Using 'incorrect' HD geometry.
John Murphy
sub02 at freeode.co.uk
Tue Mar 14 00:31:40 UTC 2006
I'm currently dual booting FreeBSD-5.3 and Windows 2000 on a WD800BB
80GB IDE HD. It all seems to be working very well, but now I want to
install 6.0 on the slice where 5.3 is. fdisk -s currently says:
/dev/ad0: 155061 cyl 16 hd 63 sec
Part Start Size Type Flags
1: 63 5981220 0x0b 0x00
2: 5981283 13971447 0xa5 0x80
3: 19958400 136337040 0x0f 0x00
The problem is that the installer says that geometry of 155061/16/63
is incorrect and suggests using the BIOS geometry of 38309/16/255.
I'm worried that if I change the geometry I may lose the existing
Win2k slices (1 and 3 in the fdisk output). I'm not even convinced
that what the BIOS says is correct, as I get the following from other
sources:
16383/16/63 from the Western Digital web site.
10337/240/63 probed values from Scisoft Sandra.
10337/240/63 " " " Ranish Partition Manager.
If I make sure the installer uses the existing incorrect geometry,
does that guarantee that the other slices will be unaffected?
What future problems may that lead to?
--
John.
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