Where great old Macs live again!

SE/30 scsi drive issue

Here's an interesting one. I have an external SCSI case that holds around a 700MB hard drive and a Zip 100 drive. I also have an external Apple 300i CD-ROM. I plugged them both into my PowerBook 520c via the HDI-30 port and they all show up, and the CD-ROM is even bootable (I'm sure the others are bootable too, but the hard drive is just for a software archive, and Zip drive is for transferring files from newer computers).

When I plugged these into my SE/30, it wouldn't fully boot, it would just get stuck on the happy Mac. When I booted with just the CD-ROM on, I would get horizontal stripes on the screen. Previous, the hard drive would be fine when I booted it inside the case that the CD-ROM is currently in, and the SE/30 boots fine with all the external drives powered off. I can plug back into the PowerBook 520c and see everything. I matched my SCSI IDs in the SE/30 to the PowerBook, then made sure not to set the external cases in conflict to that. I also make sure that the termination is set on the Zip drive (the end of the chain), and it's set on the internal drive (the beginning of the chain).

0: Internal HDD
1: External HDD
(Software archive)
2: Logic board?
3: CD 300i
4: none set
5: Zip Drive
6: none set
7: none set

Anyone have an ideas? This was supposed to be my master retro SE/30 setup that I'd been dreaming about, and so far it's been a nightmare lol.


Views: 1095

Reply to This

Replies to This Discussion

Here is a great resource for SE/30 symptom troubleshooting.

One thing, the scsi ID #7 should be showing up as the mac itself.

Been a while but ever do I remember the not so fun task of playing with SCSI voodoo.... All that said is to encourage you. Everybody that had external devices on those systems had issues from time to time.
An ID should be as below:
0: Internal HDD
1: Available
2: Available
3: Available
4: Available
5: Available
6: Available
7: Logic board
(this give you SCSI ID's 1-6 to set your external devices to)

While it is hard for me to diagnose from a distance, the first thing that I think is a clue is what you said about the hard drive working in the CD-ROM. Typically those old enclosures had their own SCSI ID selectors and that may be why the drive worked in the enclosure but not out of the enclosure. I think U still have SCSI ID conflicts; be very methodical. Choose one device, and work with it and the SE-30 till both boot together smoothly. Follow the advice from the link below.
If you continue having problems try running disk repair to see if disk boot data corruption may have occurred.
If the disk driver can be reloaded in Disk drive setup try that also.
Additionally, although not always reliable, try booting these devices after the Mac is up and running; they may not mount but SCSI Probe will see the device and what ID its occupying. This helps rule out the working devices from the suspect devices.
One last thought: make sure all cables and pins are clean, undamaged and fully connected before starting any equipment up. If there is even a chance a cable could be bad, get another known good cable to test if the same results occur or if this corrects the issue. Best regards.

Thanks everyone for the suggestions!

Wait until you hear the answer…

I talked to a friend of mine that is an Authorized Apple Seller that used to do repairs in the 80s and 90s. He suggested using an app called SCSI Probe. So I booted up the SE/30, then turned on the SCSI drives. Once they all sounded like they were loaded, I fired up SCSI Probe, it gave me a list of drives, including the external ones that weren’t showing up. It reported that all my IDs were ok, everything matched to what I had in my ID list. SCSI Probe has an option to try to mount the drives that aren’t showing up. When I clicked “Mount” a pop up claimed that the SCSI hard drive wasn’t compatible with the SE/30 due to being more than 4GB, which wasn’t true at all, the SCSI drive is only 700-some-odd-MB.

So I thought to myself, ok, there must be a formatting issue with the drive, I’ll just wipe it and reload the data. So I started up Apple HD SC Setup to reformat, but just before I did, I thought, “hmm, maybe I’ll just click to update the drivers on the drive”…BAM, drive mounted, CD ROM mounted, and Zip disk showed up.

I finally have my “ultimate” SE/30 setup:
Internal boot HDD, internal floppy, external software HDD, CDROM, and Zip 100!
Now, if only those SCSI to ATA adaptors weren't ridiculously expensive, I’d go to a solid state boot darive

Here's what SCSI Probe looks like:

Excellent! Glad to hear you were able to resolve it this way. It's one those issues that can result in headaches but once the Hard Disk Driver is reloaded these issues clears up sometimes.
Thanks for the mention and photos of SCSI Probe utility software; this or a similar utility are a must have when dealing with SCSI issues. Thanks for the update and how it all got resolved. Enjoy that SE-30; they have such a charm about them.




© 2021   Created by James.   Powered by

Badges  |  Report an Issue  |  Terms of Service