<p class="shortdesc"></p> <p class="p">Elastic Block Storage (EBS) provides highly available, highly reliable, low-cost, and customizable block storage services for ECS, and can be used as an independent scalable disk of ECS.</p> <p class="p">EBS provides disks of varied specifications. You can select appropriate EBS disk types according to actual scenarios, and create and manage disks through the Ping An Could Console. Two methods of creating EBS disks are supported, that is, creating with ECS and creating separately. Operation types and life cycles of the EBS disks created in different ways are also different. For more information, see the operation restrictions. </p> <p class="p">In terms of stored data reliability, EBS adopts the three-copies of data mechanism. That is, save data copies on different physical disks of different servers. That ensures tight consistency among three copies of data, and effectively reduces the impact on business caused by single storage device failure. Besides, EBS supports disk snapshot and backup functions. That is, EBS can back up and restore key information to further improve the reliability of stored data. </p> <img class="image" id="whatisebs__image_ujn_mqc_rlb" src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20200707171849-10105f7598a7.png"> <p class="p">EBS is commonly applied to the following typical scenarios: </p> <ul class="ul" id="whatisebs__ul_ads_kqc_rlb"> <li class="li">You can mount one or more EBS disks to the ECS as storage devices. When the capacity is insufficient, you can continue to purchase the EBS disk or expand the capacity of the original EBS disk. </li> <li class="li">You can mount EBS disks created separately to other cloud servers after the disks have been unmounted, and apply them to data exchanges among different cloud servers. </li> <li class="li">You can build LVM (Logical Volume Manager) logical volumes through multiple EBS disks. Thus, file systems can be distributed on multiple EBS disks and expanded dynamically, and the file system spaces will no longer be limited by EBS disk capacities.</li> <li class="li">You can build RAID (Redundant Array of Independent Disks) through multiple EBS disks. That is, combine multiple independent EBS disks into a disk unit (logical unit) in different ways to obtain higher storage performance and security capability than a single disk. </li> </ul>