diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6290e382e5..727e31afc5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 - Save the healthcheck **Check type** when it is the only change. Before, the "Save changes" bar did not open when you changed only the check type, for example from **Container command** back to **HTTP request**
 - Coolify Cloud: end a paid subscription that lost its link to Stripe when the customer cancels it. Before, it stayed active, and `cloud:sync-stripe-subscriptions` did not report it
 - Keep the dashboard proxy configuration of a server with the IP `host.docker.internal` that is not the default localhost server. Before, Coolify did not see this server as localhost after it saved the server, for example after a proxy restart, and deleted `coolify.yaml`, so the dashboard was not reachable at its domain ([#12444](https://github.com/coollabsio/coolify/issues/12444))
+- Show the disk usage of a server on the **Metrics** tab, on the **Fleet** page, and in the MCP `get_server_metrics` tool when Sentinel reports the Coolify data disk under a different mount point than `/`, `/data`, or `/data/coolify`. For example, this occurs on a NAS where `/data` is a symlink into a data volume. Before, the disk usage was always empty on these servers ([#12448](https://github.com/coollabsio/coolify/issues/12448))
 
 ## [v4.6.0] - 2026-11-02
 
diff --git a/app/Services/SentinelMetricsClient.php b/app/Services/SentinelMetricsClient.php
index 45bb91aeaf..c03dd7a85f 100644
--- a/app/Services/SentinelMetricsClient.php
+++ b/app/Services/SentinelMetricsClient.php
@@ -313,14 +313,19 @@ class SentinelMetricsClient
      * Sentinel runs in a container and reports only the disks of its own mounts:
      * 1.1.2 and older as `/app/db`, 1.1.3 and newer by host mount point, which is
      * `/data` or `/data/coolify` when that directory is on its own disk.
+     * Sentinel 1.1.3 names a disk by its shortest host mount point, which can be any
+     * path (for example `/home` when `/data` is a symlink into a NAS volume). When none
+     * of ROOT_MOUNTS is reported, the only reported disk is the one under Sentinel's
+     * `/app/db`; with several, the right one is unknown.
      *
      * @param  array<int, array<string, mixed>>  $rows
      */
     public static function rootMountName(array $rows): ?string
     {
-        $mounts = array_column($rows, 'mount');
+        $mounts = array_values(array_unique(array_column($rows, 'mount')));
 
-        return collect(self::ROOT_MOUNTS)->first(fn ($mount) => in_array($mount, $mounts, true));
+        return collect(self::ROOT_MOUNTS)->first(fn ($mount) => in_array($mount, $mounts, true))
+            ?? (count($mounts) === 1 ? $mounts[0] : null);
     }
 
     /**
@@ -352,13 +357,10 @@ class SentinelMetricsClient
             'memory', 'disk', 'load', 'network' => "/{$metric}/history",
             default => '/cpu/history',
         };
-        $query = self::historyQuery($range);
-        if ($metric === 'disk') {
-            // Sentinel 1.1.4+ returns only these mounts; older versions ignore the param.
-            $query['mount'] = implode(',', self::ROOT_MOUNTS);
-        }
 
-        return $this->url($path, $query);
+        // No `mount` filter for disk history: rootMountName() can pick a disk that is not in
+        // ROOT_MOUNTS, and Sentinel reports only the few disks of its own mounts.
+        return $this->url($path, self::historyQuery($range));
     }
 
     /**
diff --git a/tests/Feature/FleetMetricsPrefetchTest.php b/tests/Feature/FleetMetricsPrefetchTest.php
index fa3f6094fd..a4403f6eda 100644
--- a/tests/Feature/FleetMetricsPrefetchTest.php
+++ b/tests/Feature/FleetMetricsPrefetchTest.php
@@ -64,7 +64,7 @@ it('fetches the page metrics of every server in one SSH command each', function
     expect($commands)->toHaveCount(2)
         ->and($commands[0])->toContain('/api/summary', '/api/containers/current', '/api/load/history', '/api/network/history', '-H @-')
         ->and($commands[0])->toContain('/api/disk/history?from=')
-        ->and($commands[0])->toContain('mount=%2F%2C%2Fapp%2Fdb%2C%2Fdata%2Fcoolify%2C%2Fdata');
+        ->and($commands[0])->not->toContain('mount=');
 });
 
 it('does not fetch each metric again when the batch fails', function () {
diff --git a/tests/Unit/Metrics/HasMetricsMappingTest.php b/tests/Unit/Metrics/HasMetricsMappingTest.php
index e6c70be05b..65dc52265f 100644
--- a/tests/Unit/Metrics/HasMetricsMappingTest.php
+++ b/tests/Unit/Metrics/HasMetricsMappingTest.php
@@ -67,13 +67,26 @@ it('returns null for a metric when metrics are unavailable', function () {
     expect($d->getLoadMetrics(5))->toBeNull();
 });
 
