MINT開機可以看到磁碟sda，但沒出現掛載選項
但開檔案總管抓不到，

硬碟dev/sda 1.8T，壞軌在2048-2049

fdisk -l dev/sda
Disk /dev/sda: 1.8 TiB, 2000398934016 bytes, 3907029168 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: 0x940f7bd9

所用裝置 可開機 Start 結束 磁區 Size Id 類型
/dev/sda1 2048 3907022847 3907020800 1.8T 83 Linux

一開始使用fsck -y /dev/sda1 修復

fsck 來自 util-linux 2.31.1
e2fsck 1.44.1 (24-Mar-2018)
fsck.ext2: 輸入/輸出錯誤 開啟 /dev/sda1 發生錯誤

The superblock could not be read or does not describe a valid ext2/ext3/ext4
filesystem. If the device is valid and it really contains an ext2/ext3/ext4
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
e2fsck -b 8193 <device>
or
e2fsck -b 32768 <device>

使用e2fsck修復
e2fsck -y /dev/sda
e2fsck 1.44.1 (24-Mar-2018)
ext2fs_open2: Bad magic number in super-block
e2fsck: Superblock invalid, trying backup blocks...
e2fsck: Bad magic number in super-block 開啟 /dev/sda 發生錯誤

The superblock could not be read or does not describe a valid ext2/ext3/ext4
filesystem. If the device is valid and it really contains an ext2/ext3/ext4
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
e2fsck -b 8193 <device>
or
e2fsck -b 32768 <device>

Found a dos partition table in /dev/sda

要怎樣抓到硬碟並備份裡面的資料？
SMART測試沒有錯誤

先用ddrescue備份出映像檔，再從中捉出資料呢？
https://darkranger.no-ip.org/content/how-to%EF%BC%9Alinux-%E8%B3%87%E6%96%99%E6%95%91%E6%8F%B4%E5%B7%A5%E5%85%B7