dcopy

PURPOSE

     Copies file systems for the best access time.

SYNOPSIS
     dcopy [ -d -v -s[cyl:skip] ] [ -a num ] [ -f fsize ] [ -f fsize:isize ]
           oldfs newfs

DESCRIPTION

     Warning:   oldfs and  newfs must  not refer  to the  same
     minidisk.  Doing so will destroy the old file system.

     The dcopy command copies an existing file system oldfs to
     a new file system newfs,  appropriately sized to hold the
     reorganized results.   For best results, oldfs  should be
     the raw device and newfs  should be the block device.  If
     oldfs or newfs is a file system name, dcopy uses the cor-
     responding block  device given in  /etc/filesystems.  You
     should run dcopy  on unmounted file systems  (in the case
     of the root file system, copy to a new minidisk).

     If you do not specify  any flags, dcopy copies files from
     oldfs, compressing directories by removing vacant entries
     and spacing consecutive  blocks in a file  by the optimal
     rotational gap.

     The dcopy command makes newfs identical to oldfs and pre-
     serves the pack  and volume labels.  Thus,  to compress a
     file system without  moving it, use the  dcopy command to
     copy the file  to another file system and  the dd command
     to copy the file back.

     The dcopy command catches  INTERRUPT and QUIT signals and
     reports  on its  progress.   To end  dcopy,  send a  Quit
     signal (Ctrl-V) and dcopy  no longer catches INTERRUPT or
     QUIT.   dcopy also  attempts to  modify its  command line
     arguments so that its progress  can be monitored with the
     ps command.

FLAGS

     -anum            Places files not  accessed in the speci-
                      fied  number  of  days  after  the  free
                      blocks of  the destination  file system.
                      The default  value of num is  7.  If you
                      do not specify num, no files are moved.

     -d               Leaves the order of directory entries as
                      is.  If  you do  not specify  this flag,
                      dcopy moves subdirectories to the begin-
                      ning of directories.
     -ffsize[:isize]  Specifies  the  file system  and  i-node
                      list sizes  (in blocks).  If  not speci-
                      fied, the value from oldfs is used.
     -scyl:skip       Supplies device information for creating
                      the  best organization  of  blocks in  a
                      file, where  cyl is the number  of block
                      per cylinder  and skip is the  number of
                      blocks to skip.
     -v               Reports  how many  files were  processed
                      and how  big the source  and destination
                      free lists are.

RELATED INFORMATION

     The  following  commands:   "fsck, dfsck,"   "mkfs,"  and
     "ps."