On Fri, Aug 05, 2011 at 12:27:51PM +0800, Robin Dong wrote: > From: Robin Dong <sanbai@xxxxxxxxxx> > > After mke2fs with 1024 block size: > > #misc/mke2fs -m 0 -O ^resize_inode,extent,meta_bg,bigalloc -b 1024 /dev/sda > > kernel reports: > > [74687.352702] EXT4-fs (loop0): ext4_check_descriptors: Inode bitmap for group 0 not in group (block 524288)! > [74687.355534] EXT4-fs (loop0): group descriptors corrupted! > > when mount /dev/sda. Wow, out of curiosity, why are you using a 1k block size? Actually, the bug here is in the kernel (in complaining), not in e2fsprogs. The only time we want s_first_data_block to be 1 is in the case when block size and cluster is 1024. In the case where the cluster is greater than 1k, we want to keep the clusters aligned (for efficiency with 4k blocksize disks if for no other reason). Since the superblock is located at a 1k offset, cluster #0 will always be reserved, so the first 1k is already reserved for use by the bootloader. - 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
