aad@stepstone.com (Anthony A. Datri) (03/14/89)
I've got a Mac-type SCSI drive (Apple 80SC) that I'd like to hook to a 4/110. The 4/110 has a shoebox taken from a 3/50. Here's the process for doing this as I see it. Please let me know if I'm wrong somewhere: The shoebox is default, so that means SCSI id 0. The Sun SCSI controller is id 7, and devices chain in descending order. The Mac drive uses a "centronics" style connector, so I'll need one special cable to put it at the end of the bus, and two if I put in in the middle. To save on cables, putting the drive at the end of the bus is preferable, so I'll have to change the SCSI id of the Sun drive (from which it boots) to 1, and set the Mac drive to id 0. Cable the Sun to the Sun shoebox, the Sun shoebox to the Mac drive, terminating the Mac drive by the inline terminator given with the mac drive. I'll have to change the EEPROM of the Sun to tell it to boot from unit 1 instead of unit 0. I don't think I'll have to change the SunOS kernel to reflect this. Since the sw (SCSI Weird) controller in the 4/110 has a non-standard pin 26, will I have to remove pin 26 from the Sun shoebox <----> Mac drive cable? Anthony A. Datri @SysAdmin(Stepstone Corporation) aad@stepstone.com stpstn!aad