old drive was. Don't terminate in the middle of the cable, or you will have issues. Termination should be at the END of the cable. Keep us posted and good luck, Jim |
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RE: SCSI HD Jumper Settings (The Battle Continues) |
October, 24, 2003 2:50 AM |
tempest |
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You shouldn't have 2 devices terminated. Only the last physical device off the cable should be terminated. Using aluminum foil is asking for trouble, especially if you short your single ended jumpers. Keep your old drive where it is and insert your Seagate in between your CD-ROM and old IBM. If you don't have enough connectors, get another cable. |
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RE: SCSI HD Jumper Settings (The Battle Continues) |
October, 23, 2003 11:55 PM |
thom |
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Here's the update. Have used the Seagate site to determine that there is another set of pins on the underside of the drive. What I posted only sets the ID, which the adapter does in this case. There is some debate as to wether or not I should use 0 or 1. The old drive was at 0, so I'm guessing I should stick with that. Since this is the first device on the chain, I need to enable termination on the drive. My setup is simple: HD - 0 terminated, CD - 3 terminated. Nothing in the middle. My problem is such. I do not have jumpers small enough to fit the other set of pins. they are the same width, but the Apple hard drive mount gets in the way when a jumper is installed. Aluminum foil has been suggested. Is this a good idea. Also, the HD came with this note: "Try putting the drive between 2 devices on the ribbon cable, never at the end. This is a 16-bit device, and that adapter only terminates 8 bits. You need to put another device behind it to take care of the other 8 bits." This is not an option for me, I don't have another device. Am I fucked? |
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RE: SCSI HD Jumper Settings (The Battle Continues) |
October, 23, 2003 7:49 PM |
tempest |
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I was able to get my drive to boot in my 9600 by doing basically what Ed notes above. The HD was 1st on the ribbon cable set to ID:1, I had a zip drive next set to ID:4, then a Yamaha CDRW set to ID:5 and finally the stock CDROM set to ID:6 with termination enabled on that drive only. You got lucky and got a working configuration. By enabling your stock CD-ROM's termination, you are violating SCSI's termination scheme. The connection to the Mac's SCSI connector is terminated, and the other physical end should be terminated, not a device in the middle of your chain. Your chain looks like this (correct?): Mac, ID6, ID5, ID4, ID1. Your HD ID=1 should have its termination set. |
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RE: SCSI HD Jumper Settings (The Battle Continues) |
October, 23, 2003 5:15 PM |
sneitzel |
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The adapter card that you have plugged into the SCSI drive looks identical to the one I had (also running a 9GB Seagate Barracuda). I have since sold that machine and do not have the documentation but I do know that on my system the SCSI IDs were set on the adapter card and not on the drive itself. The set of jumpers on the right side of the adapter card is where all the magic will happen. There should be some labeling on that edge of the card. Can you get a clear picture of that? I was able to get my drive to boot in my 9600 by doing basically what Ed notes above. The HD was 1st on the ribbon cable set to ID:1, I had a zip drive next set to ID:4, then a Yamaha CDRW set to ID:5 and finally the stock CDROM set to ID:6 with termination enabled on that drive only. The only issue I had was that my drive would not spin up fast enough to cold boot the machine. It would start up and I would get a flashing ?. If I then did a warm reboot it would see the SCSI drive and boot normally. (FYI, Boot delay was disabled on the drive). See if that will get you going and keep us posted. Scott |
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RE: SCSI HD Jumper Settings (The Battle Continues) |
October, 23, 2003 5:13 PM |
tempest |
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If you have no other jumpers on the drive besides the ones in the front, you need an active terminator for your drive if all you have is this Seagate. Otherwise, what I would recommend is keep your IBM at the end of the physical chain and connect this Seagate in between--changing its SCSI ID as per Ed's suggestion. If you have another set of pads, then you have an LVD drive, which means you need to place a jumper on the force single ended connection. |
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RE: SCSI HD Jumper Settings (The Battle Continues) |
October, 23, 2003 4:38 PM |
egonzales21 |
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You apparently has a 68 pin SCSI drive, the Seagate and using a 68pin to 50 pin adapter to attach to your existing SCSI chain. Currently your Seagate is set to ID 0 - no jumpers. Also almost all 68 pin drives cannot be set to terminate, they are usually terminated with an active terminator that one attaches to the SCSI chain. I would suggest that you place the Seagate drive between the CD ROM drive and the IBM drive with SCSI termination enabled in the IBM drive. Termination enabled would have been the default setup for the IBM drive. However the default ID for the IBM would also be 0. You will have to change the ID of one of the hard drives to something other than 0. One jumper on pins 1,2,or 3 will do it but do not pick 3 which is the default ID for CD ROM's. Good Luck Ed |
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RE: SCSI HD Jumper Settings (The Battle Continues) |
October, 23, 2003 1:22 PM |
gregoryy |
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Look up the model number on www.seagate.com and it explains the jumpers. There are also some other good online explanations. perhaps www.scsifaq.com will. Hitachi also has good online reference and a SCSI FAQ and troubleshooting. As does www.attotech.com |