linux 分区 无法修改LABEL，e2label显示 ‘找不到有效的文件系统超级块’

Question

我在尝试修改标签时

[root@madao madao]# e2label /dev/sda7 "centos_disk"
e2label: Filesystem has unsupported feature(s) 当尝试打开 /dev/sda7 时
找不到有效的文件系统超级块.

我查了一下，能找到superblock额……

[root@madao madao]# dumpe2fs /dev/sda7|grep "superblock"
dumpe2fs 1.41.12 (17-May-2010)
主 superblock at 0, Group descriptors at 1-2
备份 superblock at 32768, Group descriptors at 32769-32770
备份 superblock at 98304, Group descriptors at 98305-98306
备份 superblock at 163840, Group descriptors at 163841-163842
备份 superblock at 229376, Group descriptors at 229377-229378
备份 superblock at 294912, Group descriptors at 294913-294914
备份 superblock at 819200, Group descriptors at 819201-819202
备份 superblock at 884736, Group descriptors at 884737-884738
备份 superblock at 1605632, Group descriptors at 1605633-1605634

我的分区大致是这个情况

我是linux初学者，不是很明白为什么不能修改Label……

Answer 1

http://blog.csdn.net/fei1700/article/details/3184547