234 lines
14 KiB
HTML
234 lines
14 KiB
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<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))' />
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<meta name="DC.Title" content="ISO/ANSI standard data set label 1 (HDR1/EOV1/EOF1)" />
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<meta name="abstract" content="The ISO/ANSI standard data set label 1 (HDR1/EOV1/TRL1) is 80 characters in length and is used to identify each data set. The system records the data set label in ASCII." />
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<meta name="description" content="The ISO/ANSI standard data set label 1 (HDR1/EOV1/TRL1) is 80 characters in length and is used to identify each data set. The system records the data set label in ASCII." />
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<meta name="DC.Relation" scheme="URI" content="volum.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>ISO/ANSI standard data set label 1 (HDR1/EOV1/EOF1)</title>
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</head>
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<body id="ahdr1d"><a name="ahdr1d"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">ISO/ANSI standard data set label 1 (HDR1/EOV1/EOF1)</h1>
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<div><p>The ISO/ANSI standard data set label 1 (HDR1/EOV1/TRL1) is 80 characters
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in length and is used to identify each data set. The system records the data
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set label in ASCII.</p>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" width="100%" frame="hsides" border="0" rules="none"><caption>Table 1. Format of the ISO/ANSI Standard
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Data Set Label 1 (HDR1/EOV1/EOF1)</caption><thead align="left"><tr><th align="left" valign="top" width="9.764918625678119%" id="d0e23">Offset</th>
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<th align="left" valign="top" width="15.18987341772152%" id="d0e25">Data type</th>
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<th align="left" valign="top" width="10.488245931283906%" id="d0e27">Length</th>
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<th align="left" valign="top" width="44.66546112115732%" id="d0e29">Contents</th>
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<th align="left" valign="top" width="19.89150090415913%" id="d0e31">File Type</th>
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</tr>
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</thead>
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<tbody><tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">0</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 "> </td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">3</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">Label identifier</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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<tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">3</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 "> </td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">1</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">Label number</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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<tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">4</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 ">Character</td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">17</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">File Identifier</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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<tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">21</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 ">Character</td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">6</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">File Set Identifier</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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<tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">27</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 ">Character</td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">4</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">File Section Number</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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<tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">31</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 ">Character</td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">4</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">File Sequence Number</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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<tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">35</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 ">Character</td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">4</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">Generation Number (not used)</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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<tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">39</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 ">Character</td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">2</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">Version Number (not used)</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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<tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">41</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 ">Character</td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">6</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">Creation Date</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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<tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">47</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 ">Character</td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">6</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">Expiration Date</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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<tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">53</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 ">Character</td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">1</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">Accessibility</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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<tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">54</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 ">Character</td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">6</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">Block Count, Low Order (Trailer labels only)</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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<tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">60</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 ">Character</td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">13</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">System Code (Trailer labels only)</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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<tr><td align="left" valign="top" width="9.764918625678119%" headers="d0e23 ">73</td>
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<td align="left" valign="top" width="15.18987341772152%" headers="d0e25 ">Character</td>
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<td align="left" valign="top" width="10.488245931283906%" headers="d0e27 ">7</td>
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<td align="left" valign="top" width="44.66546112115732%" headers="d0e29 ">Reserved</td>
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<td valign="top" width="19.89150090415913%" headers="d0e31 "> </td>
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</tr>
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</tbody>
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</table>
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</div>
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<p>The manual describes the contents and function of each of the following
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fields.</p>
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<ul><li>Label identifier <div class="p">The characters identify the type of data set label.
