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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>11.6. Maintaining Hypervisors on Hosts</title><link rel="stylesheet" type="text/css" href="Common_Content/css/default.css" /><link rel="stylesheet" media="print" href="Common_Content/css/print.css" type="text/css" /><meta name="generator" content="publican 2.8" /><meta name="package" content="Apache_CloudStack-Admin_Guide-4.0.0-incubating-en-US-1-" /><link rel="home" href="index.html" title="CloudStack Administrator's Guide" /><link rel="up" href="working-with-hosts.html" title="Chapter 11. Working With Hosts" /><link rel="prev" href="re-install-hosts.html" title="11.5. Re-Installing Hosts" /><link rel="next" href="change-host-password.html" title="11.7. Changing Host Password" /></head><body><p id="title"><a class="left" href="http://cloudstack.org"><img src="Common_Content/images/image_left.png" alt="Product Site" /></a><a class="right" href="http://docs.cloudstack.org"><img src="Common_Content/images/image_right.png" alt="Documentation Site" /></a></p><ul class="docnav"><li class="previous"><a accesskey="p" href="re-install-hosts.html"><strong>Prev</strong></a></li><li class="next"><a accesskey="n" href="change-host-password.html"><strong>Next</strong></a></li></ul><div xml:lang="en-US" class="section" id="maintain-hypervisors-on-hosts" lang="en-US"><div class="titlepage"><div><div><h2 class="title" id="maintain-hypervisors-on-hosts">11.6. Maintaining Hypervisors on Hosts</h2></div></div></div><div class="para">
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When running hypervisor software on hosts, be sure all the hotfixes provided by the hypervisor vendor are applied. Track the release of hypervisor patches through your hypervisor vendor’s support channel, and apply patches as soon as possible after they are released. CloudStack will not track or notify you of required hypervisor patches. It is essential that your hosts are completely up to date with the provided hypervisor patches. The hypervisor vendor is likely to refuse to support any system that is not up to date with patches.
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</div><div class="note"><div class="admonition_header"><h2>Note</h2></div><div class="admonition"><div class="para">
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The lack of up-do-date hotfixes can lead to data corruption and lost VMs.
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</div></div></div><div class="para">
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(XenServer) For more information, see <a href="http://docs.cloudstack.org/Knowledge_Base/Possible_VM_corruption_if_XenServer_Hotfix_is_not_Applied/Highly_Recommended_Hotfixes_for_XenServer_5.6_SP2">Highly Recommended Hotfixes for XenServer in the CloudStack Knowledge Base</a>
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</div></div><ul class="docnav"><li class="previous"><a accesskey="p" href="re-install-hosts.html"><strong>Prev</strong>11.5. Re-Installing Hosts</a></li><li class="up"><a accesskey="u" href="#"><strong>Up</strong></a></li><li class="home"><a accesskey="h" href="index.html"><strong>Home</strong></a></li><li class="next"><a accesskey="n" href="change-host-password.html"><strong>Next</strong>11.7. Changing Host Password</a></li></ul></body></html>
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