7

I fired up fdisk and got this warning:

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

I didn't even know that my previous Linux installs where DOS-compatible in any way!

What changes?! The man page says nothing about it.

Thanks for answering.

SamK
  • 524

2 Answers2

7

Here is your answer. DOS doesn't allow a partition to start (or end) mid-cylinder. It assumes the partition table is corrupt when it sees this, and not only won't boot off of that partition, it won't boot any partition on the disk.

Basically, unless you're dual-booting, turn DOS compatibility off. Even if you are, unless you're running an old version of DOS/Windows, turn it off.

BMDan
  • 205
1

from googling:

http://ubuntuforums.org/archive/index.php/t-1443700.html

Sirex
  • 11,214