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1.1       root        1: .TH MKFS 8 "10 May 1981"
                      2: .UC 4
                      3: .SH NAME
                      4: mkfs \- construct a file system
                      5: .SH SYNOPSIS
                      6: .B /etc/mkfs
                      7: special size
                      8: [ nsect ]
                      9: [ ntrack ]
                     10: [ blksize ]
                     11: [ fragsize ]
                     12: [ ncpg ]
                     13: [ minfree ]
                     14: [ rps ]
                     15: .SH DESCRIPTION
                     16: .B N.B.:
                     17: file system are normally created with the
                     18: .IR newfs (8)
                     19: command.
                     20: .PP
                     21: .I Mkfs
                     22: constructs a file system
                     23: by writing on the special file
                     24: .I special.
                     25: The numeric size specifies the number of sectors in the file system.
                     26: .I Mkfs
                     27: builds a file system with a root directory and a
                     28: .I lost+found
                     29: directory.
                     30: (see 
                     31: .IR fsck (8))
                     32: The number of i-nodes is calculated as a function of the file system size.
                     33: No boot program is initialized by
                     34: .I mkfs
                     35: (see
                     36: .IR newfs (8).)
                     37: .PP
                     38: The optional arguments allow fine tune control over the
                     39: parameters of the file system.
                     40: .B Nsect
                     41: specify the number of sectors per track on the disk.
                     42: .B Ntrack 
                     43: specify the number of tracks per cylinder on the disk.
                     44: .B Blksize 
                     45: gives the primary block size for files on the file system.
                     46: It must be a power of two, currently selected from 4096 or 8192.
                     47: .B Fragsize
                     48: gives the fragment size for files on the file system.
                     49: The
                     50: .B fragsize
                     51: represents the smallest amount of disk space that will be allocated to a file.
                     52: It must be a power of two currently selected from the range 512 to 8192.
                     53: .B Ncpg
                     54: specifies the number of disk cylinders per cylinder group.
                     55: This number must be in the range 1 to 32.
                     56: .B Minfree
                     57: specifies the minimum percentage of free disk space allowed.
                     58: Once the file system capacity reaches this threshold, only
                     59: the super-user is allowed to allocate disk blocks.  The default
                     60: value is 10%.
                     61: If a disk does not revolve at 60 revolutions per second, the
                     62: .B rps
                     63: parameter may be specified.
                     64: Users with special demands for their file systems are referred to
                     65: the paper cited below for a discussion of the tradeoffs in using
                     66: different configurations.
                     67: .SH "SEE ALSO"
                     68: fs(5),
                     69: dir(5),
                     70: fsck(8),
                     71: newfs(8),
                     72: tunefs(8)
                     73: .PP
                     74: McKusick, Joy, Leffler; "A Fast File System for Unix",
                     75: Computer Systems Research Group, Dept of EECS, Berkeley, CA 94720;
                     76: TR #7, September 1982.
                     77: .SH BUGS
                     78: There should be some way to specify bad blocks.

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