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无法读取虚拟服务器上的超级块

tag-icon • tag-icon linux filesystems ubuntu-14.10
无法读取虚拟服务器上的超级块

启动 ubuntu 14.10 后我得到了这样的日志输出

[1377286.486802] EXT4-fs（sda2）：无法读取超级块

我可以登录并使用机器，但我猜有些地方不对劲。

使用 fdisk、dumpe2fs 和 e2fsck 进行了一些诊断。

这有多糟糕？应该/可以做什么？

sudo fdisk -l

Disk /dev/sda: 16 GiB, 17179869184 bytes, 33554432 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x71f43c62

Device     Boot  Start      End  Sectors  Size Id Type
/dev/sda1  *      2048   499711   497664  243M 83 Linux
/dev/sda2       501758 33552383 33050626 15.8G  5 Extended
/dev/sda5       501760 33552383 33050624 15.8G 8e Linux LVM

Disk /dev/mapper/Ubuntu--vg-root: 11.8 GiB, 12624855040 bytes, 24657920 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/Ubuntu--vg-swap_1: 4 GiB, 4294967296 bytes, 8388608 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

sudo dumpe2fs /dev/sda2

dumpe2fs 1.42.10 (18-May-2014)
dumpe2fs: Attempt to read block from filesystem resulted in short read while trying to open /dev/sda2
Couldn't find valid filesystem superblock.

sudo e2fsck -f /dev/sda2

e2fsck 1.42.10 (18-May-2014)
e2fsck: Attempt to read block from filesystem resulted in short read while trying to open /dev/sda2

Could this be a zero-length partition?

答案1

嗯，是的，您正在尝试挂载扩展分区，但结果肯定不会好 —— 该分区上没有文件系统。您想挂载哪个分区？

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