can't read superblock
1.查询device自动备份的节点
mkfs.ext4 -n device ####/dev/sda1
2.恢复节点
mkfs.ext4 -b superblocknum device ###/dev/sda1
外接设备superblock问题解决方案
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转载自blog.csdn.net/frank_ldw/article/details/80839170
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