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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 <a href="#1">[1]</a></tt></td> <!-- Linux -->
		<td align="center" bgcolor="AntiqueWhite"><tt>Yes <a href="#2">[2]</a></tt></td> <!-- FreeBSD -->
		<td align="center" bgcolor="Azure"><tt>Yes <a href="#3">[3]</a></tt></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 <a href="#4">[4]</a></tt></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 <a href="#5">[5]</a></tt></td> <!-- Linux -->

		<td align="center" bgcolor="AntiqueWhite"><tt>Yes <a href="#6">[6]</a></tt></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 <a href="#7">[7]</a></tt></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 <a href="#8">[8]</a></tt></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 />
<strong><a name="4">4.</a></strong> Areca support on Linux added at 2008-07-24. Get 
<strong>current version</strong> from <a href="http://smartmontools.sourceforge.net/download.html#SVNInstall">SVN</a>. 
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 on 2009-01-14. 
Get <strong>current version</strong> from <a href="http://smartmontools.sourceforge.net/download.html#SVNInstall">SVN</a><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 at 2008-10-03. 
Get <strong>current version</strong> from <a href="http://smartmontools.sourceforge.net/download.html#SVNInstall">SVN</a><br />

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