Bug 35940 - fdisk has wrong limit for # of cylinders
fdisk has wrong limit for # of cylinders
Product: Red Hat Linux
Classification: Retired
Component: util-linux (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Elliot Lee
David Lawrence
Depends On:
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Reported: 2001-04-14 18:51 EDT by Marty Shannon
Modified: 2007-04-18 12:32 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2001-07-16 09:41:56 EDT
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Description Marty Shannon 2001-04-14 18:51:42 EDT
This is in SEAWOLF!

On a machine that previously had Wolverine installed (which means that it
changed the CHS info on the MBR to incorrect, but usable values), at
install time for SEAWOLF, I chose to use fdisk to correct the CHS info
(using expert mode).  I correctly set the heads to 16, the sectors to 63,
but fdisk enforces a cylinder limit of 131071 -- even though the correct
number for my drive (Maxtor 80 Gig) is 158816.  If I use fdisk to examine
the other 2 identical drives on the same box, it correctly reports their
geometry as 158816/16/63.  As long as this is the behavior, I cannot
install any Microsoft OSs on the same drive (they can't handle the 255 head
remapping, I think).  I do believe that the correct cylinder limit is 256k
- 1, not 128k - 1.
Comment 1 Elliot Lee 2001-07-18 19:40:51 EDT
I've changed the limit to 1 million. I have no clue what it's actually supposed
to be, but it's not like the current one made any more sense than the new one :)

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