How to Deploy macOS Xsan and Quantum StorNext Topologies via Profile Manager

In high-end video production, rendering, and scientific computing environments, direct-attached storage is insufficient, and standard NAS (Network Attached Storage) lacks the throughput required for simultaneous 8K video editing. The enterprise solution is a SAN (Storage Area Network) running a clustered file system. Apple’s native clustered file system is Xsan, which is fully interoperable with Quantum’s StorNext technology.

Historically, Xsan was managed via the macOS Server application. However, Apple deprecated macOS Server, shifting the configuration and deployment of Xsan topologies entirely to Mobile Device Management (MDM). This guide explains how to architect and deploy Xsan profiles via Apple Profile Manager (or any modern MDM) to seamlessly connect macOS client nodes to a StorNext/Xsan cluster.

The Architecture of an Xsan/StorNext Cluster

A clustered file system operates differently than standard network storage (like SMB or NFS). In an Xsan environment:

1. Fibre Channel / iSCSI Data Path: The macOS client mounts the storage LUNs (Logical Unit Numbers) directly via Fibre Channel or iSCSI, treating them as local block storage. This provides massive, low-latency bandwidth.
2. Metadata Network (MDC): Multiple clients cannot write to the same block storage simultaneously without corrupting the file system. Therefore, an out-of-band Ethernet network connects all clients to the Metadata Controllers (MDCs). When a Mac wants to write a file, it asks the MDC for permission and block allocation; it then writes the data directly over Fibre Channel.

To connect a macOS client to this cluster, the client must be configured with the IP addresses of the MDCs, the name of the Xsan volume, and the cryptographic shared secret used to authenticate to the cluster.

Step 1: Gathering the Xsan Cluster Configuration

Before creating the deployment profile, you must extract the connection parameters from your existing Xsan or Quantum StorNext Metadata Controller.

You require three pieces of information:

• The Xsan Volume Name: e.g., Video_Production_Vol.
• The MDC IP Addresses: The dedicated Ethernet IPs of your primary and standby Metadata Controllers (e.g., 10.0.10.10 and 10.0.10.11).
• The Shared Secret (fsnameservers): The cryptographic hash used for client authentication. On a running MDC, this can usually be extracted from /Library/Preferences/Xsan/fsnameservers or the Quantum GUI.

Step 2: Structuring the Mobileconfig Payload

Because the macOS Server app is dead, configuring Xsan directly in System Settings is no longer possible. You must push an XML .mobileconfig file containing the com.apple.xsan payload.

Below is the exact XML structure required for an Xsan configuration profile. You can generate this using Profile Manager, Apple Configurator, or by writing it manually in a text editor.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>PayloadContent</key>
    <array>
        <dict>
            <key>PayloadType</key>
            <string>com.apple.xsan</string>
            <key>PayloadVersion</key>
            <integer>1</integer>
            <key>PayloadIdentifier</key>
            <string>com.corp.xsan.config</string>
            <key>PayloadUUID</key>
            <string>A1B2C3D4-E5F6-7890-ABCD-EF1234567890</string>
            <key>sanName</key>
            <string>Video_Production_Vol</string>
            <key>fsnameservers</key>
            <array>
                <string>10.0.10.10</string>
                <string>10.0.10.11</string>
            </array>
            <key>sharedSecret</key>
            <string>YourCryptographicSharedSecretHere</string>
        </dict>
    </array>
    <key>PayloadDisplayName</key>
    <string>Xsan Cluster Configuration</string>
    <key>PayloadIdentifier</key>
    <string>com.corp.xsan.profile</string>
    <key>PayloadType</key>
    <string>Configuration</string>
    <key>PayloadUUID</key>
    <string>09876543-21FE-DCBA-0987-654321ABCDEF</string>
    <key>PayloadVersion</key>
    <integer>1</integer>
</dict>
</plist>

Save this file as XsanConfig.mobileconfig.

Step 3: Deploying the Profile via MDM

Xsan configurations are system-level profiles, meaning they must be deployed to the device, not the user.

1. Upload the XsanConfig.mobileconfig file to your chosen MDM (Profile Manager, Jamf Pro, Kandji, etc.) as a Custom Payload.
2. Assign the payload to your high-performance macOS workstations (e.g., Mac Studios or Mac Pros).
3. Push the profile.

Once the macOS client receives the profile, the native Xsan daemon (xsand) will automatically start, parse the IPs and secrets, and attempt to contact the Metadata Controllers on the specified Ethernet network.

Step 4: Verifying the Xsan Mount in Terminal

When the daemon authenticates successfully, and assuming the Fibre Channel (or iSCSI) block storage LUNs are physically visible to the Mac, macOS will automatically mount the clustered file system.

You can verify the connection status and volume health using the xsanctl command-line utility.

sudo xsanctl list

This will list all configured SANs and their active/standby MDCs.

To view the mounted volume and its storage capacity, use the cvadmin utility (the native Quantum StorNext CLI built into macOS):

sudo cvadmin -e "show"

You should see the Video_Production_Vol listed as active, with its block allocation maps and stripe groups fully visible to the macOS client.

Conclusion

The deprecation of the macOS Server application did not signal the death of Xsan; it simply modernized its deployment methodology. By leveraging XML configuration profiles and standard MDM delivery, system administrators can programmatically provision hundreds of macOS clients into highly complex Quantum StorNext clustered file systems with absolute zero-touch efficiency.