Messages in this thread | | | Date | Thu, 21 Jan 1999 22:52:49 +0100 (MET) | From | (Guest section DW) | Subject | Re: 10.2 Gig HDD |
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From: Max <max@Linuz.sns.it>
Logical geometry used by Linux must be such that Linux can calculate the correct physical geometry from it.
False.
Now, IDE disks can have at most 16 *physical* heads. If you tell the kernel that the geometry of your disk is 787/128/63 (as with my 3G Western Digital) the kernel will use the *physical* geometry 6296/16/63 for C/H/S addressing (it's deduced from the logical geometry you specify, knowing Heads<=16)
False.
Till now things are simple: get your disk *physical* geometry, invent a COMPATIBLE logical geometry and tell it to the kernel.
By 'compatible' I mean: the kernel must be able to deduce the correct physical geometry from it. It's easy since the kernel divides by 2 the number of heads and multiplies by 2 the numbers of cylinders, until heads<=16, to get the physical geometry.
Hogwash. Please do not spread nonsense if you do not know what you are talking about.
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