Tuesday, 30 April 2019

How to resolve General error mounting filesystems (Failed mount) issue of EC2 by Raj Gupta

If our EC2 server are giving error like below :-



General error mounting filesystems. 

 Root caused:-

Amazon EBS-backed

• Detached or failed Amazon EBS volume.
• Corrupted filesystem.
• Mismatched ramdisk and AMI combination (such as Debian ramdisk with a SUSE AMI).

Instance store-backed:-

• A failed drive.
• A corrupted file system.
• A mismatched ramdisk and combination (for example, a Debian ramdisk with a SUSE AMI).


Solution:- 

A.  If server is Amazon EBS-backed:-

Use the following procedure: 

1. Stop the instance. 
2. Detach the root volume. 
3. Attach the root volume to a known working instance.
4. Run filesystem check (fsck –a /dev/...). 
5. Fix any errors. 
6. Detach the volume from the known working instance. 
7. Attach the volume to the stopped instance. 
8. Start the instance. 
9. Recheck the instance status. 

B. If server is Instance store-backed:-

• Start a new instance.
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