# $OpenBSD: disktab,v 1.7 2007/04/25 21:40:35 deraadt Exp $ # Disk geometry and partition layout tables. # Key: # dt controller type # ty type of disk (fixed, removable, simulated) # d[0-4] drive-type-dependent parameters # ns #sectors/track # nt #tracks/cylinder # nc #cylinders/disk # sc #sectors/cylinder, ns*nt default # su #sectors/unit, sc*nc default # se sector size, DEV_BSIZE default # rm rpm, 3600 default # sf supports bad144-style bad sector forwarding # sk sector skew per track, default 0 # cs sector skew per cylinder, default 0 # hs headswitch time, default 0 # ts one-cylinder seek time, default 0 # il sector interleave (n:1), 1 default # bs boot block size, default BBSIZE # sb superblock size, default SBSIZE # o[a-p] partition offsets in sectors # p[a-p] partition sizes in sectors # b[a-p] partition block sizes in bytes # f[a-p] partition fragment sizes in bytes # t[a-p] partition types (filesystem, swap, etc) # # All partition sizes reserve space for bad sector tables. # (5 cylinders needed for maintenance + replacement sectors) # floppy288|3in|3.5in High Density Floppy, 2.88MB:\ :dt=floppy:ty=floppy:se#512:nt#2:rm#300:ns#36:nc#80:\ :pa#5760:oa#0:ba#4096:fa#512:ta=4.2BSD: \ :pb#5760:ob#0:\ :pc#5760:oc#0: floppy|floppy3|3in|3.5in High Density Floppy:\ :dt=floppy:ty=floppy:se#512:nt#2:rm#300:ns#18:nc#80:\ :pa#2880:oa#0:ba#4096:fa#512:ta=4.2BSD: \ :pb#2880:ob#0:\ :pc#2880:oc#0: floppy5|5in|5.25in High Density Floppy:\ :dt=floppy:ty=floppy:se#512:nt#2:rm#300:ns#15:nc#80:\ :pa#2400:oa#0:ba#4096:fa#512:ta=4.2BSD: \ :pb#2400:ob#0:bb#4096:fb#512:\ :pc#2400:oc#0:bc#4096:fc#512: rdroot|ramdiskroot|RAM-disk root FS image:\ :ty=ramdisk:se#512:nt#2:ns#128:nc#16:\ :pa#4096:oa#0:ta=4.2BSD:ba#4096:fa#512:\ :pb#0:ob#0:tb=swap:\ :pc#4096:oc#0: