2024年1月31日 · What is Asymmetric Logical Unit Access? ALUA, also known as Target Port Groups Support (TPGS), is a set of SCSI concepts and commands that define path prioritization for SCSI devices. ALUA is a formalized way to describe …

使用Huawei OceanStor Device Manager管理存储系统，并参照下图步骤开启主机启动器的ALUA功能。

A SAN host uses ALUA (Asymmetric Logical Unit Access) and MPIO (multipath I/O) to reroute traffic to a surviving LIF after a link failure. Predefined paths determine the possible routes to the LUN served by the SVM. In a SAN environment, hosts are regarded as initiators of …

开启ALUA. 当存储系统启用ALUA时，ALUA为NMP默认的使用方式，主机系统上不需要进行额外的配置，主机上可以按照下面的步骤查看NMP的路径策略。 使用命令“scsimgr get_attr -D /dev/rdisk/disk24 -a alua_enabled”来查看LUN当前的策略信息。如下所示：

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2017年10月5日 · In simpler terms, ALUA specifies a type of storage device that is capable of servicing I/O to a given LUN on two different storage processors but in an uneven manner. As I mentioned briefly earlier, using ALUA, I/O to a given LUN can be sent to available ports on any of the SPs in the storage array.

2025年1月9日 · Both NMP and ONTAP support Asymmetric Logical Unit Access (ALUA) to negotiate optimized and nonoptimized paths. In ONTAP, an ALUA-optimized path follows a direct data path, using a target port on the node that hosts the LUN being accessed. ALUA is turned on by default in both vSphere and ONTAP.

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1、存储开启ALUA，Windows Server 2008及Windows Server 2008 SP2操作系统上无法实现路径优选的功能，需要手动设置优选路径。 2、存储关闭ALUA，镜像链路故障场景中会导致业务中断，因此推荐在OceanStor T V1存储上开启ALUA。