mark@comp.vuw.ac.nz (Mark Davies) (06/27/90)
I have now successfully daisy-chained my shoebox off the 3/80 and external storage module (Have these things got a better name?). Thanks to Chuck Purcell <cjp@ssesco.com> jpolcari@cat.Prime.COM Bruce Samuelson <bruce%utafll%texbell%cs.utexas.edu> Morry Katz <katz@rpal.com> Greg Onufer <daver!cheers!greg@uunet.uu.net> for their useful responses. To summarise what needed to be done. 1) Change the SCSI addresses on the boards. SunOS expects the following mapping between devices and SCSI addresses SCSI addr unit number sd0 0 0 first disk in first external module sd1 0 1 second disk " " " sd2 1 0 first disk in second external module sd3 1 1 second disk " " " st0 4 0 cartridge in first external module st1 5 0 " second " " so to hang the shoebox off the 3/80 I needed to change the address of its disk to 1 and the the tape to 5 (or some other free pair) For the emulex controller (on the tape) there is a DIP switch labelled SW1 On the DIP Switch: Switch 1: SCSI Addr Bit 0 (2^0) Switch 2: SCSI Addr Bit 1 Switch 3: SCSI Addr Bit 2 (2^2) For the adaptec (disk controller) there is a row of jumpers near the centre of the board: A-B: SCSI Addr Bit 0 (2^0) C-D: SCSI Addr Bit 1 E-F: SCSI Addr Bit 2 (2^2) 1a) Several people mentioned that the SCSI bus would be terminated in the shoebox and gave the following instructions to undo this: Remove two yellow resistors from the disk controller. The resistors are labelled U22 and U35. Also remove a white resistor which is on a card next to the disk drive. The resistor is between two blue cable connectors right near the front of the disk drive, i.e. near the open end of the case. I did not try this as the existing external storage module had an external SCSI terminator so I simply removed this and added the shoebox as the final link in the chain. 2) Configure your kernel add lines similar to these to your config and rebuild. tape st1 at sm0 drive 40 flags 1 disk sd2 at sm0 drive 8 flags 0 My kernel already had them configured so I skipped this step. 3) Make the devices cd /dev ./MAKEDEV sd2 st1 and thats it.