I have disk shared between FreeBSD and M$ Win, two slices, and got incorrect disklabel with GEOM kernel. Namely "cylinders" and "sectors/unit" fields are from _whole_ disk, not from just requested slice.
It invalidates previously correct 'c' BSD partition too, 'disklabel' outputs several warnings about it. I am not familiar with GEOM. In which place it senses cylinders and secs/unit? Does anyone saw the same problem too? Specific info attached below. Look at the wrong fields in disklabel. They even can't be corrected using 'disklabel -e'. ---------------------------------------------------------------------- fdisk: can't get disk parameters on /dev/ad0; supplying dummy ones ******* Working on device /dev/ad0 ******* parameters extracted from in-core disklabel are: cylinders=89355 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=89355 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 165 (0xa5),(FreeBSD/NetBSD/386BSD) start 63, size 12514572 (6110 Meg), flag 80 (active) beg: cyl 0/ head 1/ sector 1; end: cyl 778/ head 254/ sector 63 The data for partition 2 is: sysid 7 (0x07),(OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX) start 12514698, size 77545692 (37864 Meg), flag 0 beg: cyl 779/ head 1/ sector 1; end: cyl 1023/ head 254/ sector 63 The data for partition 3 is: <UNUSED> The data for partition 4 is: <UNUSED> ---------------------------------------------------------------------- # /dev/ad0s1c: type: ESDI disk: ad0s1 label: flags: bytes/sector: 512 sectors/track: 63 tracks/cylinder: 255 sectors/cylinder: 16065 cylinders: 5606 ^^^^^^^^^^^^^^^^^^^^^^^ must be 778 (or 779?) sectors/unit: 90069840 ^^^^^^^^^^^^^^^^^^^^^^^ must be 12514572 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: 11900172 614400 4.2BSD 2048 16384 64 # (Cyl. 38*- 778*) b: 614400 0 swap # (Cyl. 0 - 38*) c: 12514572 0 unused 0 0 # (Cyl. 0 - 778*) -- Andrey A. Chernov http://ache.pp.ru/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message