Date: Tue, 30 Sep 1997 22:35:42 +0200 From: Ollivier Robert <roberto@keltia.freenix.fr> To: "FreeBSD Current Users' list" <freebsd-current@FreeBSD.ORG> Subject: Geometry weirdness with sysinstall/libdisk Message-ID: <19970930223542.44057@keltia.freenix.fr>
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Hi,
Why is tst01 (bundled with libdisk) getting my geometry 1) wrong and
2) differently for each of my disks ? It forbid me to use sysinstall as a
disk configuration utility for all my other disks because
1. the geometry is wrong and giving it the good one doesn't help,
2. the slices information is decoded wrongly so I can't just modify the
existing label with it.
sd0 is an IBM DCAS UW 4.3 GB with 2 DOS slices and my booting FreeBSD
slice.
tst01 sd0 correctly gives:
--==##==--
Debug_Disk(sd0) flags=0 bios_geom=1018/132/63 = 8465688
boot1=0x0, boot2=0x0, bootmgr=0x0
--> 0x14040 0 8467200 8467199 sd0 whole 0x00
--> 0x14080 0 63 62 - unused 0x00
--> 0x140c0 63 415737 415799 sd0s1 fat 0x06 =
--> 0x14100 415800 5729724 6145523 sd0s2 freebsd 0xa5 C=
--> 0x14180 415800 51200 466999 sd0s2a part 0x07
--> 0x14200 467000 262144 729143 sd0s2b part 0x01
--> 0x14240 729144 409600 1138743 sd0s2e part 0x07
--> 0x14280 1138744 1024000 2162743 sd0s2f part 0x07
--> 0x142c0 2162744 819200 2981943 sd0s2g part 0x07
--> 0x14300 2981944 1433600 4415543 sd0s2h part 0x07
--> 0x14340 4415544 1729980 6145523 sd0s2d part 0x07
--> 0x141c0 6145524 2320164 8465687 sd0s3 extended 0x05 =
--> 0x14380 6145524 63 6145586 - unused 0x00
--> 0x14140 6145587 2320101 8465687 sd0s5 fat 0x06 =
--> 0x143c0 8465688 1512 8467199 - unused 0x00
Now, sd2 is an IBM DORS 2 GB narrow.
tst01 sd2 gives this absolutely false geometry:
--==##==--
Debug_Disk(sd2) flags=0 bios_geom=13045/54/6 = 4226580
boot1=0x0, boot2=0x0, bootmgr=0x0
--> 0x14040 0 4226725 4226724 sd2 whole 0x00 >
--> 0x14080 0 4226725 4226724 - unused 0x00 >
The right one is obtained by using sd2c as a device :
--==##==--
Debug_Disk(sd2c) flags=0 bios_geom=2063/64/32 = 4225024
boot1=0x0, boot2=0x0, bootmgr=0x0
--> 0x14040 0 4226725 4226724 sd2c whole 0x00 >
--> 0x14080 0 4226725 4226724 - unused 0x00 >
Anyway, the output of tst01 is still wrong on one account because the real
label is the following. Why is disklabel getting the right information when
libdisk can't ??? I thought they were using the same ioctl ??
And where is this 13045 coming from ? It doesn't match the -- fictious --
geometry displayed when booting with -v.
Controller is an ASUS PCI-875. sd0 on internal wide cable and DORS on the
internal narrow one.
# /dev/rsd2c:
type: SCSI
disk: IBM32160
label:
flags:
bytes/sector: 512
sectors/track: 32
tracks/cylinder: 64
sectors/cylinder: 2048
cylinders: 2063
sectors/unit: 4226725
rpm: 5400
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: 40960 0 4.2BSD 1024 8192 16 # (Cyl. 0 - 19)
b: 131072 40960 swap # (Cyl. 20 - 83)
c: 4226725 0 unused 0 0 # (Cyl. 0 - 2063*)
d: 204800 172032 4.2BSD 1024 8192 16 # (Cyl. 84 - 183)
e: 716800 376832 4.2BSD 1024 8192 16 # (Cyl. 184 - 533)
f: 409600 1093632 4.2BSD 1024 8192 16 # (Cyl. 534 - 733)
g: 1024000 1503232 4.2BSD 1024 8192 16 # (Cyl. 734 - 1233)
h: 1699493 2527232 4.2BSD 1024 8192 16 # (Cyl. 1234 - 2063*)
--
Ollivier ROBERT -=- FreeBSD: There are no limits -=- roberto@keltia.freenix.fr
FreeBSD keltia.freenix.fr 3.0-CURRENT #35: Sun Sep 21 19:28:07 CEST 1997
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