Recovering from primary boot disk failure:
If the primary root disk fails, the system will continue to run from the
secondary boot disk. There will be SCSI errors on the console, about the disk
failure.
"Primary root disk can be replaced online without bringing down the system"
Note: It is not necessary to remove the failed disk using the cfgadm or devfsadm
commands. If a new disk is installed in place of the failed disk, just
execute the devfsadm command, so that the OS can recognize the new disk.
Then the "format" command will show the new disk. If the new installed
disk installed has no fdisk partition, then create the fdisk partition
from the format program, so that the new disk can be used for mirroring.
