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Topic |
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cinemafia
Guerrilla Recon Leader
USA
2965 Posts |
 Posted - 27 Jan 2003 : 09:29:13
I'm trying to get an external SCSI drive working on my Plus, and it's being difficult. I'm booting from one of 3 copies of System Six (6.0, 6.0.7 and 6.0.8) with a 1.9GB Quantum drive in an external case. Only, after the "Welcome to Macintosh" splash screen, I get a "No Coprocessor" error if the external SCSI drive is powered on. I can't remember what the heck is on the 1.9GB drive, but I'm pretty sure it is HFS and not HFS+ formatted. I'm going to try a 210 and a 80MB drive in the case instead and see what happens...666th poster and 666th thread-creator
Mod of the Mac II series Forums
Total 68K Macs liberated: 7
My Site: http://cine.sytes.net
My Hardware Page: http://cineware.sytes.net |
cinemafia
Guerrilla Recon Leader
USA
2965 Posts |
Posted - 27 Jan 2003 : 09:49:36
Well, it's working fine with the 210MB drive, I think maybe System 6 can't handle a 1.9GB drive? Or maybe just a 000? Dunno...I've never had anything large than 250MB connected to a Plus. Anyway, I'll just use the 1.9GB in my ColorClassic once the LC 575 mobo arrives...  Now it's time to install System 6 on the 210 drive and have some fun!666th poster and 666th thread-creator
Mod of the Mac II series Forums
Total 68K Macs liberated: 7
My Site: http://cine.sytes.net
My Hardware Page: http://cineware.sytes.net |
G4from128k
Full Member
USA
873 Posts |
Posted - 27 Jan 2003 : 09:58:48
Could it be that the drivers on the 1.9 GB disk are "too advanced" for System 6? You could try using HD Setup on your Plus and see if it recognizes the drive and is willing to reinitialize it. Of course, you'd have to be willing to erase the 1.9 GB drive and even then it might not work. Hmmm.. maybe that 210 drive is more than good enough.best wishes, G4From128k by Day: Mild-Mannered Engineer and Trapeze(tm) Artist
by Night: Colonel of Truth, Justice, and the Macintosh Way
Reserve Officer in 68kMLA Cantankerous Coot Contingent
& User of the Hockey Puck Mouse of Radial Symmetry |
FireWire is fast
General, 4 star
USA
1559 Posts |
Posted - 27 Jan 2003 : 11:58:10
Isn't there some different formatting ratio (or something like that?) for the Plus which would require you to reformat your drive with an older utility or FWB HD Toolkit with some setting...I don't know...this issue was discussed in a MAF Vintage Macs thread many moons ago...DVPierce comes to mind...--------------------
master of the Quadra/Centris Stick of Justice™ and figure-head of the Peoples' PDS Republic
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cinemafia
Guerrilla Recon Leader
USA
2965 Posts |
Posted - 27 Jan 2003 : 12:05:13
quote:
You could try using HD Setup on your Plus and see if it recognizes the drive and is willing to reinitialize it.
The Plus won't boot with the 1.9GB drive attached to it at all. I can try putting the 1.9 in my 840av and reformat it using HD Setup to see that if that puts 000/System 6-friendly drivers on it. I am still having a different problem with the 210MB drive. I clean formatted it with HD Setup and it seems fine but it won't boot from it. I can copy and install stuff on it, but even with a valid System Folder the Plus won't boot from the drive. I should see if the same thing happens with the 80MB... 666th poster and 666th thread-creator
Mod of the Mac II series Forums
Total 68K Macs liberated: 7
My Site: http://cine.sytes.net
My Hardware Page: http://cineware.sytes.net |
The Czar
Starting Member
Canada
28 Posts |
Posted - 27 Jan 2003 : 16:48:04
Yeah, you have to use a 3:1 interleave ratio on the Plus and 1st gen SE's (Not sure about the SE's though). The reason it could be looking for the coprocessor is because an extension may require one to load (not sure what extension could do it, but I've heard of it before).Hope this helps. Real Men Use 68k |
~Coxy
Leader, Tactical Ops Unit
Australia
2822 Posts |
Posted - 28 Jan 2003 : 05:29:58
The SEs use a 2:1 ratio, from memory. The Mac II and up use 1:1 interleaving.~Coxy - Leader, Tactical Operations Unit
Mayor of NuBus City v3.0
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Eft37
Junior Member
USA
193 Posts |
Posted - 29 Jan 2003 : 13:58:47
How did this turn out?
I'm trying to move a 160MB drive into the enclsure that the 40MB came in for the Plus, but it seems if I use my 8600 to format either drive, I get problems, but the Plus will format the 40MB, but not the 160MB (both Apple ROM'd).
Goal is system 7.5.3 on the 160MB drive to run MS Office on a Plus.
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cinemafia
Guerrilla Recon Leader
USA
2965 Posts |
Posted - 29 Jan 2003 : 15:18:54
I can use the 210MB in the external drive with the Plus,. but it won;t boot from it. I have to boot from a floppy and use the 210MB as storage. I think I'll wait 'till I get a hold of a SC20, which is what I want anyway, before I do anymore tinkering.666th poster and 666th thread-creator
Mod of the Mac II series Forums
Total 68K Macs liberated: 7
My Site: http://cine.sytes.net
My Hardware Page: http://cineware.sytes.net |
G4from128k
Full Member
USA
873 Posts |
Posted - 08 Feb 2003 : 13:11:26
Ran across this explanation for why that 1.9 Gb disk may not work on your Plus.quote:
2.2.3 - Why won't my Mac Plus see the external HD I use with my other Macs?The buffer on many older HDs is rather small, and the SCSI on the Mac Plus is quite slow. When these two factors are combined, it causes the HD to effectively be "too fast" for the Plus. To get around this, HDs for use with the Mac Plus were often formatted with a 3:1 interleave, which slowed down the data flying at the Plus enough so the Plus could handle it. If your external HD is an older unit and has only been used with Macs newer than the Plus, it probably has a 2:1 or 1:1 interleave and is too fast for the Plus. To remedy this, back up the HD and reformat it on the Plus (or on another Mac, as long as you can specify the interleave ratio). This will make the drive slow enough for the Plus (and probably won't impact its performance on other Macs too negatively). Most newer hard disks have enough cache so as to make interleave ratios irrelevant.
See: http://macfaq.org/hardware/harddisk.shtml#Q2.2.3G4From128k by Day: Mild-Mannered Engineer and Trapeze(tm) Artist
by Night: Colonel of Truth, Justice, and the Macintosh Way
Reserve Officer in 68kMLA Cantankerous Coot Contingent
& User of the Hockey Puck Mouse of Radial Symmetry |
jag
Starting Member
22 Posts |
Posted - 14 Aug 2003 : 15:07:53
Generally speaking, it's always best to use a hard drive that is the same vintage as the plus +/- 4 years or so. Anything over 700 megs will be very tough to work on the Plus because it just can't recognize them due to the fimrware and scsi implementaiton of the Plus. Also they will need to be partitioned, see this page for details:http://jagshouse.com/hard_drive_size.html JAG http://www.jagshouse.com - the web's oldest classic Mac site, used Mac goodies for sale. |
1.9GB SCSI on a Plus
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