What might be the recommendation file system for a grub partition ?

Question

I have an Ubuntu VDI image (created through Virtual box) in one laptop and want to install Ubuntu on bare metal using this VDI image.
Is it possible ?

Answer 1

I'd stick to the defaults, an ext* filesystem. Personally I use ext2 because the journaling function of ext3/ext4 can make mounting the filesystem slower (observed on a flash memory stick). AFAIK journaling can be disabled for ext4, but since I was happy with ext2 I did not consider ext4 for read-only partitions like /boot.

MacFUSE seems to work for accessing ext2/3 partitions (read+write)
Windows supports ext2 (and ext3 without journal) with the driver from http://www.fs-driver.org/ (see also The best choice of linux file system and software that can be accesed from Windows)

Avoid filesystems that do not support Linux file permissions like NTFS and FAT*. Although all files are owned by root and most of them have permissions 644, lack of proper permissions support could set inappropriate default permissions for the files.