40 lines
1.5 KiB
Plaintext
40 lines
1.5 KiB
Plaintext
# $NetBSD: disktab,v 1.5 2002/05/07 11:29:39 simonb Exp $
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#
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# from: @(#)disktab 8.1 (Berkeley) 6/9/93
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#
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# Disk geometry and partition layout tables.
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# Key:
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# dt controller type
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# ty type of disk (fixed, removeable, simulated)
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# d[0-4] drive-type-dependent parameters
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# ns #sectors/track
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# nt #tracks/cylinder
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# nc #cylinders/disk
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# sc #sectors/cylinder, nc*nt default
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# su #sectors/unit, sc*nc default
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# se sector size, DEV_BSIZE default
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# rm rpm, 3600 default
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# sf supports bad144-style bad sector forwarding
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# sk sector skew per track, default 0
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# cs sector skew per cylinder, default 0
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# hs headswitch time, default 0
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# ts one-cylinder seek time, default 0
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# il sector interleave (n:1), 1 default
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# bs boot block size, default BBSIZE
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# sb superblock size, default SBSIZE
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# o[a-h] partition offsets in sectors
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# p[a-h] partition sizes in sectors
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# b[a-h] partition block sizes in bytes
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# f[a-h] partition fragment sizes in bytes
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# t[a-h] partition types (filesystem, swap, etc)
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# b[0-1] primary and secondary bootstraps, optional
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#
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# All partition sizes contain space for bad sector tables unless
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# the device drivers fail to support this. Smaller disks may
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# not have all partitions and all disks have no defaults for
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# the `h' partition. The strategy here is that `a' always
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# has the same amount for all disks (currently 65536 sectors or 32megs).
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# The `b' partition is approx 48 megs while `c' is always the entire disk.
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# The sum of `d', `e', and `f' is equal to `g' which is everything else.
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