NEWFS.FFS(1M-SysV)  RISC/os Reference Manual   NEWFS.FFS(1M-SysV)



NAME
     newfs.ffs - construct a new file system

SYNOPSIS
     /etc/newfs.ffs [ -N ] [ -v ] [ -n ] [ mkfs.ffs-options ]
     special disk-type

DESCRIPTION
     newfs.ffs is a ``friendly'' front-end to the mkfs.ffs(1M)
     program.  newfs.ffs will look up the type of disk a file
     system is being created on in the disk description file
     /etc/disktab, calculate the appropriate parameters to use in
     calling mkfs.ffs, then build the file system by forking
     mkfs.ffs and, if the file system is a root partition,
     install the necessary bootstrap programs in the initial 8
     sectors of the device.  The -n option prevents the bootstrap
     programs from being installed.  (In RISC/os, there are no
     bootstrap programs, so the -n option is allowed but has no
     effect.)  The -N option causes the file system parameters to
     be printed out without actually creating the file system.

     If the -v option is supplied, newfs.ffs will print out its
     actions, including the parameters passed to mkfs.ffs.

     Options which may be used to override default parameters
     passed to mkfs.ffs are:

     -s size   The size of the file system in sectors.  This
               number will be rounded down to an integral number
               of file system blocks in order to properly create
               the file system.  One file system block will be
               subtracted to account for the read-ahead mechanism
               in the kernel.

     -b block-size
               The block size of the file system in bytes.

     -f frag-size
               The fragment size of the file system in bytes.

     -t #tracks/cylinder

     -c #cylinders/group
               The number of cylinders per cylinder group in a
               file system.  The default value used is 16.

     -m free space %
               The percentage of space reserved from normal
               users; the minimum free space threshhold.  The
               default value used is 10%.

     -o optimization preference (``space'' or ``time'')



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NEWFS.FFS(1M-SysV)  RISC/os Reference Manual   NEWFS.FFS(1M-SysV)



               The file system can either be instructed to try to
               minimize the time spent allocating blocks, or to
               try to minimize the space fragmentation on the
               disk.  If the value of minfree (see above) is less
               than 10%, the default is to optimize for space; if
               the value of minfree greater than or equal to 10%,
               the default is to optimize for time.

     -r revolutions/minute
               The speed of the disk in revolutions per minute
               (normally 3600).

     -S sector-size
               The size of a sector in bytes (almost never any-
               thing but 512).

     -i number of bytes per inode
               This specifies the density of inodes in the file
               system.  The default is to create an inode for
               each 2048 bytes of data space.  If fewer inodes
               are desired, a larger number should be used; to
               create more inodes a smaller number should be
               given.

FILES
     /etc/disktab   for disk geometry and file system partition
     information
     /etc/mkfs.ffs  to actually build the file system

SEE ALSO
     fsck.ffs(1M), mkfs.ffs(1M), tunefs.ffs(1M), dumpfs.ffs(1M).
     fs.ffs(4), disktab(5) in the Programmer's Reference Manual.
     Appendix A, A Fast File System for UNIX, in the System
     Administrator's Guide.

ERRORS
     Should figure out the type of the disk without the user's
     help.

















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