On Thu, Jun 28, 2012 at 11:16:31AM -0400, Phillip Susi wrote: > > I notice that mke2fs refuses to allow more than 8 * block size blocks > per group. Why is this? Is it not permissible to have more than one > block for the block allocation bitmap? No, it's not permissible; it's been a fundamental design constraint in ext2/3/4 since the very beginning. You can, however, get the moral equivalent by using flex_bg which moves the metadata blocks to the beginning of an aggregated of (for example) 16 block groups of a flex_bg. The block allocation bitmaps are allocated contiguously, so between that and locating all of the metadata blocks of the bg's at the beginning of a flex_bg, that should get most of what you'd want with a larger number of blocks in a block group. And BTW, this is already the default in ext4 (using 16 block groups in each flex_bg). - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