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<dl><dt class="dlterm">HDR</dt>
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<dd>Header Label (the beginning of a data set)</dd>
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<dt class="dlterm">EOF</dt>
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<dd>Trailer Label (the end of a data set)</dd>
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<dt class="dlterm">EOV</dt>
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<dd>Trailer Label (the end of a data set that is continued on another volume)</dd>
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</dl>
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</div>
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</li>
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<li>Label number <p>The relative position of this label within the set of
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labels of the same type; it is always 1 for the data set label 1.</p>
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</li>
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<li>File Identifier <p>A unique identification code to identify the data
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set (file). If the data set ID is less than 17 characters, it is left justified
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and padded with blanks.</p>
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</li>
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<li>File Set Identifier <p>This field contains the volume identifier from
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the volume labels of the first volume in a multivolume data set.</p>
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</li>
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<li>File Section Number <p>This field contains the relative volume number
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of this volume in a multivolume data set. The field is 0001 for a single volume
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data set.</p>
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</li>
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<li>File Sequence Number <p>This field indicates the relative position of
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the data set within a multiple data set group. The value will be in EBCDIC
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displayable characters for 0001–9999. For numbers larger than 9999 that will
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not fit in the 4–character field as an EBCDIC displayable character set, the
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first byte will a '?' ('6F'x for EBCDIC labels. The last three bytes will
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be a binary number from 1 to 64000.</p>
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</li>
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<li>Generation Number (not used) <p>If the data set is a part of a generation
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data group, this field contains a number that indicates an absolute generation
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number. <span class="keyword">i5/OS™</span> does
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not use this field.</p>
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</li>
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<li>Version Number (not used) <p>If the data set is part of a generation
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data group, this field contains a number indicating the version number of
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the generation. <span class="keyword">i5/OS</span> does
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not use this field.</p>
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</li>
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<li>Creation Date <p>The creation date of the data set. the program shows
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the date in the format cyyddd, where:</p>
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<p> c = century (blank=19; 0=20;
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1=21; and so on)</p>
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<p> yy = year (00-99)</p>
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<p>ddd = day of the current
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year (001-366)</p>
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<p>Note that the century code gives the first two digits
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of the year, not the actual century. For example, a blank which translates
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into 19 indicates a year in the 1900s, not in the nineteenth century.</p>
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</li>
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<li>Expiration Date <p>The program considers the date in which the data set
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expires. Expired refers to a data set being allowed to be overwritten. The
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user specifies the date in the open tape file used in writing the tape. The <span class="keyword">i5/OS</span> ignores
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the expiration date on input, and verifies the expiration date on output.
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The date is in the format cyyddd, where:</p>
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<p> c = century (blank=19; 0=20;
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1=21; and so on)</p>
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<p> yy = year (00-99)</p>
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<p>ddd = day of the current
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year (001-366)</p>
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<p>Note that the century code gives the first two digits
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of the year, not the actual century. For example, a blank which translates
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into 19 indicates a year in the 1900s, not in the nineteenth century.</p>
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</li>
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<li>Accessibility <div class="p">A code number indicating the security status of the
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data set. <span class="keyword">i5/OS</span> does
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not use this field. The following values indicate data set security values
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created by other systems: <dl><dt class="dlterm">blank</dt>
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<dd>No data set access protection</dd>
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<dt class="dlterm">1</dt>
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<dd>Password protection (Required for read/write/deletion)</dd>
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<dt class="dlterm">3</dt>
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<dd>Password protection (Required for write/deletion)</dd>
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<dt class="dlterm">other character</dt>
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<dd>Protected volume, no access possible</dd>
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</dl>
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</div>
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</li>
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<li>Block Count (Trailer labels only) <p>The field in the trailer labels
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contains the number of data blocks in the data set on the current volume.
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The field in the header labels contains hex zeros.</p>
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</li>
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<li>System Code (Trailer labels only) <div class="p">A unique code that identifies the
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system that created the data set. <dl><dt class="dlterm">IBMOS400</dt>
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<dd>IBM<sup>®</sup> <span class="keyword">i5/OS</span> (previously OS/400<sup>®</sup>)</dd>
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<dt class="dlterm">IBM OS/VS
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370</dt>
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<dd>IBM MVS™ operating
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system</dd>
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</dl>
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</div>
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</li>
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</ul>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="volum.htm" title="This topic describes the volume labels used in the open feedback area.">Volume label fields</a></div>
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</div>
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</div>
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</body>
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</html>
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