On Jan 12, 2007, at 1:04 AM, Jo Rhett wrote:
To make this into a step-by-step, what do you mean by "restore the MBR
partition" ? From backup, or...?
Marcel Moolenaar wrote:
Manually recreate, I guess. When creating a GPT, the MBR is replaced
by a PMBR. A PMBR is a MBR with a single partition spanning the
whole disk (or as much as can be covered by the MBR) that has type
0xEE. The GPT kernel code expects such a partition but does not care
if there are others. If you restore the MBR from a backup, the 0xEE
partition will be gone and the GPT will not be used.
It would probably be nice if gpt(8) could migrate without destroying
the existing MBR partition, because restoring the MBR partition is
the least intuitive step. Let me think about this for a bit...
I am very interested in solving this problem, and have machines I am
more than willing to dedicate to this project. I'm just somehow lacking
a clear understanding of what I need to do to test this:
1. Install FreeBSD with a normal MBR partition and leftover free space
2. Migrate the partition to GPT (can I do this from CD fixit mode?)
3. Create a GPT partition using the remaining space
4. Recreate the MBR partition in the original space
... this makes sense, but I suspect that I'm missing a step/option here.
--
Jo Rhett
senior geek
Silicon Valley Colocation
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