First step add block volume through console with appropriate size as dev full path.
Example in this case - /dev/oracleoci/oraclevdb
## Add volume as /dev/oracleoci/oraclevdb
[opc@oci-instance dev]$ cd oracleoci
[opc@oci-instance oracleoci]$ ls -lrt
total 0
lrwxrwxrwx. 1 root root 6 Jun 4 19:30 oraclevda -> ../sda
lrwxrwxrwx. 1 root root 7 Jun 4 19:30 oraclevda3 -> ../sda3
lrwxrwxrwx. 1 root root 7 Jun 4 19:30 oraclevda2 -> ../sda2
lrwxrwxrwx. 1 root root 7 Jun 4 19:30 oraclevda1 -> ../sda1
#### Run ICSCI command ####
[opc@oci-instance oracleoci]
sudo iscsiadm -m node -o new -T iqn.2015-12.com.oracleiaas:2c5b982e-acac-4c0c-a25a-5419ec4195ca -p 169.254.2.2:3260
sudo iscsiadm -m node -o update -T iqn.2015-12.com.oracleiaas:2c5b982e-acac-4c0c-a25a-5419ec4195ca -n node.startup -v automatic
sudo iscsiadm -m node -T iqn.2015-12.com.oracleiaas:2c5b982e-acac-4c0c-a25a-5419ec4195ca -p 169.254.2.2:3260 -l
[opc@oci-instance oracleoci]$
[opc@oci-instance oracleoci]$ ls -lrt
total 0
lrwxrwxrwx. 1 root root 6 Jun 4 19:30 oraclevda -> ../sda
lrwxrwxrwx. 1 root root 7 Jun 4 19:30 oraclevda3 -> ../sda3
lrwxrwxrwx. 1 root root 7 Jun 4 19:30 oraclevda2 -> ../sda2
lrwxrwxrwx. 1 root root 7 Jun 4 19:30 oraclevda1 -> ../sda1
lrwxrwxrwx. 1 root root 6 Jun 18 16:31 oraclevdb -> ../sdb
#### Add entry in /etc/fstab to lost volume during reboot
[opc@oci-instance oracleoci]$ cat /etc/fstab
## More information:
## https://docs.us-phoenix-1.oraclecloud.com/Content/Block/Tasks/connectingtoavolume.htm
/dev/oracleoci/oraclevdb /u01 ext4 defaults,_netdev,nofail 0 0
### Make ext4 filesystem
[opc@oci-instance dev]$ sudo mkfs -t ext4 /dev/sdb
mke2fs 1.42.9 (28-Dec-2013)
/dev/sdb is entire device, not just one partition!
Proceed anyway? (y,n) y
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=256 blocks
49152000 inodes, 196608000 blocks
9830400 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2344615936
6000 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
102400000
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
[opc@oci-instance dev]$
###### mount /u01
[opc@oci-instance dev]$ sudo mkdir /u01
[opc@oci-instance dev]$ sudo mount /dev/sdb /u01
[opc@oci-instance dev]$
[opc@oci-instance dev]$ df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 158G 0 158G 0% /dev
tmpfs 158G 0 158G 0% /dev/shm
tmpfs 158G 49M 158G 1% /run
tmpfs 158G 0 158G 0% /sys/fs/cgroup
/dev/sda3 39G 2.9G 36G 8% /
/dev/sda1 200M 9.7M 191M 5% /boot/efi
tmpfs 32G 0 32G 0% /run/user/995
tmpfs 32G 0 32G 0% /run/user/1000
/dev/sdb 739G 73M 701G 1% /u01