How can I determine which disk is the boot disk? Updated: 01/03/02


There are at least two ways to do this:

o Use "lvlnboot -v" (must be root); this command also reports additional
information on volume groups and logical volumes:

# lvlnboot -v `vgdisplay | grep "VG Name" | awk '{print $3}'`
...
/dev/dsk/c0t5d0 (8/4.5.0) -- Boot Disk
...

o Use setboot. This command also reports the alternate bootpath, as well
as whether Autoboot and Autosearch are enabled. However, it does not
print the disk device names as lvlnboot does.

$ setboot
Primary bootpath : 8/4.5.0
Alternate bootpath : 8/4.10.0

Autoboot is ON (enabled)
Autosearch is OFF (disabled)

To determine which disk the currently running kernel was booted from, use
adb as follows (must be root):

# KERNEL=/stand/vmunix # set this var to the currently running kernel
# echo 'boot_string/S' | adb $KERNEL /dev/mem | grep /
boot_string: disc(8/4.5.0;0)/stand/vmunix

On 11.x, the path of the currently running kernel can be obtained using
the kmpath command (see subject 8.2.4).



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