fsba(1M)                                                           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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