Sun Solaris (OS) Question:
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How to restore a corrupted file system or trouble shoot bad super blocks for a FS c0t2d0s5
Answer:
get into single user mode from ok prompt by using the command below.
boot -s
use the newfs command to check the number of back ups for the superblock used.
use newfs -N to display the value for /dev/dsk/c1t1d0s0 as below.
newfs -N /dev/dsk/c1t1d0s0
use fsck command to fix the superblocks as below
fsck -F ufs -o b=75680 /dev/rdsk/c1t1d0s0
Now the blocks are replaced get to multiuser mode using init 3
server should boot fine.
boot -s
use the newfs command to check the number of back ups for the superblock used.
use newfs -N to display the value for /dev/dsk/c1t1d0s0 as below.
newfs -N /dev/dsk/c1t1d0s0
use fsck command to fix the superblocks as below
fsck -F ufs -o b=75680 /dev/rdsk/c1t1d0s0
Now the blocks are replaced get to multiuser mode using init 3
server should boot fine.
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