fixdisk General Query

[Black Hole]

This is just curiosity:

fixdisk can throw up "multiply claimed block" errors. But there is facility in the file system to create "hard links", whereby a file can appear to be in multiple places in the file system but without actually duplicating the file. Is that not a deliberate multiply claimed block? Would fixdisk distinguish?

 

[/df]

That's a different level. The same file can be indexed in several directories, but each block of the file is uniquely assigned to the file.

For Extn filesystems, see, eg, https://en.wikipedia.org/wiki/Inode.