metasync

 

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 Maintenance Commands                                 metasync(1M)
 
 
 


NAME
      metasync - handle metadevice resync during reboot
 


SYNOPSIS
      metasync -h
      metasync [ -s setname ] [ buffer_size ] metadevice
      metasync [ -s setname ] -r [ buffer_size ]
 
 


DESCRIPTION
      The metasync command starts a resync operation on the speci-
      fied metadevice. All components that need to be resynced are
      resynced. If the system crashes during a  RAID5  initializa-
      tion,  or during a RAID5 resync, either an initialization or
      resync restarts when the system reboots.
 
      Applications are free to access a  metadevice  at  the  same
      time  that it is being resynced by metasync.  Also, metasync
      performs the copy operations from inside the  kernel,  which
      makes the utility more efficient.
 
      Use the -r option in boot scripts  to  resync  all  possible
      submirrors.
 
 


OPTIONS
      -h   Displays usage message.
 
      -r   Specifies that  the  metasync  command  handle  special
           resync  requirements  during a system reboot.  metasync
           -r should only be  invoked  from  /etc/init.d/lvm.sync.
           The  metasync  command  only  resyncs those metadevices
           that need to be resynced.  metasync schedules  all  the
           mirror resyncs according to their pass numbers.
 
      -s setname
           Specifies the name of the  diskset  on  which  metasync
           will  work.  Using the -s option will cause the command
           to  perform  its  administrative  function  within  the
           specified  diskset.   Without  this option, the command
           will perform its function on local metadevices.
 
      buffer_size
           Specifies the size (number of 512-byte disk blocks)  of
           the  internal  copy  buffer  for the mirror resync. The
           size defaults to 63 512-byte disk blocks (31.5 Kbytes).
           It can be no more than 126 blocks.
 
 


ATTRIBUTES
      See attributes(5) for descriptions of the  following  attribute:   box; cbp-1 | cbp-1 l | l .  ATTRIBUTE TYPE ATTRIBUTE
 
      VALUE = Availability   SUNWmdu
 
 


SEE ALSO
      metaclear(1M),   metadb(1M),   metadetach(1M),   metahs(1M),
      metainit(1M),        metaoffline(1M),        metaonline(1M),
      metaparam(1M), metareplace(1M),  metaroot(1M),  metaset(1M),
      metastat(1M), metattach(1M), md.tab(4), md.cf(4), mddb.cf(4)
 
      Solstice DiskSuite User's Guide, Solstice  DiskSuite  Refer-
      ence
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 SunOS 5.8            Last change: 1 Oct 1999                    2
 
 
 

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