SCA hard disk being detected in some capacity, yet will not work entirely - Macintosh Classic

[alectrona6400]

So I went a little insane and I decided to install a 9.1GB Seagate Cheetah ST39204LC hard disk into my Macintosh Classic. However, when I start a patched version of HD SC setup, I get errors that the drive is not mounted or that it cannot be written to. I used an SCA 80 pin to 50 pin adapter with only the ID0 jumper populated. On the hard drive there are additional jumpers to disable parity, write protect, enable motor start, delay motor start, and "force single ended". I'm not too familiar with some of these drives and none of the jumpers have been populated anyway.

Has anyone done this on a 68000 system before? FWB won't work on here.

 

[Nixontheknight]

So I went a little insane and I decided to install a 9.1GB Seagate Cheetah ST39204LC hard disk into my Macintosh Classic. However, when I start a patched version of HD SC setup, I get errors that the drive is not mounted or that it cannot be written to. I used an SCA 80 pin to 50 pin adapter with only the ID0 jumper populated. On the hard drive there are additional jumpers to disable parity, write protect, enable motor start, delay motor start, and "force single ended". I'm not too familiar with some of these drives and none of the jumpers have been populated anyway.

Has anyone done this on a 68000 system before? FWB won't work on here.

try setting the ID to something else like 1. and try using SCSIprobe to see if the bus is terminated

 

[alectrona6400]

Is there a boot disk that has SCSIprobe? I don't have enough resources to get it to the machine manually at the moment.

 

[Nixontheknight]

Is there a boot disk that has SCSIprobe? I don't have enough resources to get it to the machine manually at the moment.

I did make one at one point but I have since lost the file between upgrading computers. You might be able to make one if you have a Mac that can connect to the internet and has a SuperDrive floppy drive

 

[mg.man]

there are additional

You need "Force Single-Ended" and you also need Termination on. I believe there are jumpers to choose whether the drive or the BUS supplies TERM PWR and TERM ENABLE. You need TERM ON. Whether the drive supplies TERM PWR probably won't matter on a Classic.

 

[alectrona6400]

Alright, I just put a jumper on the single ended area on the drive. However I also see that there are 8 jumpers on my SCSI adapter: ID0-ID4, MTR, DLY, SYN, and LED. I don't see anything related to termination on the drive or the adapter...

 

[mg.man]

What's the model of the drive? Also, you may need one of @max1zzz's SCA80 adapters - which has proper termination. I've had very little luck with any of the eBay ones.

 

[3lectr1cPPC]

Is there a boot disk that has SCSIprobe? I don't have enough resources to get it to the machine manually at the moment.

If you want to try SCSIprobe, get it on a floppy (doesn't have to be bootable or anything). Then just start the Mac Classic while holding CMD-OPT-X-O and it should boot from a ROM disk with System 6. From there you can even set it as the startup disk and continue booting from it without typing anything in at startup. Then just launch SCSIprobe from the floppy.

 

[alectrona6400]

What's the model of the drive? Also, you may need one of @max1zzz's SCA80 adapters - which has proper termination. I've had very little luck with any of the eBay ones.

ST39204LC, mfd December 2000

 

[alectrona6400]

What's the model of the drive? Also, you may need one of @max1zzz's SCA80 adapters - which has proper termination. I've had very little luck with any of the eBay ones.

Where can I buy one?

 

[volvo242gt]

You'll want to shoot @max1zzz a PM to buy one.

 

[mg.man]

ST39204LC, mfd December

According to the manual (emphasis mine) - "LC and LW model drives do not have onboard termination circuits. Some type of external termination circuit must be provided for these drives by the end user..."

So, I'm afraid you're going to need a terminated adapter, or cable the drive in such a way that there is a terminator "after" the drive...