On 2015-02-11 20:27, Cory Smelosky wrote: Coming today: Images of SC-40 boot drives assuming they weren't 36-bit low-level I don't think they are, but Peter Lothberg should have all the details, since he already have an SC40 on HECnet... The SCSI drive that is used for boot is formatted with 2304 byte sectors, and has a T20 file system. The "FE are" is not used. (one sector=1 pdp10 page) They can be 576 byte to. Looks like I'm gonna need a low-level SCSI driver patch to copy 'em then, no? What exactly are we trying to do here? What do we have and what kind of result are we expecting?! I also assumed it was a T20 system, there is also T10 stuff. -P