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	<title>SHADOW SYS UNIT - Revision history</title>
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	<updated>2026-04-22T18:46:49Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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		<id>https://wiki.vmssoftware.com/index.php?title=SHADOW_SYS_UNIT&amp;diff=1038&amp;oldid=prev</id>
		<title>Darya.zelenina: Created page with &quot;&#039;&#039;&#039;SHADOW_SYS_UNIT&#039;&#039;&#039; is a system parameter that defines an integer value that contains the virtual unit number of the system disk. The default value is...&quot;</title>
		<link rel="alternate" type="text/html" href="https://wiki.vmssoftware.com/index.php?title=SHADOW_SYS_UNIT&amp;diff=1038&amp;oldid=prev"/>
		<updated>2019-07-02T15:12:29Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;&amp;#039;&amp;#039;&amp;#039;SHADOW_SYS_UNIT&amp;#039;&amp;#039;&amp;#039; is a &lt;a href=&quot;/System_Parameters&quot; title=&quot;System Parameters&quot;&gt;system parameter&lt;/a&gt; that defines an integer value that contains the virtual unit number of the system disk. The default value is...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;SHADOW_SYS_UNIT&amp;#039;&amp;#039;&amp;#039; is a [[System Parameters|system parameter]] that defines an integer value that contains the virtual unit number of the system disk. The default value is 0. The maximum value allowed is 9999. This parameter is effective only when the [[SHADOW_SYS_DISK]] parameter has a value of 1. This parameter should be set to the same value on all nodes booting off a particular system disk shadow set. See VSI Volume Shadowing for OpenVMS for more information about setting system parameters for volume shadowing. This parameter is available for Phase II Shadowing only.&lt;br /&gt;
&lt;br /&gt;
[[Category:System Parameters]]&lt;/div&gt;</summary>
		<author><name>Darya.zelenina</name></author>
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