-it('does not use non-root mounts when root disk samples are missing', function () {
+it('does not guess between several non-root mounts when root disk samples are missing', function () {
     $double = new MetricsMappingDouble;
-    $double->rowsByType['disk'] = [['time' => 1000, 'mount' => '/boot', 'usedPercent' => 90]];
+    $double->rowsByType['disk'] = [
+        ['time' => 1000, 'mount' => '/boot', 'usedPercent' => 90],
+        ['time' => 1000, 'mount' => '/home', 'usedPercent' => 20],
+    ];
 
     expect($double->getDiskMetrics(5))->toBe([]);
 });
 
+it('uses the only reported disk for disk metrics when it has another mount name', function () {
+    $double = new MetricsMappingDouble;
+    $double->rowsByType['disk'] = [
+        ['time' => 1000, 'mount' => '/home', 'usedPercent' => 19],
+        ['time' => 2000, 'mount' => '/home', 'usedPercent' => 20],
+    ];
+
+    expect($double->getDiskMetrics(5))->toBe([[1000, 19.0], [2000, 20.0]]);
+});
+
 it('uses the Sentinel data mount for disk metrics when no root mount is reported', function () {
     $double = new MetricsMappingDouble;
     $double->rowsByType['disk'] = [
diff --git a/tests/Unit/Services/SentinelMetricsClientTest.php b/tests/Unit/Services/SentinelMetricsClientTest.php
index c8c42286b0..ef2ffbaf56 100644
--- a/tests/Unit/Services/SentinelMetricsClientTest.php
+++ b/tests/Unit/Services/SentinelMetricsClientTest.php
@@ -172,15 +172,32 @@ it('rounds the range start to the minute so history responses are cacheable', fu
     Carbon::setTestNow();
 });
 
-it('does not substitute another mount when root disk history is absent', function () {
+it('does not guess between several other mounts when root disk history is absent', function () {
     $client = fakeMetricsClient();
     $client->bodies = ['/disk/history' => json_encode([
         ['time' => 1700000000000, 'mount' => '/boot', 'usedPercent' => 90],
+        ['time' => 1700000000000, 'mount' => '/home', 'usedPercent' => 20],
     ])];
 
     expect($client->history('disk', '24h'))->toBe([]);
 });
 
+it('uses the only reported disk when Sentinel names it by another host mount point', function () {
+    $client = fakeMetricsClient();
+    $client->bodies = [
+        '/summary' => json_encode(['disk' => [
+            ['mount' => '/home', 'used' => 19, 'total' => 100, 'usedPercent' => 19.02],
+        ]]),
+        '/disk/history' => json_encode([
+            ['time' => 1700000000000, 'mount' => '/home', 'usedPercent' => 19],
+            ['time' => 1700000300000, 'mount' => '/home', 'usedPercent' => 21],
+        ]),
+    ];
+
+    expect($client->summary()['diskPercent'])->toBe(19.02)
+        ->and($client->history('disk', '24h'))->toBe([[1699999800000, 19.0], [1700000100000, 21.0]]);
+});
+
 it('supports disk history without mount fields', function () {
     $client = fakeMetricsClient();
     $client->bodies = ['/disk/history' => json_encode([
@@ -190,10 +207,11 @@ it('supports disk history without mount fields', function () {
     expect($client->history('disk', '24h'))->toBe([[1699999800000, 40.0]]);
 });
 
-it('does not substitute another disk mount in the summary', function () {
+it('does not guess between several other disk mounts in the summary', function () {
     $client = fakeMetricsClient();
     $client->bodies = ['/summary' => json_encode(['disk' => [
         ['mount' => '/boot', 'used' => 90, 'total' => 100, 'usedPercent' => 90],
+        ['mount' => '/home', 'used' => 20, 'total' => 100, 'usedPercent' => 20],
     ]])];
 
     expect($client->summary()['diskPercent'])->toBeNull();