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我試圖從EC2實例安裝主要的/ dev/sda1的volumen，到一個新的，但我有這些問題：EC2實例，裝配卷DOS/MBR引導扇區
$ sudo mount -t ext4 /dev/xvdg /mnt/xvdg/
mount: wrong fs type, bad option, bad superblock on /dev/xvdg,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
從dmesg的信息：
$ dmesg | tail
[ 673.481965] xvdg: xvdg1
[ 673.589140] xvdg: xvdg1
[ 673.711554] xvdg: xvdg1
[ 673.802113] xvdg: xvdg1
[ 673.872627] xvdg: xvdg1
[ 673.978105] xvdg: xvdg1
[10382.432880] EXT4-fs (xvdg): VFS: Can't find ext4 filesystem
更多信息：
$ sudo fdisk -l /dev/xvdg
Disk /dev/xvdg: 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: 0x00000000
Device Boot Start End Sectors Size Id Type
/dev/xvdg1 * 16065 33543719 33527655 16G 83 Linux
Looking for more info, got to this link
我也跟着these steps來修復一個破損的Ext4超級塊。但它不起作用。