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    Command:

    fsfreeze

    
    
    
    

    SYNOPSIS

           fsfreeze -f mountpoint
    
           fsfreeze -u mountpoint
    
    
    

    DESCRIPTION

           fsfreeze suspends and resumes access to an filesystem
    
           fsfreeze halts new access to the filesystem and creates a stable  image
           on  disk.   fsfreeze  is intended to be used with hardware RAID devices
           that support the creation of snapshots.
    
           fsfreeze is unncessary for  device-mapper  devices.  The  device-mapper
           (and  LVM)  automatically freezes filesystem on the device when a snap-
           shot creation is requested.  For more details see  the  dmsetup(8)  man
           page.
    
           The  mount-point  argument  is  the pathname of the directory where the
           filesystem is mounted.  The filesystem must be  mounted  to  be  frozen
           (see mount(8)).
    
    
    

    OPTIONS

           -h, --help
                  Print help and exit.
    
           -f, --freeze
                  This  option  requests  the  specified a filesystem to be frozen
                  from new modifications.  When  this  is  selected,  all  ongoing
                  transactions  in  the  filesystem  are  allowed to complete, new
                  write system calls are halted,  other  calls  which  modify  the
                  filesystem  are  halted,  and  all dirty data, metadata, and log
                  information are written to  disk.   Any  process  attempting  to
                  write  to  the  frozen  filesystem  will  block  waiting for the
                  filesystem to be unfrozen.
    
                  Note that even after freezing, the on-disk filesystem  can  con-
                  tain  information  on  files  that  are  still in the process of
                  unlinking.  These files will not be unlinked until the  filesys-
                  tem is unfrozen or a clean mount of the snapshot is complete.
    
           -u, --unfreeze
                  This option is used to un-freeze the filesystem and allow opera-
                  tions to  continue.   Any  filesystem  modifications  that  were
                  blocked by the freeze are unblocked and allowed to complete.
    
    
    

    AUTHOR

           Written by Hajime Taira.
    
    
    

    NOTES

           This man page based on xfs_freeze.  One of -f or -u must be supplied to
    
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