[Info-vax] Request description of UFS for VMS person

[JF Mezei]

Bob Eager wrote:

> As you say, unlink just removes a directory entry; all directory entries
> are 'equal', so when the last one goes, the use count in the inode drops
> to zero. At that point, the inode is cleared and the file blocks 
> returned to free space.
> 
> On MS-DOS, the first byte of the directory entry was set to a special 
> 'deleted' value, and file blocks were marked as free. Basic, but 
> sufficient.


Does this mean that "undelete" is not possible on Unix file systems
because its logical equivalent to the entry in indexf is actually wiped
out ?

With VMS and DOS, it was possible to undelete files because entries were
just flagged as available and remained until used by another file.