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<h1 class="topictitle1">Attaching a Non-Shared Disk</h1>
<div id="body1512475800862"><div class="section" id="evs_01_0036__section31341812202528"><h4 class="sectiontitle">Scenarios</h4><p id="evs_01_0036__p1077214171240">Separately created EVS disks are data disks. In the disk list, the function of such disks is displayed as <strong id="evs_01_0036__b842352706172629">Data disk</strong>, and the status is displayed as <strong id="evs_01_0036__b842352706172713">Available</strong>. In this case, you need to attach the data disks to <span id="evs_01_0036__text1952351350154544">servers</span> for use.</p>
<div class="p" id="evs_01_0036__p6230616162513">A system disk must be created together with an <span id="evs_01_0036__text564220531903">ECS</span> and is automatically attached. In the disk list, the function of such disks is displayed as <strong id="evs_01_0036__b842352706155347">System disk</strong>, and the status is displayed as <strong id="evs_01_0036__b84235270615548">In-use</strong>. After a system disk is detached from an <span id="evs_01_0036__text14593101613116">ECS</span>, the disk function changes to <strong id="evs_01_0036__b868150400173329">Bootable disk</strong>, and the status changes to <strong id="evs_01_0036__b806098383173329">Available</strong>.<div class="note" id="evs_01_0036__note36300011364"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="evs_01_0036__p56335010364">Bootable disks are the system disks detached from servers. A bootable disk can be re-attached to <span id="evs_01_0036__text132811158203718">a server</span> and be used as a system disk or data disk depending on the disk function selected. For details, see <a href="evs_01_0074.html">Attaching an Existing System Disk</a>.</p>
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<p id="evs_01_0036__p26873194402">This section describes how to attach a non-shared disk.</p>
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<div class="section" id="evs_01_0036__section89541639172311"><h4 class="sectiontitle">Prerequisites</h4><ul id="evs_01_0036__ul6139115112234"><li id="evs_01_0036__li1413925122314">The non-shared disk status is <strong id="evs_01_0036__b8765481775">Available</strong>.</li></ul>
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<div class="section" id="evs_01_0036__section1129213187212"><h4 class="sectiontitle">Constraints</h4><ul id="evs_01_0036__ul846283211181"><li id="evs_01_0036__li1946323210182"><span id="evs_01_0036__ph18448326436">Cloud servers created from ISO images are only used for OS installation. They have limited functions and cannot have EVS disks attached.</span></li><li id="evs_01_0036__li3890336121817">A non-shared disk can be attached to one <span id="evs_01_0036__text36172561712">server</span> only.</li><li id="evs_01_0036__li20973133112191">The disk and the <span id="evs_01_0036__text164143715202">server</span> must be in the same region and AZ.</li><li id="evs_01_0036__li3728536633">A shared disk can be attached only when the <span id="evs_01_0036__evs_01_0037_ph1228512571014"><span id="evs_01_0036__evs_01_0037_text182859519103">servers</span></span>' statuses are <strong id="evs_01_0036__evs_01_0037_b16419102751420">Running</strong> or <strong id="evs_01_0036__evs_01_0037_b105951630121412">Stopped</strong>.</li><li id="evs_01_0036__li5517314441">A frozen disk cannot be attached.</li></ul>
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<div class="section" id="evs_01_0036__section47232828202528"><h4 class="sectiontitle">Attaching the Disk on the EVS Console</h4><ol id="evs_01_0036__ol653842202528"><li id="evs_01_0036__li5884586202528"><span>Log in to the management console.</span></li><li id="evs_01_0036__li52961278202528"><span>Click <span><img id="evs_01_0036__en-us_topic_0021738346_image052111582392" src="en-us_image_0237893718.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="evs_01_0036__li62005093202528"><span>Under <strong id="evs_01_0036__b795918113316">Storage</strong>, click <strong id="evs_01_0036__b109591886338">Elastic Volume Service</strong>.</span><p><p id="evs_01_0036__p21174931202528">The disk list page is displayed.</p>
