How to connect NAS to CentOS via iSCSI protocol

Connect CentOS server to the internet (in case of no internet, you will have download the rpms and upload them on CentOS manually)

• Install Epel repository:

# yum install epel-release

• Install ISCSi-initiator utils:

# yum install iscsi-initiator-utils

• If you using CHAP authentification - edit /etc/iscsi/iscsid.conf (for example, using vi)
  Uncomment next strings and add login/password:

node.session.auth.authmethod = CHAP
node.session.auth.username = admin
node.session.auth.password = 123456

• Add service in auto-boot and start it:

# systemctl enable iscsid
# systemctl start iscsid

• Search ISCSi-targets

# iscsiadm -m discovery -t sendtargets -p 192.168.0.1

(where 192.168.0.1 - ISCSi-target IP address)

• Connect to ISCSi-target

# iscsiadm -m node --login

• Check new disk in system

# lsblk

• Mark-up a new disk:

# parted /dev/{} mktable gpt
(where {} - your disk)
# parted /dev/{} mkpart --primary ext4 1M -1
# mkfs.ext4 -F -L TrassirArchive /dev/{}

• Check UUID of new disk

# blkid

• Create a new folder in /media:

# mkdir /media/[Foldername] && sudo chmod 777 /media/[Foldername]

For example, [Foldername] can be TrassirArchive4

• Mount new disk in /media/[Foldername]
  

# mount /dev/{} /media/[Foldername]

• Add a new disk in /etc/fstab (as a new string) (use vi, for example)

UUID=XXXXX /media/Foldername ext4 _netdev,x-systemd.after=iscsi.service 0 0 (where XXXXX - UUID)

• Disable archive writing in /media/[Foldername]
  

# chattr +i -VR /media/[Foldername]