On Oct 29, 2009, at 11:37 AM, Bryan Kadzban wrote:
Again, this is all related to mounting the rootfs. GRUB2 does simplify a lot of setups that still require an initramfs, so that they don't needa separate (non-LVM, sometimes even non-RAID) /boot partition.
I saw that and thought it was a great reason to move to GRUB2. But it's only true for DOS-style partition maps. If you've got big disks and must use GPT partitions (or just want to) you still need a partition for the GRUB2 core.img file.
From http://grub.enbug.org/LVMandRAID:
For IBM/MS-DOS partitions this means that there should be ample space between the MBR and the start of the first partition so that the core.img can be written there.When using GPT there isn't any free space available between the MBR and the first partition since this area is used by the GPT. When you want to store the core.img on a GPT labeled device, you need to create a BIOS Boot Partition, which GRUB will detect and use.
So you might not need a filesystem on /boot, but you still need to setup a non-LVM, non-RAID partition so the BIOS can find your GRUB2 kernel, which is more or less the same amount of hassle.
Zach
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