92 lines
5.7 KiB
HTML
92 lines
5.7 KiB
HTML
|
<?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 lang="en-us" xml:lang="en-us">
|
|||
|
|
<head>
|
|||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|||
|
|
<meta name="security" content="public" />
|
|||
|
|
<meta name="Robots" content="index,follow" />
|
|||
|
|
<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
|
|||
|
|
<meta name="DC.Type" content="concept" />
|
|||
|
|
<meta name="DC.Title" content="Complete backup range – last changed date and time" />
|
|||
|
|
<meta name="abstract" content="Using the CPYOPT command causes the system to write the last changed date and time of an optical backup volume or directory." />
|
|||
|
|
<meta name="description" content="Using the CPYOPT command causes the system to write the last changed date and time of an optical backup volume or directory." />
|
|||
|
|
<meta name="DC.Relation" scheme="URI" content="rzam4voltypbckup.htm" />
|
|||
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
|
|||
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2004, 2006" />
|
|||
|
|
<meta name="DC.Format" content="XHTML" />
|
|||
|
|
<meta name="DC.Identifier" content="rzam4compbckuplastdt" />
|
|||
|
|
<meta name="DC.Language" content="en-us" />
|
|||
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
|||
|
|
<!-- US Government Users Restricted Rights -->
|
|||
|
|
<!-- Use, duplication or disclosure restricted by -->
|
|||
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
|||
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
|||
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
|||
|
|
<title>Complete backup range – last changed date and time</title>
|
|||
|
|
</head>
|
|||
|
|
<body id="rzam4compbckuplastdt"><a name="rzam4compbckuplastdt"><!-- --></a>
|
|||
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
|||
|
|
<h1 class="topictitle1">Complete backup range – last changed date and time</h1>
|
|||
|
|
<div><p>Using the CPYOPT command causes the system to write the last changed
|
|||
|
|
date and time of an optical backup volume or directory.</p>
|
|||
|
|
<p>This includes any time that the system wrote files or directory attributes
|
|||
|
|
to the directory or volume. </p>
|
|||
|
|
<p>The last changed date and time for that directory and volume will always
|
|||
|
|
reflect the date and time of the request. This remains true even if the system
|
|||
|
|
writes a file to a backup directory. </p>
|
|||
|
|
<p><strong>Scenario — OneLast Changed Date and Time: </strong>On 1 July 1999, the user
|
|||
|
|
issues the CPYOPT command for directory /DIR1 by specifying *BEGIN as the
|
|||
|
|
starting date. If the system successfully copies all the eligible files, then
|
|||
|
|
the dates are as follows:</p>
|
|||
|
|
<ul><li>The system sets the complete starting date for backup directory /DIR1
|
|||
|
|
to *BEGIN.</li>
|
|||
|
|
<li>The system sets the complete ending date to 1 July 1999.</li>
|
|||
|
|
</ul>
|
|||
|
|
<p>If the system copied at least one file to /DIR1 as a result of this request,
|
|||
|
|
the last changed date is also 1 July 1999.</p>
|
|||
|
|
<p>The system does not necessarily update the last changed date and time as
|
|||
|
|
the result of a successful copy. If the system did not write any files to
|
|||
|
|
the backup directory, the system may update the complete range, but not the
|
|||
|
|
last changed date.</p>
|
|||
|
|
<p><strong>Scenario Two — Last Changed Date and Time:</strong> In the first scenario,
|
|||
|
|
the backup directory /DIR1 has the following as dates after the request:</p>
|
|||
|
|
<ul><li>A starting date of *BEGIN.</li>
|
|||
|
|
<li>An ending date of 1 July 1999.</li>
|
|||
|
|
<li>The last changed date of 1 July 1999.</li>
|
|||
|
|
</ul>
|
|||
|
|
<p>On 1 October 1999, the user issues the CPYOPT command again for directory
|
|||
|
|
/DIR1. This time the command specifies SLTFILE(*CHANGED) to copy only the
|
|||
|
|
files that have changed since the last CPYOPT request. Assume that no files
|
|||
|
|
have changed since the last backup on 1 July 1999. Since no files are eligible
|
|||
|
|
to copy, the system writes no files to the backup directory /DIR1. Therefore,
|
|||
|
|
the last changed date remains 1 July 1999. However, since no eligible files
|
|||
|
|
failed, the complete range for /DIR1 expands to have an ending date of 1 October
|
|||
|
|
1999.</p>
|
|||
|
|
<p>The last changed date and time becomes most important when it is set beyond
|
|||
|
|
the complete range. This would happen if some files were actually copied but
|
|||
|
|
other eligible files failed to copy for some reason.</p>
|
|||
|
|
<p><strong>Scenario — Three Last Changed Date and Time:</strong> In Scenario Two, the
|
|||
|
|
backup directory /DIR1 has the following dates after the request:</p>
|
|||
|
|
<ul><li>A starting date of *BEGIN.</li>
|
|||
|
|
<li>An ending date of 1 October 1999.</li>
|
|||
|
|
<li>A last changed date of 1 July 1999.</li>
|
|||
|
|
</ul>
|
|||
|
|
<p>On 1 December 1999, the user issues the CPYOPT command again for directory
|
|||
|
|
/DIR1. Assume that 10 files were changed or added to primary directory /DIR1
|
|||
|
|
since the last CPYOPT request on 1 October 1999. Assume that only eight files
|
|||
|
|
successfully copy to /DIR1 and that two of the eligible files failed. Since
|
|||
|
|
the system did not copy all eligible files, the complete range stays the same
|
|||
|
|
with a starting date of *BEGIN and an ending date of 10/1/99. However, since
|
|||
|
|
/DIR1 changed, the last changed date gets updated to 1 December 1999. Since
|
|||
|
|
the last changed date is outside the complete range, a complete copy of /DIR1
|
|||
|
|
from *BEGIN to 1 October 1999 may not exist. A more recent copy by the change
|
|||
|
|
on 1 December 1999 might have replaced one of those files.</p>
|
|||
|
|
</div>
|
|||
|
|
<div>
|
|||
|
|
<div class="familylinks">
|
|||
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzam4voltypbckup.htm" title="This topic discusses the *BACKUP volume type and the unique backup process that are associated with a *BACKUP volume.">Volume type *BACKUP</a></div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</body>
|
|||
|
|
</html>
|