Wednesday, August 17, 2005

Booting off an external CD-ROM

Booting off an external CD-ROMooting off an external CD-ROM
To boot off an external CD-ROM, determine the device path with
probe-scsi-all from the Open Boot PROM (OBP or "ok" prompt). Note: you
may want to temporarily perform a setenv auto-boot? false and
reset-all if OBP warns you that executing probe-scsi-all could hang
your system.

Relevant probe-scsi-all output:

/sbus@b,0/SUNW,fas@3,8800000
Target 3
Unit 0 Removable Read Only device PLEXTOR CD-R PX-R820T 1.0811/21/00
16:00

In this example, the SCSI target ID ("Target") is 3, and the physical
path to the external CD-ROM is /sbus@b,0/SUNW,fas@3,8800000. To boot a
Solaris Operating Environment CD using this external CD-ROM, you would
issue the command:

{e} ok boot /sbus@b,0/SUNW,fas@3,8800000/sd@3,0:f

In the command above, sd@3,0 refers to the SCSI target (3) and LUN/Unit (0).

Note: when connecting an external CD-ROM device, make sure that the
CD-ROM drive and system are both powered off. Connect the CD-ROM, and
power on the CD-ROM and then the system. Failure to follow this
procedure may result in the following errors:

{e} ok boot /sbus@b,0/SUNW,fas@3,8800000/sd@3,0:f
Boot device: /sbus@b,0/SUNW,fas@3,8800000/sd@3,0:f File and args:
Bad magic number in disk label
Can't open disk label package

Can't open boot device

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