[null, {"document_url": "https://symbolics.lisp.engineer/scsi-50-to-68-pin-adapters/", "unformatted_src": "/content/images/2016/06/Monoprice50-68_31M-v0X49TL.jpg", "src": "https://symbolics.lisp.engineer/content/images/2016/06/Monoprice50-68_31M-v0X49TL.jpg", "formatted_filename": "Monoprice M v X TL", "alt_text": "Monoprice adapter, 68-pin side"}, {"document_url": "https://symbolics.lisp.engineer/scsi-50-to-68-pin-adapters/", "unformatted_src": "/content/images/2016/06/Monoprice50-68_31pNGjYc-PL.jpg", "src": "https://symbolics.lisp.engineer/content/images/2016/06/Monoprice50-68_31pNGjYc-PL.jpg", "formatted_filename": "Monoprice pNGjYc PL", "alt_text": "Monoprice adapter, 50-pin side"}, null]


I bought several of these from Amazon, made by Monoprice. (Pictures below.) My SCSI chain in the XL1201 was then:

SCSI on Backplane -> 50-68 adapter -> cable -> ST318451LW -> cable (same cable) -> terminator

The terminator is built into the cable and is labeled "Foxconn Ultra 320."

This was able to boot my SCSI2SD v5 card (with another 50-68 pin adapter) but not the ST318451LW.

I pulled out the 50-to-68 pin adapter from my MacIvory's CD-ROM (which DKS converted to 68-pin as well) and put that into the backplane SCSI port and voila - the ST318451LW would boot. Moreover, I could add the SCSI2SD to the chain and both would be accessible.

So, it seems that not all 50-to-68 pin SCSI adapters are created equally. (Either that or my broken SCSI Pin 1 is incompatible with the adapter.) XL1201 and SCSI2SD v5 128GB


This is a Symbolics Model PE36-PCONS, Part No 365404 Rev C console. My serial number is 21811. ("There are…