Date: Tue, 14 Mar 2006 00:31:37 +0000 From: John Murphy <sub02@freeode.co.uk> To: freebsd-questions@freebsd.org Subject: Using 'incorrect' HD geometry. Message-ID: <qr2c125n68bv0m8u7phhchoks0geet8ch9@4ax.com>
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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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