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SGI admin Frequently Asked Questions (FAQ)
Section - -20- How can I boot from a non-default disk?

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  Says Justin Mason <jmason@iona.ie>: If your disk is SCSI ID 4, do

    boot -f dksc(0,4,8)sash dksc(0,4,0)unix root=dks0d4s0

  or

    setenv bootfile dksc(0,4,8)sash
    setenv path dksc(0,4,8)
    setenv root dks0d4s0		# This is the tricky part 
    auto

  from the PROM. The first method works once, so that subsequent
  reboots use SCSI ID 1, and the second method sets the PROM to boot
  from ID 4 every time (until you reset the PROM variables).

  Dave Olson <olson@sgi.com> adds: "If you have a separate / and /usr,
  you'll probably want to add 'initstate=s' at least the first time, or
  the usr partition on your normal root will be mounted.  Boot in single
  user, then do 'cd /dev; ./MAKEDEV disklinks; multi'.  After this, you
  won't need 'initstate=s' since the link will now be to the usr
  partition on the alternate boot disk.

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Top Document: SGI admin Frequently Asked Questions (FAQ)
Previous Document: -19- How can I boot directly into single-user mode?
Next Document: -21- How can I boot my machine using a server on the other side of a router?

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Last Update March 27 2014 @ 02:12 PM