It seems quite obvious to me -- New technologies are likely to make the natural block size larger over time. Where by "natural block size", I mean the block alignment necessary to get highest performance out of the device/system. You don't want to have to keep modifying your disk structuring software every time a new technology comes out that has a larger natural block size -- and then discover you've got to reorganize all your disk images. By going to 1 MiB alignment now, we may be able to keep the alignment and allocation policies stable for ten or twenty years. If you have a good reason to use a smaller alignment, the software lets you override the default. But the default minimizes the trouble you risk in the future. Dale -- To unsubscribe from this list: send the line "unsubscribe util-linux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html