Find storage name either from the server with lsblk;
ubuntu@3d-build:~$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 10G 0 disk
|-sda1 8:1 0 9.9G 0 part /
|-sda14 8:14 0 4M 0 part
`-sda15 8:15 0 106M 0 part /boot/efi
sdb 8:16 0 10G 0 disk
Or via openstack volume list.
For lsblk the last line is the important one.
Lets make a file system on that storage (important - do this ONLY ONCE!).
ubuntu@3d-build:~$ sudo mkfs.ext4 /dev/sdb
mke2fs 1.43.5 (04-Aug-2017)
Discarding device blocks: done
Creating filesystem with 2621440 4k blocks and 655360 inodes
Filesystem UUID: b95fd2ba-6922-41bd-b149-20babb64191b
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632
Allocating group tables: done
Writing inode tables: done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: done
Now we have a file system, but we cannot see it (try e.g. df). We must mount it:
ubuntu@3d-build:~$ sudo mkdir -p /testVolum
ubuntu@3d-build:~$ sudo mount /dev/sdb /testVolum
ubuntu@3d-build:~$ df
Filesystem 1K-blocks Used Available Use% Mounted on
udev 1012480 0 1012480 0% /dev
tmpfs 204164 21052 183112 11% /run
/dev/sda1 9983232 1340704 8626144 14% /
tmpfs 1020808 0 1020808 0% /dev/shm
tmpfs 5120 0 5120 0% /run/lock
tmpfs 1020808 0 1020808 0% /sys/fs/cgroup
/dev/sda15 106858 3405 103454 4% /boot/efi
tmpfs 204160 0 204160 0% /run/user/1000
/dev/sdb 10255636 36888 9678076 1% /testVolum
ubuntu@3d-build:~$ df -h /testVolum
Filesystem Size Used Avail Use% Mounted on
/dev/sdb 9.8G 37M 9.3G 1% /testVolum
Your file area is ready for use.
Test via touch /testVolum/GotDisk.
After unmounting, the file area can later be detached:
umount /testVolum
openstack server remove volume 3d-build mittTestVolum
Make a new machine (CLI or GUI) and mount this disk on that machine.