I've been busy preparing a bunch of old Macs for my garage sale (more details soon), and I've relearned some SCSI voodoo.
I have an external SCSI hard drive with several partitions: Mac OS 7.5.5, 7.6.1, 8.1, and 8.6. It's set to SCSI ID 1, which should never conflict with a Mac's internal hard drive (usually SCSI ID 0) or CD- ROM (usually SCSI ID 3). I boot from the external drive (Shift-Cmd-Opt- Del), wipe the internal hard drive, and then copy over System 7.5.5 - the last version I can freely distribute. I worked great until one Mac wouldn't boot with the drive attached. Removing the internal hard drive, I discovered it was set to SCSI ID 1, removed the jumper, and all was good. As long as the external SCSI device doesn't have the same ID as an internal device, you Mac should be able to boot. Suggest you check that out first. Dan Knight, Low End Mac On Mar 31, 3:05 pm, zeroid <[email protected]> wrote: > Hello: > > A friend's IIci (running OS 7.1) freezes whenever either a SCSI > external hard drive or zip drive is connected. If I recall correctly, > this occurs even when the SCSI device is off--merely connecting the > cable seems to have a bad influence. Both of the SCSI devices work > fine with a beige G3 running OS 8.6. > > I'm not well versed in the voodoo which is SCSI. The external hard > drive has a selector for setting the device number (how do I find the > SCSI number of the IIci itself?) but the zip drive doesn't. > > The ultimate aim is to clone the possibly failing internal hard > drive's contents. The IIci has a 200MB hard drive so copying to > floppies is impractical. Is it feasible to swap the IIci's hard drive > into the external case and then copy it onto the beige G3? What type > of connector & pin number does the IIci hard drive have? > > Thank you for any help. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
