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Linux server disk bad discovery and resolution process is how, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something.

The disk of the server is not monitored, in fact, I do not know how to monitor the status of the disk, suddenly can not see the new data, went up to take a look at the disk, found that the disk is read-only, unable to write data.

I. processing process

1. Check the bad track of disk

After the problem, first stop the business, and then uninstall the disk to repair, this problem may be that the track of the disk has a bad area, I first checked the bad track of the disk.

Badblocks-sv / dev/sdb

After almost checking for some time, it was found that there was no bad way.

2. Repair the disk file system

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

[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? (YBM 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 the file system

E2fsck-b 214990848-y / dev/sdb

There was a lot of repair, and it took a while to fix it.

After the repair is completed, install it into the directory and view it as follows

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