In this example, you would determine the path to the alternate root device by using the ls -l command on the slice that is being attached as the second submirror to the root (/) mirror.
# ls -l /dev/rdsk/c1t3d0s0 lrwxrwxrwx 1 root root 55 Mar 5 12:54 /dev/rdsk/c1t3d0s0 -> \ ../../devices/sbus@1,f8000000/esp@1,200000/sd@3,0:a |
Here you would record the string that follows the /devices directory: /sbus@1,f8000000/esp@1,200000/sd@3,0:a.
On some newer Sun hardware, you will be required to change the /devicesdirectory name from sd@ to disk@.
DiskSuite users who are using a system with Open Boot Prom can use the OpenBoot nvalias command to define a "backup root" devalias for the secondary root mirror. For example:
ok nvalias backup_root /sbus@1,f8000000/esp@1,200000/sd@3,0:a |
In the event of primary root disk failure, you then would only enter:
ok boot backup_root |