Shulou(Shulou.com)06/03 Report--

How to fix Linux server disk bad sectors? In response to this problem, today's Xiaobian summarizes this article about disk repair, hoping to help more friends who want to solve this problem find a simpler and easier way.

I. Process

1, disk bad track check

After the problem occurred, the business was stopped first, and then the disk was unloaded for repair. This problem may be caused by bad tracks on the disk. I first checked the bad track of the disk.

badblocks -sv /dev/sdb

Almost checked for some time, found that there is no bad road.

2. Repair disk file system

When repairing the file system, it is found that it cannot be repaired, and the Superblock invalid is displayed.

[root@ad4 ~]# fsck -t ext4 /dev/sdb

fsck from util-linux-ng 2.17.2

e2fsck 1.41.12 (17-May-2010)

fsck.ext4: Superblock invalid, trying backup blocks...

fsck.ext4: Bad magic number in super-block while trying to open /dev/sdb

The superblock could not be read or does not describe a correct ext2

filesystem. If the device is valid and it really contains an ext2

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

3. View file system backup Superblock

[root@ad4 ~]# mke2fs -n /dev/sdb

mke2fs 1.41.12 (17-May-2010)

/dev/sdb is entire device, not just one partition!

Proceed anyway? (y,n) y

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

Stride=1 blocks, Stripe width=0 blocks

122093568 inodes, 488364854 blocks

24418242 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=4294967296

14904 block groups

32768 blocks per group, 32768 fragments per group

8192 inodes per group

Superblock backups stored on blocks:

32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,

4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,

102400000, 214990848

4. Repair file system

e2fsck -b 214990848 -y /dev/sdb

There are a lot of things to fix, and the fix is successful.

After reading this article, have you learned how to fix bad disk sectors on Linux servers? If you still want to learn more skills or want to know more related content, welcome to pay attention to the industry information channel, thank you for reading!

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