Proxmox VE Cluster Setup With iSCSI SAN Storage and Multipath

Adding a Storage Area Network (SAN) to a Proxmox VE cluster improves storage performance, scalability, and resilience. A SAN provides block-level storage over dedicated networks, so virtual machines can use it as if it were attached locally. In enterprise environments, combining the SAN with Multipath I/O adds redundancy and spreads the load across several network paths.

Updated September 2026 · Mr.PlanB

Proxmox oVirt Backup Strategy

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Overview

These steps set up iSCSI SAN with Multipath in a Proxmox cluster:

1. Install required packages

On every Proxmox node, install the multipath tools by running apt update and then apt install multipath-tools. 2. Configure Multipath

Create or edit the configuration file under /etc/multipath/conf.d/ and define the settings you need. Add the storage device's WWID to /etc/multipath/wwids so the device is identified correctly. 3. Restart and verify

Restart the service with systemctl restart multipath-tools.service, then check the configuration with multipath -ll. 4. Partition and create LVM

Partition the multipath device (for example /dev/mapper/mpatha), initialize it as a physical volume, and create a volume group for shared storage. 5. Add shared storage in Proxmox

In the Proxmox web interface, go to Datacenter → Storage → Add → LVM, select the volume group you created, and finish the configuration. 6. Test the setup

Create a test VM or disk to confirm that the storage works.

With Multipath, storage stays reachable even if one network path fails, so services keep running. A SAN improves availability and performance, but you still need an external backup strategy for complete data protection.

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