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<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xml:lang="en" lang="en" xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html;charset=utf-8" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <!-- MOTW-DISABLED saved from url=(0014)about:internet --> <meta name="keywords" /> <title>Controller Settings for Nytro Cache Drive</title> <link rel="StyleSheet" href="css/v7720452.css" type="text/css" media="all" /> <link rel="StyleSheet" href="css/webworks.css" type="text/css" media="all" /> <script type="text/javascript" language="JavaScript1.2" src="wwhdata/common/context.js"></script> <script type="text/javascript" language="JavaScript1.2" src="wwhdata/common/towwhdir.js"></script> <script type="text/javascript" language="JavaScript1.2" src="wwhdata/common/wwhpagef.js"></script> <script type="text/javascript" language="JavaScript1.2"> <!-- var WebWorksRootPath = ""; // --> </script> <script type="text/javascript" language="JavaScript1.2"> <!-- // Set reference to top level help frame // var WWHFrame = WWHGetWWHFrame("", true); // --> </script> <script type="text/javascript" language="JavaScript1.2" src="scripts/expand.js"></script> </head> <body onload="WWHUpdate();" onunload="WWHUnload();" onkeydown="WWHHandleKeyDown((document.all||document.getElementById||document.layers)?event:null);" onkeypress="WWHHandleKeyPress((document.all||document.getElementById||document.layers)?event:null);" onkeyup="WWHHandleKeyUp((document.all||document.getElementById||document.layers)?event:null);"> <br /> <div class="WebWorks_Breadcrumbs" style="text-align: left;"> <a class="WebWorks_Breadcrumb_Link" href="Nytro_topic_3.html#3_8_8_6_1">Nytro Flash Module Configuration</a> : <a class="WebWorks_Breadcrumb_Link" href="Nytro_topic_3_2.html#3_8_8_6_1">Configuring the Nytro Flash Module</a> : Controller Settings for Nytro Cache Drive</div> <hr align="left" /> <blockquote> <p class="Heading_2"><a name="3_8_8_6_1">Controller Settings for Nytro Cache Drive</a></p> <p class="Body"><span class="Bold"><a name="3_8_8_6_3_1">Current Write Policy</a></span></p> <p class="Body"><a name="3_8_8_6_3_2">Write Policy: Write Back, RAID 1 (optimum controller settings (default))/Write Through, RAID 0.</a></p> <p class="Body"><a name="3_8_8_6_3_3">A virtual drive property that indicates whether the virtual drive currently supports Write Back mode or Write Through mode.</a></p> <div class="List_1_outer" style="margin-left: 1px"> <table border="0" cellspacing="0" cellpadding="0" summary="" role="presentation"> <tr style="vertical-align: baseline"> <td> <p class="List_1_inner" style="width: 18pt; white-space: nowrap"> <img src="square.png" alt="*" border="0" width="5" height="5" /> </p> </td> <td width="100%"> <p class="List_1_inner"><a name="3_8_8_6_3_3_3_1">In Write Back mode, the controller sends a data transfer completion signal to the host when the controller cache has received all of the data in a transaction.</a></p> </td> </tr> </table> </div> <div class="List_1_outer" style="margin-left: 1px"> <table border="0" cellspacing="0" cellpadding="0" summary="" role="presentation"> <tr style="vertical-align: baseline"> <td> <p class="List_1_inner" style="width: 18pt; white-space: nowrap"> <img src="square.png" alt="*" border="0" width="5" height="5" /> </p> </td> <td width="100%"> <p class="List_1_inner"><a name="3_8_8_6_3_3_3_2">In Write Through mode, the controller sends a data transfer completion signal to the host when the drive subsystem has received all of the data in a transaction.