fsdb_ufs — UFS File-System Debugger
/usr/sbin/fsdb -F ufs [generic-options][specific-options] special
The fsdb_ufs command is an interactive tool that you can use to patch up a damaged UFS file system. It has conversions to translate block and i-numbers into their corresponding disk addresses. Also included are mnemonic offsets to access different parts of an inode. These features greatly simplify the process of correcting control block entries or descending the file system tree.
fsdb contains several error-checking routines to verify inode and block addresses. You can disable these routines if necessary by invoking fsdb with the -o option or by the use of the o command.
fsdb reads a block at a time and, therefore, works ...