[Oracle DataBase Server 12.2 Installation on Oracle Linux 7.4]: Preparing Hard Disks for Database Installation

The /u01 directory will store the database software, and the /u02 directory will store the database files.

# ls /dev/sd*

/dev/sda   /dev/sda2  /dev/sdc  /dev/sde  /dev/sdg
/dev/sda1  /dev/sdb   /dev/sdd  /dev/sdf  /dev/sdh

Create partitions on the available hard disks.

# fdisk /dev/sdb

# fdisk /dev/sdb

In short, the sequence: [n, p, 1, [Enter], [Enter], w]

Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x32ddb4e2.

Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-83886079, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-83886079, default 83886079):
Using default value 83886079
Partition 1 of type Linux and of size 40 GiB is set

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

Repeat for:

# fdisk /dev/sdc
# fdisk /dev/sdd

Create a filesystem on the created partitions.

# mkfs.ext4 /dev/sdb1
# mkfs.ext4 /dev/sdc1
# mkfs.ext4 /dev/sdd1

# mkdir /u01
# mkdir /u02
# mkdir /u03

Write information about where to mount partitions when the operating system boots.

# cp /etc/fstab /etc/fstab.bkp.$(date +%Y-%m-%d)
# echo "/dev/sdb1 /u01 ext4 defaults 1 2" >> /etc/fstab
# echo "/dev/sdc1 /u02 ext4 defaults 1 2" >> /etc/fstab
# echo "/dev/sdd1 /u03 ext4 defaults 1 2" >> /etc/fstab

# mount /u01
# mount /u02
# mount /u03

Verification

# mount | grep sdb1
# mount | grep sdc1
# mount | grep sdd1