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53 lines
3.2 KiB
XML
53 lines
3.2 KiB
XML
<?xml version='1.0' encoding='utf-8' ?>
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<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % BOOK_ENTITIES SYSTEM "cloudstack.ent">
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%BOOK_ENTITIES;
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]>
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<!-- Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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-->
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<section id="working-with-volumes">
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<title>Working With Volumes</title>
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<para>A volume provides storage to a guest VM. The volume can provide for a root disk or an
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additional data disk. &PRODUCT; supports additional volumes for guest VMs. </para>
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<para>Volumes are created for a specific hypervisor type. A volume that has been attached to guest
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using one hypervisor type (e.g, XenServer) may not be attached to a guest that is using another
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hypervisor type, for example:vSphere, KVM. This is because the different hypervisors use different
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disk image formats. </para>
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<para>&PRODUCT; defines a volume as a unit of storage available to a guest VM. Volumes are either
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root disks or data disks. The root disk has "/" in the file system and is usually the boot
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device. Data disks provide for additional storage, for example: "/opt" or "D:". Every guest VM
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has a root disk, and VMs can also optionally have a data disk. End users can mount multiple data
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disks to guest VMs. Users choose data disks from the disk offerings created by administrators.
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The user can create a template from a volume as well; this is the standard procedure for private
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template creation. Volumes are hypervisor-specific: a volume from one hypervisor type may not be
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used on a guest of another hypervisor type. </para>
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<note>
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<para>&PRODUCT; supports attaching up to 13 data disks to a VM on XenServer hypervisor versions
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6.0 and above. For the VMs on other hypervisor types, the data disk limit is 6.</para>
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</note>
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<xi:include href="creating-new-volumes.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
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<xi:include href="upload-existing-volume-to-vm.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
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<xi:include href="attaching-volume.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
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<xi:include href="detach-move-volumes.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
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<xi:include href="vm-storage-migration.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
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<xi:include href="resizing-volumes.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
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<xi:include href="volume-deletion-garbage-collection.xml"
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xmlns:xi="http://www.w3.org/2001/XInclude"/>
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</section>
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