[Bug?] SR_SOURCE_SPACE_INSUFFICIENT - Are the space requirements for HA out of date?

[jr-m4]

Next step in our lab testing was going to be to enable HA. For this we chose to go with a 500MB Fibre Channel LUN.

• According to the docs, the minimum requirements are 356MB. https://xcp-ng.org/blog/2024/08/22/xcp-ng-high-availability-a-guide/

However, when I try to enable HA I will find an error in the logs saying SR_SOURCE_SPACE_INSUFFICIENT. (Full log down below).

So my question then becomes. Are the docs out of date, or could this possibly be something else under the hood?
Note: I'm currently waiting on the storage guy to expand the SR to 1GB.

XO CE: 5811d
Node: 24
Pool: Fully updated with latest patches as of may 26, 2026

pool.enableHa
{
  "pool": "37e7a3b9-8c45-c7f2-7d09-249a935dd33d",
  "heartbeatSrs": [
    "3efef95a-4594-5a36-a182-f2b039d51ffa"
  ],
  "configuration": {}
}
{
  "code": "SR_SOURCE_SPACE_INSUFFICIENT",
  "params": [
    "OpaqueRef:601b3d23-c211-b853-0a9a-2c12e16a6567"
  ],
  "call": {
    "duration": 21,
    "method": "pool.enable_ha",
    "params": [
      "* session id *",
      [
        "OpaqueRef:601b3d23-c211-b853-0a9a-2c12e16a6567"
      ],
      {}
    ]
  },
  "message": "SR_SOURCE_SPACE_INSUFFICIENT(OpaqueRef:601b3d23-c211-b853-0a9a-2c12e16a6567)",
  "name": "XapiError",
  "stack": "XapiError: SR_SOURCE_SPACE_INSUFFICIENT(OpaqueRef:601b3d23-c211-b853-0a9a-2c12e16a6567)
    at XapiError.wrap (file:///opt/xen-orchestra/packages/xen-api/_XapiError.mjs:16:12)
    at file:///opt/xen-orchestra/packages/xen-api/transports/json-rpc.mjs:38:21
    at runNextTicks (node:internal/process/task_queues:65:5)
    at processImmediate (node:internal/timers:472:9)"
}

[jr-m4]

Update:

We just expanded the SR to 2GB. And I'm still getting the same error.

Write permissions were verified by creating a vdi on the SR. And that was successfull with no problem.