131 lines
8.3 KiB
HTML
131 lines
8.3 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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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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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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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.Type" content="concept" />
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<meta name="DC.Title" content="IBM standard volume label (VOL1)" />
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<meta name="abstract" content="The IBM standard volume label (VOL1) is 80 characters in length. The system uses it to identify the tape volume, tape volume owner, and security of the tape volume's contents. It is always the first block of data on the tape volume if the tape is a standard labeled tape." />
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<meta name="description" content="The IBM standard volume label (VOL1) is 80 characters in length. The system uses it to identify the tape volume, tape volume owner, and security of the tape volume's contents. It is always the first block of data on the tape volume if the tape is a standard labeled tape." />
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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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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="vdefn" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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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>IBM standard
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volume label (VOL1)</title>
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</head>
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<body id="vdefn"><a name="vdefn"><!-- --></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">IBM standard
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volume label (VOL1)</h1>
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<div><p>The IBM<sup>®</sup> standard
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volume label (VOL1) is 80 characters in length. The system uses it to identify
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the tape volume, tape volume owner, and security of the tape volume's contents.
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It is always the first block of data on the tape volume if the tape is a standard
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labeled tape.</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 IBM standard volume
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label (VOL1) for tape</caption><thead align="left"><tr><th align="left" valign="top" width="12.18961625282167%" id="d0e30">Offset</th>
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<th align="left" valign="top" width="16.02708803611738%" id="d0e32">Data type</th>
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<th align="left" valign="top" width="14.446952595936793%" id="d0e34">Length</th>
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<th align="left" valign="top" width="57.33634311512416%" id="d0e36">Contents</th>
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</tr>
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</thead>
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<tbody><tr><td align="left" valign="top" width="12.18961625282167%" headers="d0e30 ">0</td>
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<td align="left" valign="top" width="16.02708803611738%" headers="d0e32 ">Character</td>
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<td align="left" valign="top" width="14.446952595936793%" headers="d0e34 ">3</td>
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<td align="left" valign="top" width="57.33634311512416%" headers="d0e36 ">Label identifier</td>
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</tr>
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<tr><td align="left" valign="top" width="12.18961625282167%" headers="d0e30 ">3</td>
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<td align="left" valign="top" width="16.02708803611738%" headers="d0e32 ">Character</td>
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<td align="left" valign="top" width="14.446952595936793%" headers="d0e34 ">1</td>
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<td align="left" valign="top" width="57.33634311512416%" headers="d0e36 ">Label number</td>
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</tr>
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<tr><td align="left" valign="top" width="12.18961625282167%" headers="d0e30 ">4</td>
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<td align="left" valign="top" width="16.02708803611738%" headers="d0e32 ">Character</td>
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<td align="left" valign="top" width="14.446952595936793%" headers="d0e34 ">6</td>
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<td align="left" valign="top" width="57.33634311512416%" headers="d0e36 ">Volume identifier (Volume Serial Number)</td>
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</tr>
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<tr><td align="left" valign="top" width="12.18961625282167%" headers="d0e30 ">10</td>
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<td align="left" valign="top" width="16.02708803611738%" headers="d0e32 ">Character</td>
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<td align="left" valign="top" width="14.446952595936793%" headers="d0e34 ">1</td>
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<td align="left" valign="top" width="57.33634311512416%" headers="d0e36 ">Volume access (security)</td>
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</tr>
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<tr><td align="left" valign="top" width="12.18961625282167%" headers="d0e30 ">11</td>
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<td align="left" valign="top" width="16.02708803611738%" headers="d0e32 ">Character</td>
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<td align="left" valign="top" width="14.446952595936793%" headers="d0e34 ">5</td>
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<td align="left" valign="top" width="57.33634311512416%" headers="d0e36 ">VTOC Pointer (not used)</td>
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</tr>
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<tr><td align="left" valign="top" width="12.18961625282167%" headers="d0e30 ">16</td>
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<td align="left" valign="top" width="16.02708803611738%" headers="d0e32 ">Character</td>
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<td align="left" valign="top" width="14.446952595936793%" headers="d0e34 ">21</td>
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<td align="left" valign="top" width="57.33634311512416%" headers="d0e36 ">Reserved</td>
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</tr>
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<tr><td align="left" valign="top" width="12.18961625282167%" headers="d0e30 ">37</td>
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<td align="left" valign="top" width="16.02708803611738%" headers="d0e32 ">Character</td>
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<td align="left" valign="top" width="14.446952595936793%" headers="d0e34 ">14</td>
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<td align="left" valign="top" width="57.33634311512416%" headers="d0e36 ">Owner Name and Address Code (Owner identifier)</td>
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</tr>
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<tr><td align="left" valign="top" width="12.18961625282167%" headers="d0e30 ">51</td>
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<td align="left" valign="top" width="16.02708803611738%" headers="d0e32 ">Character</td>
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<td align="left" valign="top" width="14.446952595936793%" headers="d0e34 ">29</td>
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<td align="left" valign="top" width="57.33634311512416%" headers="d0e36 ">Reserved</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></p>
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<p>The program records the volume label in EBCDIC.</p>
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<p>The contents and function of each of the fields is described below.</p>
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<ul><li>Label identifier <p>The characters VOL identify this label as a volume
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label. The system reads this field to verify that it mounts a standard labeled
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tape. The system also verifies that this label is a volume label. The system
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writes this field to the tape when you use the Initialize Tape (INZTAP) command
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and specify the new volume (NEWVOL) parameter.</p>
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</li>
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<li>Label number <p>The relative position of the label within a set of labels
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of the same type. The label number is always 1 for the IBM standard volume label.</p>
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</li>
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<li>Volume identifier (Volume Serial Number) <p>A unique identification code
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to identify the logical tape volume. The system writes the value that is specified
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for the new volume (NEWVOL) parameter when you use the Initialize Tape (INZTAP)
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command. For media library devices, the program recommends that you match
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the logical volume identifier with the external bar code identifier on the
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cartridges. The value can range from 1 to 6 alphanumeric characters (left-aligned
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and padded with blanks if less than 6). The alphanumeric character set includes
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A-Z, 0-9, @, $, and #. If a program specifies a value for a command in the
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VOL parameter, the system verifies this field to match the specified value.</p>
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</li>
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<li>Volume access (security) <p>The program considers the volume secure (from
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processing) if the volume security field is a blank, character zero, or hex
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zero. *SECOFR authority can process the secured volumes.</p>
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</li>
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<li>VTOC Pointer (not used) <p>Not used by <span class="keyword">i5/OS™</span>.</p>
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</li>
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<li>Owner Name and Address Code (Owner identifier) <p>The owner identifier
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of the tape volume. The system writes a value to this field when you use the
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OWNER parameter on the Initialize Tape (INZTAP) command. The purpose of the
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field is to write the owner identifier of the volume or to write information
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about the contents of the volume.</p>
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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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