L DISKBLOCK, UTILITIES, Editor for raw LBNs and VBNs on ODS2 and Foreign disks  J     DISKBLOCK is a low level disk block editing tool which can be used to =     read, modify and write LBNs on a disk or VBN's in a file.   G     Diskblock is able to read and write Foreign and ODS2 mounted disks, G     ignoring all locking requirements.  It can be used to repair disks  I     which have been made unreadable by hardware and/or software errors.   H     It can also copy files from disks that can only be mounted /FOREIGN.  F     There are commands to SAVE and RESTORE blocks so that you can keepI     a copy of parts of a disk and undo changes if they do not work as you      expect.   J     There is a CHECKSUM command to enable you to recalculate the checksums*     for ODS2 file headers and home blocks.  A     There is a DIRECTORY command which will find the header for a /     file (even if the disk is mounted /foreign)   I     There is a COPY command which will enable you to treat any block on a M     disk as a file header and copy the LBNs described by its mapping pointers 9     to a new file (even if the disk is mounted /foreign).      D     There is a SEARCH command which will search the entire disk/fileG     (or any range of blocks) for a particular string or integer or file N     header.  This search usually runs at the spiral transfer rate of the disk.  =     Because of its potential to corrupt disks you should only D     use Diskblock in extreme desperation or on a disk which you have     backed up.     /     You need LOG_IO privilege to run DISKBLOCK.   E     Type HELP OVERVIEW or HELP EXAMPLES at the DISKBLOCK> prompt for       more information. 