214 lines
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HTML
214 lines
12 KiB
HTML
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<title>Disk drives for integrated Windows servers</title>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<a name="rzahqstcco"></a>
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<h3 id="rzahqstcco">Disk drives for integrated Windows servers</h3>
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<p>Integrated servers do not have their own disk drives. i5/OS™ creates network
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server storage spaces within its own file system and integrated servers use
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them as if they were normal hard disk drives.</p>
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<p><img src="delta.gif" alt="Start of change" />For an integrated Windows server to recognize an integrated
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server disk drive (network server storage space) as a hard disk drive, you
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must link them together. You must create a disk drive before you can link
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it. See <a href="rzahqcstpi.htm#rzahqcstpi">Create an integrated server disk drive</a> and <a href="rzahqlstpi.htm#rzahqlstpi">Link a disk drive to an integrated server</a>. After you
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create and link a new integrated server disk drive, it appears as a new hard
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disk drive to the integrated server. Then you must format it before you can
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use it. See <a href="rzahqfstpi.htm#rzahqfstpi">Format integrated server disk drives</a>.<img src="deltaend.gif" alt="End of change" /></p>
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<p>Disk drives can be linked to servers in one of the following ways:</p>
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<ol type="1">
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<li>Fixed (static) disk drive links allow disk drives to be linked to the
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server using user specified link sequence positions. The order that the server
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sees the drives is determined by the relative order of the link sequence positions.
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The server must be varied off when adding a fixed (static) disk drive link.
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<a name="wq281"></a>
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<div class="notetitle" id="wq281">Note:</div><img src="delta.gif" alt="Start of change" />
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<div class="notebody">Static drive links are not used for iSCSI attached xSeries® servers.</div><img src="deltaend.gif" alt="End of change" /></li>
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<li>A cluster quorum resource disk drive link is used to link the cluster
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quorum resource disk drive to the servers in the cluster.</li>
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<li>Cluster shared disk drive links allow a disk drive to be shared among
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clustered integrated servers. A shared drive can only be linked to nodes that
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share a common quorum resource drive. Drives of this type are available to
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all nodes that are joined together by the links of the cluster quorum resource.
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Each node has access to the shared drives under the control of Windows Cluster
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services running on each node.
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<p><span class="bold">Note:</span> Drives that
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are linked as shared should be linked to ALL nodes that are clustered together.</p></li>
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<li>Dynamic disk drive links allow additional disk drives to be linked to
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an integrated server using dynamically assigned link sequence positions. The
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disk link sequence position is assigned dynamically at the time that the disk
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drive is linked to an active server. The disk link sequence position can be
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specified, but it is not used until the server is restarted. The integrated
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server can either be shut down or active when adding a dynamic disk drive
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link.</li></ol>
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<p><img src="delta.gif" alt="Start of change" />When a non-iSCSI integrated server is started, it sees the disk
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drives in the following order:<img src="deltaend.gif" alt="End of change" /></p>
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<ol type="1">
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<li>Statically linked disk drives.</li>
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<li>Cluster quorum resource disk drive.</li>
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<li>Cluster shared disk drives.</li>
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<li>Dynamically linked disk drives.</li></ol>
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<p><img src="delta.gif" alt="Start of change" />For iSCSI attached servers, the cluster quorum disk appears
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at the end of the list of disk drives. Dynamically linked disks and cluster
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shared disks can be intermixed.<img src="deltaend.gif" alt="End of change" /></p>
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<p>Within each of these link type categories, the disks appear in the order
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of their user specified link sequence positions. When dynamically linking
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a disk drive to an active server, the new disk drive appears following all
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other linked disk drives.</p>
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<p><img src="delta.gif" alt="Start of change" />The following table shows the iSeries™ virtual disk drive features supported
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for various types of server network server descriptions (NWSDs) with i5/OS V5R4 or later.<img src="deltaend.gif" alt="End of change" /></p>
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<p><img src="delta.gif" alt="Start of change" /><span class="bold">Disk features supported</span><img src="deltaend.gif" alt="End of change" /></p><img src="delta.gif" alt="Start of change" />
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<a name="wq283"></a>
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<table id="wq283" width="100%" summary="" border="1" frame="border" rules="all" class="singleborder">
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<thead valign="bottom">
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<tr class="tablemainheaderbar">
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<th id="wq284" align="left" valign="top">Feature</th>
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<th id="wq285" align="left" valign="top">NWSD type<sup>5</sup> *WINDOWSNT or
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*IXSVR
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<br />with OS type *WIN32</th>
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<th id="wq286" align="left" valign="top">NWSD type<sup>5</sup> *ISCSI
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<br />with
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OS type *WIN32</th>
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</tr>
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</thead>
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<tbody valign="top">
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<tr>
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<td align="left" valign="top" headers="wq284">Number of fixed (static) links</td>
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<td align="left" valign="top" headers="wq285">16</td>
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<td align="left" valign="top" headers="wq286">0</td>
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</tr>
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<tr>
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<td headers="wq284">Number of dynamic links</td>
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<td headers="wq285">16</td>
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<td headers="wq286">63<sup>1</sup></td>
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</tr>
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<tr>
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<td headers="wq284">Number of cluster quorum links</td>
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<td headers="wq285">1</td>
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<td headers="wq286">1</td>
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</tr>
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<tr>
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<td headers="wq284">Number of cluster shared links</td>
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<td headers="wq285">15</td>
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<td headers="wq286">61<sup>1</sup></td>
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</tr>
