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disktab
42 lines (42 loc) · 1.4 KB
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disktab
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#
# $NetBSD: disktab,v 1.2.2.1 1995/11/21 21:03:50 gwr Exp $
#
# 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, 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-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)
#
# All partition sizes reserve space for bad sector tables.
# (5 cylinders needed for maintenance + replacement sectors)
#
# XXX - Would like :ba#4096:fa#512: but that panics...
# Leave nc=16; adjust size using: ns
rdroot|ramdiskroot|RAM-disk root FS image:\
:ty=simulated:se#512:nc#16:nt#2:ns#16:\
:ta=4.4BSD:oa#0:pa#512:\
:ob#0:pb#0:oc#0:pc#512:
miniroot|Installation root-on-swap FS image:\
:ty=simulated:se#512:ns#32:nt#8:nc#64:\
:ta=4.4BSD:oa#0:pa#16384:\
:ob#0:pb#0:oc#0:pc#16384: