how to make an attached EBS volume accessible?

Question

I changed my instance type, and now previously attached volumes are not available at startup. How do I attach and mount volumes?

In the volume info in the AWS console:

Attachment information i-e85c62d0 (hongse):/dev/sdf (attached)

however there is nothing at /dev/sdf on the instance.

I tried to mount it following the info on the AWS site such as:

ubuntu@hongse:~$ sudo mkdir /ebs1
ubuntu@hongse:~$ sudo mount /dev/sdf /ebs1
mount: special device /dev/sdf does not exist

but failed.

What other steps could I try to mount an existing volume?

Answer 1

Ok, you're using ubuntu in AWS with an ECS volume. Try this:

ubuntu@hostname1:~$ lsblk
NAME    MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
xvda    202:0    0   128G  0 disk 
└─xvda1 202:1    0   128G  0 part /
xvdf    202:80   0  1000G  0 disk 

Note that xvdf (1TB) drive is not mounted in my example. You will want to type the following to mount your disk:

ubuntu@hostname1:~$ sudo mount /dev/xvdf /ebs1

NOTE: I don't know the reason why the AWS console shows /dev/sdf and the actual host shows /dev/xvdf, but that's the way it is.