Booting Issues in Solaris

Booting Problems in Solaris 

1.Booting in single user mode and mounting root hard disk.

Most important step in  diagnosing the booting problems is booting the system in single user mode and examining the hard disk for possible errors & work out the corrective measure. Single user mode can be achieved by any of the following methods :-

ok> boot -s           ;from root disk

ok> boot net -s       ;from network

ok>boot cdrom -s      ;from cdrom

Rebooting with command: cdrom -s 

Configuring the /devices directory

Configuring the /dev directory |

INIT: SINGLE USER MODE

#

# fsck /dev/rdsk/c0t3d0s0

# mount /dev/dsk/c0t3d0s0 /mnt

Perform the required operation on mounted disk , now accessible through /mnt ,& unmount the hard disk after you are done ;

# umount /mnt

# reboot

2.Making boot device alias

In case system can not boot from primary disk  and it is needed to make another boot disk to access the data , nvalias command is used .

nvalias command makes the device alias  and assigns an alternate name to a physical disk. Physical address of target disk is required  which can be had by show-disk command on ok>.

ok> nvalias disk7 /iommu@f,e0000000/sbus@f,e0001000/dma@3,81000/esp@3,80000/sd2,0

The new aliased disk can be named as boot disk or can be used for booting by refering its name .

ok> setenv boot-device disk7

ok>reset

or

ok> boot disk7