strange fdisk numbers
j w
jwdevel at gmail.com
Fri Feb 23 06:28:52 UTC 2007
Hello
(first post, so let me know if this is the wrong list for this)
I am working up the courage to use growfs, but got a little confused
by fdisk's numbers.
The output is below, but what interests me is that it says "heads=16",
but then later on has some partitions(slices) saying "head 254" and
such
there's 16 tracks/cylinder, so maybe that figures in the calculation
somehow? (16 tracks * 16 heads ?)
I put the output of bsdlabel -A as well
any ideas?
******* Working on device /dev/ad2 *******
parameters extracted from in-core disklabel are:
cylinders=26310 heads=16 sectors/track=63 (1008 blks/cyl)
Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=26310 heads=16 sectors/track=63 (1008 blks/cyl)
Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 7 (0x07),(OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX)
start 63, size 10490382 (5122 Meg), flag 0
beg: cyl 0/ head 1/ sector 1;
end: cyl 652/ head 254/ sector 63
The data for partition 2 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 14683410, size 11837070 (5779 Meg), flag 80 (active)
beg: cyl 1023/ head 255/ sector 63;
end: cyl 1023/ head 15/ sector 63
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>
# /dev/ad2s2:
type: unknown
disk: amnesiac
label:
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 11743
sectors/unit: 11837070
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # milliseconds
track-to-track seek: 0 # milliseconds
drivedata: 0
8 partitions:
# size offset fstype [fsize bsize bps/cpg]
a: 1048576 0 4.2BSD 2048 16384 8
b: 2045792 1048576 swap
c: 11837070 0 unused 0 0 # "raw" part, don't edit
d: 3119104 3094368 4.2BSD 2048 16384 28552
e: 1048576 6213472 4.2BSD 2048 16384 8
f: 4575022 7262048 4.2BSD 2048 16384 28552
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