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install/46893: sysinst(8) sets up an invalid disk layout
>Synopsis: sysinst(8) sets up an invalid disk layout
>Arrival-Date: Mon Sep 03 08:30:00 +0000 2012
>Originator: Roy Marples
>Release: 6.0 RC1
NetBSD uberserver.marples.name 6.0_RC1 NetBSD 6.0_RC1 (GENERIC) amd64
I bought a Shuttle XS35 702. I started a PXE install of NetBSD-6.0 RC1 and
selected all default options aside from custom sets to install. Installation
was flawless, but upon reboot I was greated with a message "NetBSD MBR: No
operating system found".
I've uploaded screenshots of fdisk and disklabel output from the faulty install
Also, a support excerpt from Martin Husemann
On Thu, Aug 30, 2012 at 12:24:51PM +0200, Martin Husemann wrote:
Disk: /dev/wd0d NetBSD disklabel disk geometry: cylinders: 310101, heads:
16, sectors/track: 63 (1008 sectors/cylinder) total sectors: 312581808 BIOS
disk geometry: cylinders: 1023, heads: 255, sectors/track: 63 (16065
sectors/cylinder) total sectors: 312581808
Ok, I now got what jak was trying to explain to you:
the BIOS disk geometry is invalid, 255 heads is an impossible value (it needs
to be between 1 and 16). I can not emulate this geometry with qemu, as it
rejects this invalid configuration.
So: something must be wrong in the bootblocks (which pass this entry to the
Can you please file a PR?
I worked around the problem by using a NetBSD 5.1.2 INSTALL kernel to setup the
disklabel and format it to FFSv2. Once this was complete, I changed back to the
NetBSD 6.0 RC1 INSTALL kernel and it worked just fine.
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