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disktab.preinstall revision 1.1 
      1  1.1  nonaka #	$NetBSD: disktab.preinstall,v 1.1 2010/04/06 15:54:31 nonaka Exp $
      2  1.1  nonaka #
      3  1.1  nonaka # Disk geometry and partition layout tables. 
      4  1.1  nonaka # Key:
      5  1.1  nonaka #	dt	controller type
      6  1.1  nonaka #	ty	type of disk (fixed, removable, simulated)
      7  1.1  nonaka #	d[0-4]	drive-type-dependent parameters
      8  1.1  nonaka #	ns	#sectors/track
      9  1.1  nonaka #	nt	#tracks/cylinder
     10  1.1  nonaka #	nc	#cylinders/disk
     11  1.1  nonaka #	sc	#sectors/cylinder, nc*nt default
     12  1.1  nonaka #	su	#sectors/unit, sc*nc default
     13  1.1  nonaka #	se	sector size, DEV_BSIZE default
     14  1.1  nonaka #	rm	rpm, 3600 default
     15  1.1  nonaka #	sf	supports bad144-style bad sector forwarding
     16  1.1  nonaka #	sk	sector skew per track, default 0
     17  1.1  nonaka #	cs	sector skew per cylinder, default 0
     18  1.1  nonaka #	hs	headswitch time, default 0
     19  1.1  nonaka #	ts	one-cylinder seek time, default 0
     20  1.1  nonaka #	il	sector interleave (n:1), 1 default
     21  1.1  nonaka #	bs	boot block size, default BBSIZE
     22  1.1  nonaka #	sb	superblock size, default SBSIZE
     23  1.1  nonaka #	o[a-h]	partition offsets in sectors
     24  1.1  nonaka #	p[a-h]	partition sizes in sectors
     25  1.1  nonaka #	b[a-h]	partition block sizes in bytes
     26  1.1  nonaka #	f[a-h]	partition fragment sizes in bytes
     27  1.1  nonaka #	t[a-h]	partition types (filesystem, swap, etc)
     28  1.1  nonaka #
     29  1.1  nonaka # All partition sizes reserve space for bad sector tables.
     30  1.1  nonaka # (5 cylinders needed for maintenance + replacement sectors)
     31  1.1  nonaka #
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