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    Command:

    xfs_admin

    
    
    

    SYNOPSIS

           xfs_admin [ -eflpu ] [ -c 0|1 ] [ -L label ] [ -U uuid ] device
    
    
    

    DESCRIPTION

           xfs_admin  uses the xfs_db(8) command to modify various parameters of a
           filesystem.
    
           Devices that are  mounted  cannot  be  modified.   Administrators  must
           unmount  filesystems  before xfs_admin or xfs_db(8) can convert parame-
           ters.  A number of parameters of a mounted filesystem can  be  examined
           and modified using the xfs_growfs(8) command.
    
    
    

    OPTIONS

           -e     Enables  unwritten  extent support on a filesystem that does not
                  already have this enabled (for legacy filesystems, it  can't  be
                  disabled anymore at mkfs time).
    
           -f     Specifies that the filesystem image to be processed is stored in
                  a regular file at device (see the mkfs.xfs -d file option).
    
           -j     Enables version 2 log format (journal format  supporting  larger
                  log buffers).
    
           -l     Print the current filesystem label.
    
           -p     Enable 32bit project identifier support (PROJID32BIT feature).
    
           -u     Print  the  current  filesystem UUID (Universally Unique IDenti-
                  fier).
    
           -c 0|1 Enable (1) or disable (0) lazy-counters in the filesystem.  This
                  operation  may  take quite a bit of time on large filesystems as
                  the entire filesystem needs to be scanned when  this  option  is
                  changed.
    
                  With  lazy-counters  enabled,  the superblock is not modified or
                  logged on every change of the  free-space  and  inode  counters.
                  Instead,  enough  information  is  kept  in  other  parts of the
                  filesystem to be able to maintain  the  counter  values  without
                  needing  to  keep them in the superblock. This gives significant
                  improvements in performance on some configurations and  metadata
                  intensive workloads.
    
           -L label
                  Set the filesystem label to label.  XFS filesystem labels can be
                  at most 12 characters long; if label is longer than  12  charac-
                  ters,  xfs_admin  will  truncate it and print a warning message.
                  The filesystem label can be cleared using the special "--" value
                  for label.
    
           -U uuid
                  Set  the  UUID  of  the filesystem to uuid.  A sample UUID looks
    
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