newfs(1M)                                                         newfs(1M)

NAME
     newfs - construct a new file system

SYNOPSIS
     /sbin/newfs [-N] [-v] [mkfsoptions] special

DESCRIPTION
     newfs is a "friendly" front-end to the mkfs(1M) program. newfs will
     gather information on the type of disk a file system is being created,
     and calculate the appropriate parameters to use in calling mkfs. It
     then builds the file system by forking mkfs and fsirand. special must
     be a special character device file (for example,
     /dev/ios0/rsdisk000s1).

OPTIONS
     These options override the default actions taken by newfs:

     -N      Causes the file system parameters to be printed out without
             actually creating the file system.

     -v      Causes newfs to print out its actions, including the parame-
             ters passed to mkfs.

     The file system specific mkfsoptions used to override default parame-
     ters passed to mkfs are:

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

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

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

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

     -i nbpi This specifies the density of inodes in the file system. The
             default is to try 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. See mkfs(1M) for further information.

     -o opt  The optimization for the file system. It can be either space
             or time.

     The disk drive specific mkfsoptions used to override default parame-
     ters passed to mkfs are:




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newfs(1M)                                                         newfs(1M)

     -s nsect
             The size of the file system in sectors.

     -t ntrack
             The number of a tracks per cylinder on the disk.

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

     -d gap  The rotational delay (or gap) for the file system.

     -a apc  The number of alternate sectors per cylinder.

     -S secsize
             The sector size derived from the device during initial drive
             format. The default for this is 512 bytes for SCSI drives.

     -q      This causes the mkfs -f option to be set. This causes mkfs to
             skip the 10 second delay.

NOTES
     This command may not be supported for all FSTypes.

FILES
     /etc/vfstab
          list of default parameters for each file system

SEE ALSO
     fsirand(1), vfstab(4).

     Manual pages for the FSType-specific modules of mkfs.























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