# $NetBSD: disktab,v 1.5 2002/05/07 11:29:39 simonb Exp $ # # from: @(#)disktab 8.1 (Berkeley) 6/9/93 # # Disk geometry and partition layout tables. # Key: # dt controller type # ty type of disk (fixed, removeable, simulated) # d[0-4] drive-type-dependent parameters # ns #sectors/track # nt #tracks/cylinder # nc #cylinders/disk # sc #sectors/cylinder, nc*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-h] partition offsets in sectors # p[a-h] partition sizes in sectors # b[a-h] partition block sizes in bytes # f[a-h] partition fragment sizes in bytes # t[a-h] partition types (filesystem, swap, etc) # b[0-1] primary and secondary bootstraps, optional # # All partition sizes contain space for bad sector tables unless # the device drivers fail to support this. Smaller disks may # not have all partitions and all disks have no defaults for # the `h' partition. The strategy here is that `a' always # has the same amount for all disks (currently 65536 sectors or 32megs). # The `b' partition is approx 48 megs while `c' is always the entire disk. # The sum of `d', `e', and `f' is equal to `g' which is everything else.