Using the subcommands of READ

The UPDATE keyword on the READ subcommand allows you to use the subcommands to update the block. The subcommands are:

• LIST: Displays portions of the block in hexadecimal.
• FORMAT: Produces a formatted listing of the contents of an index block.
• FIND: Locates the offset of data in the block.
• REP: Replaces data in the block (valid only with the UPDATE command).
• DISPLAY: Displays the entries of an index block one at a time (it has several subcommands that are associated with it).
• REREAD: Overlays the new block in the work area with the old block (valid only with the UPDATE keyword).
• END: Terminates the READ function.