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<tr>
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<td headers="wq284">Maximum number of virtual disks that can be linked to
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the server</td>
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<td headers="wq285">48 with clustering<sup>2</sup>; 32
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otherwise</td>
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<td headers="wq286">64 with clustering<sup>2</sup>; 63
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otherwise</td>
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</tr>
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<tr>
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<td headers="wq284">Maximum capacity per virtual disk</td>
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<td headers="wq285">1000 GB</td>
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<td headers="wq286">1000 GB</td>
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</tr>
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<tr>
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<td headers="wq284">Maximum total virtual disk capacity, assuming 1000 GB
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per disk</td>
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<td headers="wq285">46.9 TB with clustering<sup>2</sup>;
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31.3 TB otherwise</td>
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<td headers="wq286">62.5 TB with clustering<sup>2</sup>;
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61.5 TB otherwise</td>
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</tr>
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<tr>
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<td headers="wq284">Can link virtual disks while the server is active?</td>
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<td headers="wq285">Yes
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<br />Exceptions: fixed links</td>
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<td headers="wq286">Yes
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<br />Exceptions: dynamic links 1-2</td>
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</tr>
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<tr>
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<td headers="wq284">Can unlink virtual disks while the server is active?</td>
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<td headers="wq285">Yes
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<br /><span><img src="delta.gif" alt="Start of change" />Exceptions: fixed links,
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disk can not be part of a volume set, disk can not be a volume mounted in
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a directory<img src="deltaend.gif" alt="End of change" /></span></td>
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<td headers="wq286">Yes
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<br /><span>Exceptions: dynamic links 1-2, disk
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can not be part of a volume set, disk can not be a volume mounted in a directory </span></td>
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</tr>
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<tr>
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<td headers="wq284">Virtual disk format types allowed when linking<sup>3</sup></td>
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<td headers="wq285">*NTFS, *NTFSQR, *FAT, *FAT32, *OPEN</td>
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<td headers="wq286">*NTFS, *NTFSQR, *FAT, *FAT32, *OPEN</td>
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</tr>
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<tr>
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<td headers="wq284">Virtual disk access types allowed when linking</td>
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<td headers="wq285">Exclusive update, shared update<sup>4</sup></td>
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<td headers="wq286">Exclusive update, shared update<sup>4</sup></td>
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</tr>
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<tr>
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<td headers="wq284">Disk links requiring exclusive update address type</td>
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<td headers="wq285">All fixed disk links and all dynamic links</td>
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<td headers="wq286">All dynamic links</td>
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</tr>
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<tr>
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<td headers="wq284">Disk links requiring shared update address type</td>
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<td headers="wq285">Cluster quorum link and all cluster shared disk links</td>
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<td headers="wq286">Cluster quorum link and all cluster shared disk links</td>
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</tr>
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</tbody>
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</table><img src="deltaend.gif" alt="End of change" />
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<a name="wq287"></a>
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<div class="notelisttitle" id="wq287">Notes:</div>
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<ol type="1"><img src="delta.gif" alt="Start of change" />
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<li>For iSCSI Windows servers, the dynamic and cluster shared disks use the
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same sequence position range and can be intermixed. The combined total number
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of dynamic and cluster shared disk links is 63.</li>
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<li>Windows server clustering requires use of Microsoft® Cluster Service (MSCS) to control
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access to the shared disks in the cluster.</li>
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<li>See the Create NWS Storage Space (CRTNWSSTG) command help text for a description
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of the format types.</li>
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<li>When multiple servers link a disk using shared update, only one server
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can actually have write access to the disk at any point in time. For example,
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on Windows servers, Microsoft Cluster Service (MSCS) is used
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to control which server in the cluster has write access to the disk.</li>
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<li>See the Create Network Server Desc (CRTNWSD) command help text for a description
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of the NWSD types and the associated operating system (OS) types.</li><img src="deltaend.gif" alt="End of change" />
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</ol>
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<p>Network server storage spaces can reside in either the i5/OS system disk
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pool (ASP 1) or a user disk pool. You can copy one disk drive to another to
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move it to a different disk pool.</p>
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<p><img src="delta.gif" alt="Start of change" />After a network server storage space has been created and linked
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to an integrated server, you must format it from the Windows console. You
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can choose from between three types of disk formats. You will probably choose
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NTFS since it is the most efficient and secure format. Partitions formatted
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with NTFS can be up to 1,024,000 MB. Another format type is FAT-32. Partitions
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formatted with FAT-32 can be from 512 – 32,000 MB. The oldest format
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type is FAT. The maximum possible size for a FAT partition is 2,047 MB. The
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predefined installation source drive partition (D), which must be in FAT format,
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is therefore limited to 2,047 MB.<img src="deltaend.gif" alt="End of change" /></p>
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<p>Network server storage spaces are one of the two types of network storage
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that integrated servers use. Integrated servers can also access resources
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on i5/OS that an administrator has shared with the network by using iSeries NetServer™.</p>
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<p>The IBM® iSeries integrated server support installation process creates several
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disk drives that are used to install and run integrated Windows servers. See
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the topic on <a href="rzahqrstrf.htm#rzahqrstrf">Predefined disk drives for integrated Windows servers</a>.</p>
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<p><img src="delta.gif" alt="Start of change" />For information about creating drives, see <a href="rzahqcstpi.htm#rzahqcstpi">Create an integrated server disk drive</a><img src="deltaend.gif" alt="End of change" /></p>
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