edvtoc(1M)                UNIX System V(Base System)                 edvtoc(1M)


      edvtoc -  VTOC (Volume Table of Contents) editing utility

SYNOPSIS
      edvtoc -f vtoc-file raw-device

DESCRIPTION
      The edvtoc command allows you to edit the contents of the VTOC (Volume
      Table Of Contents).  The required procedure for editing the VTOC includes
      three steps.  First, run prtvtoc [see prtvtoc(1M)] using the -f option.
      Second, edit the file created by prtvtoc to reflect the needed changes to
      the VTOC.  Third, run edvtoc using the edited file.

      edvtoc provides four functions; reading/interpreting the vtoc-file,
      limited validity checking of the new VTOC, displaying the new VTOC, and
      writing the VTOC to the disk if the user requests it.

      When editing the VTOC, the following entries are the valid slice tags and
      slice permission flags.
             Slice Tags
             __________________________________________________________
             #define VBOOT     0x01    /* Boot slice */
             #define VROOT     0x02    /* Root filesystem */
             #define VSWAP     0x03    /* Swap filesystem */
             #define VUSR      0x04    /* Usr filesystem */
             #define VBACKUP   0x05    /* full disk */
             #define VALTS     0x06    /* alternate sector space */
             #define VOTHER    0x07    /* non-unix space */
             #define VALTTRK   0x08    /* alternate track space */
             #define VSTAND    0x09    /* Stand slice */
             #define VVAR      0x0a    /* Var slice */
             #define VHOME     0x0b    /* Home slice */
             #define VDUMP     0x0c    /* dump slice */

             Slice Permission Flags
             __________________________________________________________
             #define VUNMNT    0x01    /* Unmountable partition */
             #define VRONLY    0x10    /* Read only */
             #define VVALID    0x200   /* Partition is valid to use */
      The start and size value are in absolute sector numbers where the first
      sector on the drive is 0 (which is reserved for the partition table).
      Slices should start and end on a cylinder boundary if possible.  The
      head, cylinder and sectors/track information provided by prtvtoc -p will
      assist in the calculations.  Slices should not overlap (slice 0 is the
      exception, it describes the entire UNIX partition).

OPTIONS
      -f vtoc-file   writes the current contents of the VTOC into the vtoc-file
                     in a codensed format.  The format of the file is slice
                     number, slice tag value, slice flag value, slice start
                     sector, slice size (in sectors).  The purpose of this file
                     is to be input for the edvtoc command.



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edvtoc(1M)                UNIX System V(Base System)                 edvtoc(1M)


      raw-device     raw-device is the character special device for the disk
                     drive to be accessed.  It must be the slice 0 device to
                     represent the entire device (e.g., /dev/rdsk/0s0 or
                     /dev/rdsk/c0t0d0s0).

FILES
      /dev/dsk/0s0
      /dev/rdsk/1s0
      /dev/rdsk/c?t?d?s0

SEE ALSO
      prtvtoc(1M)










































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