.TH DISKPART 8 "26 February 1983" .UC 4 .SH NAME diskpart \- calculate default disk partition sizes .SH SYNOPSIS .B diskpart [ .B \-p ] [ .B \-d ] disk-type .SH DESCRIPTION .I Diskpart is used to calculate the disk partition sizes based on the default rules used at Berkeley. If the .B \-p option is supplied, tables suitable for inclusion in a device driver are produced. If the .B \-d option is supplied, an entry suitable for inclusion in the disk description file .I /etc/disktab is generated; c.f. .IR disktab (5). Space is always left in the last physical partition on the disk for a bad sector forwarding table. The space reserved for this table occupies 3 tracks. For more information, see .IR bad144 (8). .PP The disk partition sizes are based on the total amount of space on the disk as give in the table below. The `c' partition is, by convention, used to access the entire physical disk, including the space reserved for the bad sector forwarding table. In normal operation, either the `g' partition is used, or the `d', `e', and `f' partitions are used. The `g' and `f' partitions are variable sized, occupying whatever space remains after allocation of the fixed sized partitions. If the disk is smaller than 20 Megabytes, then .I diskpart aborts with the message ``disk too small, calculate by hand''. .in +0.5i .nf .ta \w'Partition 'u +\w'20-60 MB 'u +\w'61-205 MB 'u +\w'206-355 MB 'u +\w'356+ MB'u Partition 20-60 MB 61-205 MB 206-355 MB 356+ MB a 15884 15884 15884 15884 b 10032 33440 33440 66880 d 15884 15884 15884 15884 e unused 55936 55936 307200 h unused unused 291346 291346 .fi .in -0.5i .PP If an unknown disk type is specified, .I diskpart will prompt for the required disk geometry information. .SH SEE ALSO disktab(5), bad144(8) .SH BUGS Certain default partition sizes are based on historical artifacts (e.g. RP06), and may result in unsatisfactory layouts. .PP When using the \-d flag, alternate disk names are not included in the output.