Message-Id: <a05100302b89cc361de3e@[192.168.0.10]> Date: Fri, 22 Feb 2002 22:56:25 -0500 From: "Luis F. Ortiz" <LuisOrtiz@telocity.com> Subject: Re: [suse-sparc] having trouble with adding a new hard drive into my blade 100
>O.K. it's an IBM Deskstar 80Gb, ata100, model 07N8084. 7200rpm
>...
>Have already had a different 80Gb in the machine and that went in no
>problem, so is this drive incompatible ? or am i just totally
>missing the point?
>
>yours a.r.b.
Seeing as I just installed a 60 Gb GXP, I think I can give you a hint.
The product of the number of cylinders times the number of sectors
times the number of heads needs to equal the number of blocks. For my
drive, it says that there are 120,103,200 sectors on the disk. Tracks
can range from 1 to 1024, heads from 1 to 1024 and cylinders from 1
to 65535, so you want to get a combination that is close, but less
than the number of sectors. For my disk 9 heads, 800 sectors, 16681
cylinders is exactly on the money. Deduct two cylinders and you have
the numbers to use.
The label on the Deskstar drive tells you the number of sectors.
FDISK lies through its teeth. If you know the drive has 16 heads,
then just multiply the number of heads by two and divide the number
of cylinders by two until things get back into range. But since
things are being addressed by logical block addresses, the whole idea
of CHS addresses is quaint. Many drives have a variable number of
sectors per track, depending on the distance from the spindle.
Good luck.
-- Luis F. Ortiz
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