</a></p> </td> </tr> </table> </div> <div class="List_1_outer" style="margin-left: 1px"> <table border="0" cellspacing="0" cellpadding="0" summary="" role="presentation"> <tr style="vertical-align: baseline"> <td> <p class="List_1_inner" style="width: 18pt; white-space: nowrap"> <img src="square.png" alt="*" border="0" width="5" height="5" /> </p> </td> <td width="100%"> <p class="List_1_inner"><span class="Bold"><a name="3_8_8_6_3_4_1">Nytro Write Back Caching</a></span></p> </td> </tr> </table> </div> <p class="List_1_Continued"><a name="3_8_8_6_3_4_1_4">RAID 1 Write Back caching: Delivers high application performance acceleration for write-intensive random I/O workloads (mirroring of Flash and losing half the total Flash capacity).</a></p> <div class="List_1_outer" style="margin-left: 1px"> <table border="0" cellspacing="0" cellpadding="0" summary="" role="presentation"> <tr style="vertical-align: baseline"> <td> <p class="List_1_inner" style="width: 18pt; white-space: nowrap"> <img src="square.png" alt="*" border="0" width="5" height="5" /> </p> </td> <td width="100%"> <p class="List_1_inner"><span class="Bold"><a name="3_8_8_6_3_4_2">Nytro Write Through Caching</a></span></p> </td> </tr> </table> </div> <p class="List_1_Continued"><a name="3_8_8_6_3_4_2_4">RAID 0 and RAID 1 Write Through caching: Delivers high application performance acceleration for read-intensive random I/O workloads. In RAID 1 Write Through caching, the application does not receive confirmation of the write completing until the HDD is written.</a></p> <div class="List_1_outer" style="margin-left: 1px"> <table border="0" cellspacing="0" cellpadding="0" summary="" role="presentation"> <tr style="vertical-align: baseline"> <td> <p class="List_1_inner" style="width: 18pt; white-space: nowrap"> <img src="square.png" alt="*" border="0" width="5" height="5" /> </p> </td> <td width="100%"> <p class="List_1_inner"><a name="3_8_8_6_3_5_1">Supported RAID levels for external volume support</a></p> </td> </tr> </table> </div> <p class="List_1_Continued"><a name="3_8_8_6_3_5_1_4">RAID 0, RAID 1, RAID 5, RAID 6, and RAID 00</a></p> <div class="List_1_outer" style="margin-left: 1px"> <table border="0" cellspacing="0" cellpadding="0" summary="" role="presentation"> <tr style="vertical-align: baseline"> <td> <p class="List_1_inner" style="width: 18pt; white-space: nowrap"> <img src="square.png" alt="*" border="0" width="5" height="5" /> </p> </td> <td width="100%"> <p class="List_1_inner"><a name="3_8_8_6_3_5_2">Supported RAID levels for Nytro Cache drive</a></p> </td> </tr> </table> </div> <p class="List_1_Continued"><a name="3_8_8_6_3_5_2_4">RAID 0 and RAID 1</a></p> <p class="List_1_Continued"><a name="3_8_8_6_3_5_2_5">R1-EC (only for full capacity)</a></p> <p class="note_1"> <span style="font-family: Sans-Serif; font-weight: bold">NOTE </span><a name="3_8_8_6_3_5_2_5_3">Nytro MegaRAID controller 1.5 </a><span class="Italic">Autoconfig</span> is R1-EC, which is changed to RAID 1 Write Back in Nytro MegaRAID controller 1.6.</p> <script type="text/javascript" language="JavaScript1.2"> <!-- // Clear related topics // WWHClearRelatedTopics(); document.writeln(WWHRelatedTopicsInlineHTML()); // --> </script> </blockquote> <hr align="left" /> <!-- LSI changed location of company info to align left --> <!-- Added rol from 2011.3 pages.asp file --> <!-- LSI added copyright style --> <!-- --> <table align="left" role="presentation"> <!-- LSI added support for booknum and reldate --> <!-- --> <tr> <td class="copyright">DB15-000988-08-December 2013</td> </tr> <tr> <td class="copyright"> <a href="http://www.lsi.com/Pages/trademark.aspx?" target="external_window">Copyright© 2013 by LSI Corporation. All rights reserved.</a> </td> </tr> </table> <script type="text/javascript" language="JavaScript1.2"> <!-- document.write(WWHRelatedTopicsDivTag() + WWHPopupDivTag() + WWHALinksDivTag()); // --> </script> </body> </html>
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