fdisk incompatibility between major versions
roberthuff at rcn.com
Mon May 25 17:28:11 UTC 2009
Due to a combination of my spectacular stupidity and external
events, a machine running -Current from late April will no longer boot.
Specifically, instead of the loader menu screen I get "Invalid partition".
Broke out the most recent fixit disk, which is from 7.1 (Jan 2009).
Boots fine; fdisk finds the correct slice information; bsdlabel
finds the right partition data; mount / and /usr under LiveFS
So ... I'm guessing the problem in the boot code is corrupted, and
if I do
fdisk -B -b <path to -CURRENT boot blocks> da0
it should put things back to normal.
However: when I do the second commit I get
fdisk: Geom not found "da0"
fdsk: failed to write sector 0
This leads to the assumption there is a fundamental discrepancy
between the two versions. Not unreasonable, as I know there have been
changes in the filesystem code since 7.1.
0) is the diagnosis correct, and will my proposed solution work
1) if so, is there a way to convince the 7.1 fdisk to Do The Right
2) if not, what do I do next?
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