</p></li><li id="evs_01_0036__li64980985202528"><span>Locate the target disk in the list and click <strong id="evs_01_0036__b460758591">Attach</strong>.</span><p><div class="p" id="evs_01_0036__p9845184614427">The <strong id="evs_01_0036__b925901010">Attach Disk</strong> dialog box is displayed.<div class="fignone" id="evs_01_0036__fig15846164615421"><span class="figcap"><b>Figure 1 </b>Attach Disk dialog box</span><br><span><img id="evs_01_0036__image153341344165519" src="en-us_image_0133519241.png"></span></div>
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</p></li><li id="evs_01_0036__li18457248202528"><span>Select <span id="evs_01_0036__text578532842144143">the server</span> and then select the disk function from the drop-down list. Ensure that the disk and server are in the same AZ.</span><p><p id="evs_01_0036__p259691217216">One device name can be used for one disk only. For how to obtain the disk name in the OS, see section "How Do I Obtain My Disk Name in the ECS OS Using the Device Identifier Provided on the Console?" in the <em id="evs_01_0036__i1427093657">Elastic Cloud Server User Guide</em>.</p>
</p></li><li id="evs_01_0036__li182283315516"><span id="evs_01_0036__p156044019714">Click <span class="uicontrol" id="evs_01_0036__uicontrol1356084012720"><b>OK</b></span> to return to the disk list page.</span><p><p id="evs_01_0036__li182283315516p0">The status of the disk is <strong id="evs_01_0036__b62656710299">Attaching</strong>, indicating that the disk is being attached to the server. When the disk status changes to <strong id="evs_01_0036__b842352706133817">In-use</strong>, the disk is successfully attached.</p>
</p></li><li id="evs_01_0036__li24651320202528"><span>Initialize the disk.</span><p><p id="evs_01_0036__p29475574202528">After the disk has been attached to a <span id="evs_01_0036__text153212549117128">server</span>, the disk can be used only after you have initialized it. For details, see <a href="evs_01_0038.html">Introduction to Data Disk Initialization Scenarios and Partition Styles</a>.</p>
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<div class="section" id="evs_01_0036__section4684104813318"><h4 class="sectiontitle">Attaching the Disk on the ECS Console</h4><ol id="evs_01_0036__ol1995411115341"><li id="evs_01_0036__en-us_topic_0096293655_li3490190117228">Log in to the management console.</li><li id="evs_01_0036__en-us_topic_0096293655_li464234814566">Click <span><img id="evs_01_0036__en-us_topic_0096293655_en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="evs_01_0036__en-us_topic_0096293655_li1514345963117">Under <strong id="evs_01_0036__en-us_topic_0096293655_b124911335201914"><span id="evs_01_0036__en-us_topic_0096293655_text134913358196">Computing</span></strong>, choose <strong id="evs_01_0036__en-us_topic_0096293655_b64921735111910">Elastic Cloud Server</strong>.</li><li id="evs_01_0036__en-us_topic_0096293655_li17143459143113">In the search box above the upper right corner of the <span id="evs_01_0036__en-us_topic_0096293655_text570533014396">ECS</span> list, enter the <span id="evs_01_0036__en-us_topic_0096293655_text15990111018551">ECS</span> name, IP address, or ID for search.</li><li id="evs_01_0036__en-us_topic_0096293655_li4144155920313">Click the name of the target <span id="evs_01_0036__en-us_topic_0096293655_text657784293913">ECS</span>.<p id="evs_01_0036__en-us_topic_0096293655_p18144205916319">The page providing details about the <span id="evs_01_0036__en-us_topic_0096293655_text2293724185518">ECS</span> is displayed.</p>
