On Mon, Jul 08, 2013 at 04:32:50PM -0500, Michael wrote: > I have a currently 15TB FS that I want to expand to 18TB. > Unfortunately EXT4 e2fsprogs has an issue that stops you from being > able to do this: > > sudo resize2fs /dev/md0 > resize2fs 1.42.5 (29-Jul-2012) > resize2fs: New size too large to be expressed in 32 bits > > It seems to me, reading the change logs, that this only supported if > you created your FS with 64 bit specified. There seems to have been a > patch last year that added support for changing 32->64bit, but I had a > hard time finding/tracking that. Unfortuantely, there is no patch that would enable this. In theory it could be done; it would require doubling the size of the block group descriptors, which would require moving other metadata blocks out of the way. Resize2fs does do this when growing a file system off-line when no blocks are available from the resize inode, but no one has implemented the necessary changes to extend this to adding the 64-bit feature. So it's technically possible, but it's not implemented at this time. Sorry, - 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
