Extra disk

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• Compute Engine - VM Instances
• Edit the VM where we would like to attach the disk "Additional disks"
• "Attach existing disk"

$ sudo lsblk
NAME   MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda      8:0    0  10G  0 disk
└─sda1   8:1    0  10G  0 part /
sdb      8:16   0  20G  0 disk

sudo mkfs.ext4 -m 0 -F -E lazy_itable_init=0,lazy_journal_init=0,discard /dev/sdb

Mount disk

sudo mkdir /mnt/data
sudo mount -o discard,defaults /dev/sdb /mnt/data
df -h

Add a file

sudo chmod a+w /mnt/data
touch /mnt/data/YOURNAME

sudo blkid /dev/sdb
/dev/sdb: UUID="51b624c7-81ad-4c17-849c-142908acff50" TYPE="ext4"

Edit /etc/fstab and add:

UUID=51b624c7-81ad-4c17-849c-142908acff50 /mnt/data ext4 discard,defaults,nofail 0 2

then you should be able to

sudo mount /mnt/data
sudo umount /mnt/data

• Compute Engine - Disks
• Read: Add persistant disk