</li><li id="evs_01_0036__en-us_topic_0096293655_li1114425923112">Click the <strong id="evs_01_0036__en-us_topic_0096293655_b3166031238574">Disks</strong> tab. Then, click <strong id="evs_01_0036__en-us_topic_0096293655_b62538178185745">Attach Disk</strong>.<p id="evs_01_0036__en-us_topic_0096293655_p3144159153115">The <strong id="evs_01_0036__en-us_topic_0096293655_b84235270622427">Attach Disk</strong> dialog box is displayed.</p>
<div class="fignone" id="evs_01_0036__en-us_topic_0096293655_fig1332144315348"><span class="figcap"><b>Figure 2 </b>Attach Disk</span><br><span><img id="evs_01_0036__en-us_topic_0096293655_image142970111914" src="en-us_image_0218677657.png"></span></div>
</li><li id="evs_01_0036__en-us_topic_0096293655_li19144105919315">Select the target disk and specify it as the system disk or a data disk.<div class="note" id="evs_01_0036__en-us_topic_0096293655_note105791934312"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="evs_01_0036__en-us_topic_0096293655_ul1557913920439"><li id="evs_01_0036__en-us_topic_0096293655_li105793912435">If no disks are available, click <strong id="evs_01_0036__b10685184712394">Create Disk</strong> in the lower part of the list.</li><li id="evs_01_0036__en-us_topic_0096293655_li85798934317">For the restrictions on attaching disks, see FAQ "What Are the Requirements for Attaching an EVS Disk to an ECS?" in the <em id="evs_01_0036__i131961531193113">Elastic Cloud Server User Guide</em>.</li><li id="evs_01_0036__en-us_topic_0096293655_li057959184316">The device names for the local disks and EVS disks attached to a disk-intensive ECS comply with the following rules:<ul id="evs_01_0036__en-us_topic_0096293655_ul357969164315"><li id="evs_01_0036__en-us_topic_0096293655_li1357989174314">System disk: sda or vda</li><li id="evs_01_0036__en-us_topic_0096293655_li155793934315">Local disk: the device name following sda or vda in alphabetical order</li><li id="evs_01_0036__en-us_topic_0096293655_li10579179194315">EVS disk: the device name in alphabetical order following those used by local disks</li></ul>
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</li><li id="evs_01_0036__en-us_topic_0096293655_li378881832719">Click <strong id="evs_01_0036__en-us_topic_0096293655_b84235270611586">OK</strong>.<p id="evs_01_0036__en-us_topic_0096293655_p27881518102716">After the disk is attached, you can view the information about it on the <strong id="evs_01_0036__en-us_topic_0096293655_b84235270694114">Disks</strong> tab.</p>
<div class="fignone" id="evs_01_0036__en-us_topic_0096293655_fig18788918132718"><span class="figcap"><b>Figure 3 </b>Viewing the newly attached disk</span><br><span><img id="evs_01_0036__en-us_topic_0096293655_image1939382416223" src="en-us_image_0162733605.png"></span></div>
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<div class="section" id="evs_01_0036__section12130227144011"><h4 class="sectiontitle">Follow-Up Operations</h4><p id="evs_01_0036__p2977174934812">If you are attaching a new disk, you must then log in to the server and initialize the disk before it can be used. To learn how to initialize disks, see <a href="evs_01_0038.html">Introduction to Data Disk Initialization Scenarios and Partition Styles</a>.</p>
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<div class="section" id="evs_01_0036__section1671742714452"><h4 class="sectiontitle">Related Operations</h4><p id="evs_01_0036__p477716815711">If your disk cannot be attached to a server, see <a href="evs_faq_0025.html">Why Can't I Attach My Disk to a Server?</a>.</p>
<p id="evs_01_0036__p20623193814810">If the disk you are going to attach contains data, see <a href="evs_01_0073.html">Attaching an Existing Disk</a>.</p>
<p id="evs_01_0036__p65359525915">If the attached data disk is not showing up, see <a href="evs_faq_0022.html">Why Can't I View the Attached Data Disk on the Server?</a>.</p>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="evs_01_0107.html">Attach an EVS Disk</a></div>
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