If our EC2 server are giving the below error:-
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,1)
Root caused:-
Amazon EBS-backed
• Device not attached correctly.
• Root device not attached at correct device point.
• Filesystem not in expected format.
• Use of legacy kernel (such as 2.6.16-XenU).
• A recent kernel update on your instance (faulty update, or an update bug)
Instance store-backed
• Hardware device failure.
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,1)
Root caused:-
Amazon EBS-backed
• Device not attached correctly.
• Root device not attached at correct device point.
• Filesystem not in expected format.
• Use of legacy kernel (such as 2.6.16-XenU).
• A recent kernel update on your instance (faulty update, or an update bug)
Instance store-backed
• Hardware device failure.
Solution:-
A. If server is Amazon EBS-backed:-
• Stop and then restart the instance.
• Modify root volume to attach at the correct
device point, possible /dev/sda1 instead of /
dev/sda.
• Stop and modify to use modern kernel.
• Refer to the documentation for your Linux
distribution to check for known update bugs.
Change or reinstall the kernel.
B. If server is Instance store-backed:-
Terminate the instance and launch a new instance
using a modern kernel.
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