📦 Synology NAS¶

The Synology NAS provides iSCSI storage that is integrated with the Proxmox Backup Server.
This storage is identified as pve-2_iscsi_storage and is shared across all Proxmox nodes, ensuring centralized, resilient backup storage.

🔄 Updating Synology¶

Synology devices are updated through the web GUI:

1. Navigate to https://synology.refol.us.
2. Open Control Panel → Update & Restore.
3. The interface will indicate whether an update is available.

⚠️ Important: Before applying updates, log out of all active iSCSI sessions to prevent data corruption. For example, the iSCSI session used by the Proxmox Backup Server must be disconnected.

🛑 Logging Out of iSCSI Sessions¶

From the pve-2 terminal, log out of the active iSCSI session:

sudo iscsiadm -m node --logout -T iqn.2000-01.com.synology:synology-0.Target-1.76fd697e949

🔁 Restoring iSCSI Sessions After Update¶

Once the update is complete, restore the iSCSI session:

sudo iscsiadm -m node --targetname iqn.2000-01.com.synology:synology-0.Target-1.76fd697e949 --portal 192.168.2.240 --login

✅ Verifying iSCSI Session Status¶

Confirm that the iSCSI session is active:

sudo iscsiadm --mode session --print=1

Expected output:

Target: iqn.2000-01.com.synology:synology-0.Target-1.76fd697e949 (non-flash)
        Current Portal: 192.168.2.240:3260,1
        Persistent Portal: 192.168.2.240:3260,1
                **********
                Interface:
                **********
                Iface Name: default
                Iface Transport: tcp
                Iface Initiatorname: iqn.1993-08.org.debian:01:6865e8684bf6
                Iface IPaddress: 192.168.2.202
                Iface HWaddress: default
                Iface Netdev: default
                SID: 2
                iSCSI Connection State: LOGGED IN
                iSCSI Session State: LOGGED_IN
                Internal iscsid Session State: NO CHANGE

📂 Mounting the iSCSI Drive¶

Finally, mount the iSCSI drive to make the backup datastore available:

sudo mount /mnt/datastore/backups/

✅ Summary¶

This workflow ensures safe updates to the Synology NAS while maintaining reliable iSCSI connectivity for the Proxmox Backup Server:

• Pre‑update: Log out of iSCSI sessions.
• Post‑update: Restore sessions and verify connectivity.
• Final step: Mount the datastore for backup operations.