Hi. I’ve got a friend with a problem - he lost the DIP switch settings on his CMS SD80 SCSI external hard drive so it will no longer work with his Mac LCIII like it used to. He can’t locate the manual showing the correct configuration for the LCIII. Does anyone know what they are? Any help would be appreciated.
Would that be the SCSI ID setting? Any SCSI ID from 1 to 6 can normally be used, as long as another device does not have the same ID. ID 7 would be reserved for the Macintosh computer itself, ID 0 (usually) for the internal hard drive. Could the information for a similar drive at http://www.artisantg.com/TestMeasurement/65450-2/CMS_Enhancements_SD60_External_ SCSI_Hard_Drive (found through a random web search) possibly be of some interest?
Thanks for your reply. I'm acting as messenger since my friend is not on this forum. He said:
I don’t think so – some drives have an ID setting window for this. This one does not have that, it only has the 8 DIP switches.
Yes, other SCSI hard drive enclosures do usually have a push-button or rotary switch with an ID window.
I am not familiar with this enclosure/drive, but the manual for similar drives (link above) appears to indicate that DIP switches are responsible for ID settings here.
My friend really appreciates your help, but pointed out that since the SCSI ID is any number from 1 to 6, that would only require 3 bits (and therefore 3 switches) to set. Since there are 8 switches (256 possible combinations), there must be more going on with the configuration of the switches.
Here is a photo of the unit showing the DIP switches.
Did your friend study the ID charts in the manual under the link above? For example, ID 6 appears to involve only the DIP switches 1(up), 2(up), 3(down) and 8(up), whereas DIP switches 4, 5, 6 and 7 are marked N/A. Sorry, but I do not know whether these charts are correct also for the enclosure/drive in question. Nor do I know what the purpose is for the four unused DIP switches (if at all connected).
I just sent him your reply. I'm not sure the extent to which he has studied the manual, I'll check. If he has any success I'll post back.
Thank you for spending so much time with this. I have marked the problem solved.🙂
You're welcome. Good luck! If necessary, do not hesitate to post other questions about the Macintosh LC III and SCSI devices. Also, your friend could possibly be interested in a utility like Mt. Everything (http://www.overnet.de/hhp/mte/).
CMS SCSI External Hard Drive DIP configuration
