.TH NEWFS 8 "20 February 1983" .UC 4 .SH NAME newfs \- construct a new file system .SH SYNOPSIS .B /etc/newfs [ .B \-v ] [ .B \-n ] [ .B mkfs-options ] .B special disk-type .SH DESCRIPTION .I Newfs is a ``friendly'' front-end to the .IR mkfs (8) program. .I Newfs will look up the type of disk a file system is being created on in the disk description file .IR /etc/disktab , calculate the appropriate parameters to use in calling .IR mkfs , then build the file system by forking .I mkfs and, if the file system is a root partition, install the necessary bootstrap programs in the initial 8 sectors of the device. The .B \-n option prevents the bootstrap programs from being installed. .PP If the .B \-v option is supplied, .I newfs will print out its actions, including the parameters passed to .IR mkfs . .PP Options which may be used to override default parameters passed to .I mkfs are: .TP 10 .B \-s size The size of the file system in sectors. .TP 10 .B \-b block-size The block size of the file system in bytes. .TP 10 .B \-f frag-size The fragment size of the file system in bytes. .TP 10 .B \-t #tracks/cylinder .TP 10 .B \-c #cylinders/group The number of cylinders per cylinder group in a file system. The default value used is 16. .TP 10 .B \-m free space % The percentage of space reserved from normal users; the minimum free space threshhold. The default value used is 10%. .TP 10 .B \-r revolutions/minute The speed of the disk in revolutions per minute (normally 3600). .TP 10 .B \-S sector-size The size of a sector in bytes (almost never anything but 512). .TP 10 .B \-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. .SH FILES /etc/disktab for disk geometry and file system partition information .br /etc/mkfs to actually build the file system .br /usr/mdec for boot strapping programs .SH "SEE ALSO" disktab(5), fs(5), diskpart(8), fsck(8), format(8), mkfs(8), tunefs(8) .PP McKusick, Joy, Leffler; "A Fast File System for Unix", Computer Systems Research Group, Dept of EECS, Berkeley, CA 94720; TR #7, September 1982. .SH BUGS Should figure out the type of the disk without the user's help.