Solaris box unable to boot due to corrupted /etc/vfstab file

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The following procedure useful to get the the system to normal state by fixing the corrupted /etc/vfstab file in Solaris


1)Insert the CD/DVD.

2)boot the system from CD-ROM
ok> boot cdrom -s
Note: If the system is at LOM, issue the command 'break' to get in to ok prompt

3)Check for file system layout after booting from CD
# df -k
Filesystem            kbytes    used   avail capacity  Mounted on
/pci@1f,0/pci@1,1/ide@d/cdrom@0,0:b
                      512591  485732       0   100%    /
swap                  967336     656  966680     1%    /tmp
proc                       0       0       0     0%    /proc
mnttab                     0       0       0     0%    /etc/mnttab
/tmp/devices          967336     656  966680     1%    /devices
/tmp/dev              967336     656  966680     1%    /dev
/devices/pci@1f,0/pci@1,1/ide@d/sd@0,0:a
                     2480062 2480062       0   100%    /cdrom
/cdrom/Solaris_9/Tools/Boot/usr
                     2480062 2480062       0   100%    /usr
fd                         0       0       0     0%    /dev/fd

4)Go to the path /devices, from where we can find the physical devices
#cd /devices

5)ls -ld /dev/dsk/c1t0d0s0
lrwxrwxrwx   1 root     root          44 Jul  9 03:27 /dev/dsk/c1t0d0s0 -> ../../devices/pci@1f,0/pci@1/scsi@8/sd@0,0:a

6)mount it on /mnt
# mount /dev/dsk/c1t0d0s0 /mnt

7)edit vfstab and do the necessary changes.
#vi /mnt/etc/vfstab

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