I created an EC2 amazon instance (ubuntu) and created a volume from an available snapshot. The volume has been successfully attached to my instance as /dev/sdf
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Complementing David Levesque answer.
You can check which volumes have been mounted with. The following will list them all:
$ sudo lsblk --output NAME,TYPE,SIZE,FSTYPE,MOUNTPOINT,LABEL
You will get something like that
NAME TYPE SIZE FSTYPE MOUNTPOINT LABEL
xvda disk 8G
└─xvda1 part 8G ext4 / cloudimg-rootfs
xvdf disk 30G
└─xvdf1 part 30G ext4 cloudimg-rootfs
Then you can mount it with
$ sudo mount /dev/xvdf1 /space -t ext4
I hope it helps