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Date:      Tue, 28 Mar 2000 00:20:25 -0500 (EST)
From:      <ziggy@panix.com>
To:        freebsd-hackers@freebsd.org
Subject:   Problem installing 3.4-RELEASE: IDE Disk Geometry
Message-ID:  <200003280520.AAA24881@panix.com>

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Hi,

Apologies if this question has been asked before; I couldn't seem to
find any answers in the bug database.

I've got a new BP6 dual Celeron configuration with a 20GB IBM HD.
The BIOS reports the geometry as follows:
	2495 cylinders
	 255 heads
	  63 sectors
	----
	400082175 total blocks

For some reason, fdisk cannot determine that during the install, and 
it finds a bogus geometry, sometimes adding up to 2GB, other times
adding up to 4GB.  Once I fire up the emergency shell and try to configure
the geometry by hand on tty4, this is the only geometry that comes up:

	65536 cylinders
	    1 head
	   63 sectors
	-----
	4128768 blocks

When I reset the disk geometry in the graphical fdisk from sysinstall,
the geometry appears to be reset, but the number of blocks available to
allocate is unchanged (4M blocks).  When I reset the geometry on tty4
using the CLI fdisk, the geometry reverts to 64K/1/63.

Any way to work around this and allocate the full 20GB to freebsd?

Thanks,

-- Adam



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