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<h3>Checking disks behind RAID controllers</h3>

<p>RAID controllers typically simulate a (logical) disk for each array of (physical) 
disks to the OS. Access to SMART functionality relies on ATA or SCSI pass through 
I/O controls providing direct access to each physical disk. 
But the standard I/O controls available are usually not designed to make 
this distinction between logical and physical disks. Therefore, smartmontools 
has to use vendor specific I/O controls. Support for disks behind RAID 
controllers is highly dependent on both platform and controller type.</p>

<table border="1" cellpadding="5" cellspacing="2">
	<tr>
		<th rowspan="2" bgcolor="Lavender">RAID-Controller</th>
		<th rowspan="2" bgcolor="Lavender">Directive</th>
		<th colspan="3" bgcolor="Lavender">Supported in OS</th>

	</tr>
	<tr>
		<th bgcolor="Azure">Linux</th>
		<th bgcolor="AntiqueWhite">FreeBSD</th>
		<th bgcolor="Azure">MS-Windows</th>
	</tr>
	<tr>

		<td><tt>3ware SATA RAID controller</tt></td>
		<td><tt>-d 3ware,N</tt></td>
		<td align="center" bgcolor="Azure"><tt>Yes</tt> <font size="-1"><sup><a href="#1">1</a></sup></font></td> <!-- Linux -->
		<td align="center" bgcolor="AntiqueWhite"><tt>Yes</tt> <font size="-1"><sup><a href="#2">2</a></sup></font></td> <!-- FreeBSD -->
		<td align="center" bgcolor="Azure"><tt>Yes</tt> <font size="-1"><sup><a href="#3">3</a></sup></font></td> <!-- MS-Windows -->

	</tr>
	<tr>
		<td><tt>Areca SATA RAID controller</tt></td>
		<td><tt>-d areca,N</tt></td>
		<td align="center" bgcolor="Azure"><tt>Yes</tt> <font size="-1"><sup><a href="#4">4</a></sup></font></td> <!-- Linux -->
		<td align="center" bgcolor="AntiqueWhite"><tt>No</tt></td> <!-- FreeBSD -->

		<td align="center" bgcolor="Azure"><tt>No</tt></td> <!-- MS-Windows -->
	</tr>
	<tr>
		<td><tt>HighPoint RocketRAID SATA RAID controller</tt></td>
		<td><tt>-d hpt,L/M/N</tt></td>
		<td align="center" bgcolor="Azure"><tt>Yes</tt> <font size="-1"><sup><a href="#5">5</a></sup></font></td> <!-- Linux -->

		<td align="center" bgcolor="AntiqueWhite"><tt>Yes</tt> <font size="-1"><sup><a href="#6">6</a></sup></font></td> <!-- FreeBSD -->
		<td align="center" bgcolor="Azure"><tt>No</tt></td> <!-- MS-Windows -->
	</tr>
	<tr>
		<td><tt>CCISS (HP/Compaq Smart Array Controller)</tt></td>
		<td><tt>-d cciss,N</tt></td>

		<td align="center" bgcolor="Azure"><tt>Yes</tt> <font size="-1"><sup><a href="#7">7</a></sup></font></td> <!-- Linux -->
		<td align="center" bgcolor="AntiqueWhite"><tt>Yes</tt></td> <!-- FreeBSD -->
		<td align="center" bgcolor="Azure"><tt>No</tt></td> <!-- MS-Windows -->
	</tr>
	<tr>

		<td><tt>LSI MegaRAID SAS RAID controller</tt></td>
		<td><tt>-d megaraid,N</tt></td>
		<td align="center" bgcolor="Azure"><tt>Yes</tt> <font size="-1"><sup><a href="#8">8</a></sup></font></td> <!-- Linux -->
		<td align="center" bgcolor="AntiqueWhite"><tt>No</tt></td> <!-- FreeBSD -->
		<td align="center" bgcolor="Azure"><tt>No</tt></td> <!-- MS-Windows -->

	</tr>

</table>

<p>See the notes below and the <b><a href="http://sourceforge.net/browser/trunk/smartmontools/INSTALL">INSTALL</a></b>
file for information about kernel and driver requirements on your platform. Also consult 
the <a href="http://smartmontools.sourceforge.net/doc.html#man-pages">man pages</a> for controller specific smartmontools options or
directives.</p>
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<h4>Notes:</h4>

<strong><a name="1">1.</a></strong> 3ware RAID controllers are supported on Linux 
since smartmontools release 5.1-18. Support for char devices /dev/tw* was added in release 5.33.<br />
<strong><a name="2">2.</a></strong> 3ware support on FreeBSD is available since release 5.33, 
multiple controller and char device support was added in release 5.36.<br />
<strong><a name="3">3.</a></strong> 3ware 9000 series only (added in release 5.37), 
requires Windows driver 9.4.0 or later. For older controllers, smartctl and smartd provide 
limited SMART support through tw_cli tool, see man page. <br />
News: smartmontools was tested with 9500S and Windows driver 9.4.1. This 
should also work with 9550SX/U, 9590SE, and 9650SE Series. But there was 
not much feedback since then. 3ware did never document the 
new I/O-controls for SMART support in their driver release notes.<br />
<strong><a name="4">4.</a></strong> Areca support on Linux added in release 5.39. 
The Areca controller must have firmware version 1.46 or later. Earlier versions will 
not return SMART information but will instead produce (harmless) SCSI error messages.<br />
<strong><a name="5">5.</a></strong> HighPoint RocketRAID support for Linux was added in release 5.37.<br />
<strong><a name="6">6.</a></strong> HighPoint RocketRAID support for FreeBSD was added in release 5.39.<br /> 
<strong><a name="7">7.</a></strong> CCISS (Compaq Smart Array Controller) support for Linux was added in release 5.37.<br />
<strong><a name="8">8.</a></strong> Support for LSI MegaRAID controller on Linux was added in release 5.39.<br />

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