Bad super block: Magic number wrong

beginningDBA · #1 (**permalink**) 07-14-2009

Whenever i run,
# fsck -F ufs /dev/dsk/c0t0d0s7

The following error prompt out:-

** /dev/dsk/c0t0d0s7
BAD SUPER BLOCK: MAGIC NUMBER WRONG
USE AN ALTERNATE SUPER-BLOCK TO SUPPLY NEEDED INFORMATION;
eg. fsck [-F ufs] -o b=# [special ...]
where # is the alternate super block. SEE fsck_ufs(1M).

-------------------------------------------------------
Question:
1. Is the error means that there is a bad sector somewhere?
-------------------------------------------------------

# fsck -F ufs -o b=32 /dev/dsk/c0t0d0s7
Alternate super block location: 32.
** /dev/dsk/c0t0d0s7
BAD SUPER BLOCK: MAGIC NUMBER WRONG
USE AN ALTERNATE SUPER-BLOCK TO SUPPLY NEEDED INFORMATION;
eg. fsck [-F ufs] -o b=# [special ...]
where # is the alternate super block. SEE fsck_ufs(1M).

-------------------------------------------------------
Question:
1. I tried a few different numbers i get from running,
# newfs -Nv /dev/dsk/c0t0d0s7
in b=??, still the error appears, what should i do?
-------------------------------------------------------

Anything i have done incorrectly, please do point out.

Thanks in advance for reading or replying.

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