Alternate boot disk

[Martin Serrer]

Hello again.

  First of all I would like to thank all who answered my questions re: Pointers
and pointers to pointers etc... I think it's all clear now. Thank-you, Dan
Karron, Scott Townsend, Dave Anderson, Chris Schoeneman, Jit Keong Tan and Gary
Moss. :-)

  And now a NEW question.

 I just received a new disk (380 MByte) for my 4D50/GT and would like to install
the newest version of unix on this disk leaving the old disk (170 MByte) intact.
 The 170 was configured as SCSI id=1.
 I would like to configure things now so that the 380 is id=1 and the 170 as
id=2 and have the ability to boot from either disk.
 So off I went moving SCSI id jumpers and changing the PROM 'bootfile' and
'root' env variables. but when I try to boot the 170 at its new address I get a
message...
  mount: giving up on:
     /usr
  followed by all the nasties one would expect if /usr wasn't available.

  Am I once again missing the obvious or is there a real problem?
Thanks in advance for any/all reply's

+-----------------------------------------------------------------------------+
| Martin Serrer                           Systems Lab., Bldg. M2, Montreal Rd.|
| 613-993-9442                            National Research Council of Canada,|
| serrer at syslab.nrc.ca                    Ottawa,  Ontario,  Canada  K1A-0R6  |
+------------------- Software Rusts, Rust never Sleeps -----------------------+