Add note about SMART and HBA

Signed-off-by: Volker Theile <[email protected]>

administration/storage/smart.rst

@@ -7,6 +7,12 @@ There are several tools for accessing those attributes. |omv| reads and monitors
 
 Notifications are integrated with smartmontools. Changes in S.M.A.R.T values are reported via mail.
 
+.. note::
+
+    Please note that SMART is not supported by |omv| for disks that are
+    assembled as a RAID via HBA. |omv| only supports SMART for those
+    disks that are connected to an HBA in pass-through mode.
+
 General
 -------
 
@@ -18,8 +24,6 @@ Devices
 -------
 The grid displays all current block devices in the system with SMART capabilities. From this grid by selecting a drive you can configure if you want smartmontools to watch and inform for any SMART attributes changes during uptime using the edit button.
 
-Smartmontools is configured in this file :file:`/etc/smartd.conf`.
-
 The information button displays several tabs which provide friendly parsed information about the drive. The last tab has all the information in raw text.
 
 The grid columns shows different identification values for the drive, the last one (Status) reports a green icon if drive is in good condition or red if drive needs some attention, if you hover on the icon a tooltip that will report more details. The code that reports the red icon is based on this function `here <https://github.com/openmediavault/openmediavault/blob/9ddc8b66f3f666987157a0e7b84d57e7c10f9ba4/deb/openmediavault/usr/share/php/openmediavault/system/storage/smartinformation.inc#L93-L98>`_ and `here <https://github.com/openmediavault/openmediavault/blob/9ddc8b66f3f666987157a0e7b84d57e7c10f9ba4/deb/openmediavault/usr/share/php/openmediavault/system/storage/smartinformation.inc#L235-L262>`_, so basically the red icon will be triggered only on attributes with the prefailure (P) flag when: