fsba(1M)          MISC. REFERENCE MANUAL PAGES           fsba(1M)



NAME
     fsba - file system block analyzer

SYNOPSIS
     /usr/sbin/fsba  [  -b  target_block_size  ]  file-system1  [
     file-system2 ... ]

DESCRIPTION
     The fsba command determines the disk space required to store
     the  data  from an existing file system in a new file system
     with the specified logical  block  size.   Each  file-system
     listed on the command line refers to an existing file system
     and   should   be   specified   by   device   name    (e.g.,
     /dev/rdsk/c1d0s2).

     The target_block_size specifies the logical  block  size  in
     bytes  of the new file system.  Valid target block sizes are
     512, 1024, and 2048.  Default target block size is 1024.   A
     block  size  of 2048 is supported only if the 2K file system
     package is installed.

     The fsba command prints information about how many  512-byte
     disk  sectors  are  allocated  to  store the data in the old
     (existing) file system and how many  would  be  required  to
     store  the same data in a new file system with the specified
     logical block size.  It also prints the number of  allocated
     and free i-nodes for the existing file system.

     If the number of free sectors listed for the new file system
     is  negative,  the  data will not fit in the new file system
     unless the new file system is larger than the existing  file
     system.   The new file system must be made at least as large
     as the number of sectors listed by fsba as allocated for the
     new file system.  The maximum size of the new file system is
     limited by the size of the disk partition used for  the  new
     file system.

     Note that it is possible to specify a target_block_size that
     is  smaller than the logical block size of the existing file
     system.  In this case the  new  file  system  would  require
     fewer sectors to store the data.

SEE ALSO
     mkfs(1M), prtvtoc(1M).











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