🚀 go-pugleaf

> I have an Emulex MU2110402 SCSI=>ESDI bridge, with which I can run ESDI 
> devices on a SCSI bus.
> --- i assume you mean an MD21....
> Does anyone have any documentation on these or know where I could get 
> some?  The problem is that the SCSI controller on a sun4c or an 
> adaptec/ncr on a PC does not even notice it on the bus!
> 
> One thing that is noticeable is that, out of the red and the green LED's on 
> the Emulex board, the green one continuously flashes?  Can SCSI id be set 

---- green flashing continuously means self test ok.

> on these?  There seem to be some jumpers and certainly a block of 
> dipswitches but no docs!

sw1-1 scsi a0
   -2 scsi a1
   -3 scsi a2
   -4 off = unused
   -5 off = 512 byte blocks
   -6 off = motor on
   -7 off = enable error reporting
   -8 off = disable parity
> 
> I also seem to remember that it supported two ESDI drives as multiple 
> LUN's on a common id. The board came from a shoebox sun enclosure.

--- it does, with 2 drives you see sdn and sdn+1, e.g. sd4 and sd5
> 
> 
i use these on 3/60's, usually with scsi address 0 = sd0.

on a 4c i think you may have to remap scsi addresses, 
i.e. scsi 3 = sd0 for external drives? 
you need more help than i can give there.
good luck.