There is no automatic failback to the original path. Jun 28, Posts: The preferred flag, while sometimes visible, is not applicable to the MRU pathing policy and can be disregarded. Moreover, one the reason we’re using a SAN is that it allows us to easily recover from failed hardware: Tue May 27,
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Fixed-The path used by a LUN is always the one muotipath as preferred, unless that path is unavailable. Otherwise, it uses the first working path discovered at system boot time.
ESX , multipath and Active Passive SAN |VMware Communities
Thanks to everyone who responded. SCSI Target 5 vmhba0: Contact your IBM XIV Support representative to obtain a script that can balance the preferred paths automatically and assist you in this task.
The active path is vmhba2: The command esxcli nmp device list lists of LUN multipathing information: Click Start and select Control Panel. The system reboots twice in succession.
You might just need to refresh it. To manage multipath settings for a storage device, click on Configuration tab, and then click on Storage from the left pane. This article helped but additional information was required to resolve my issue. On active preferred- The Path status contains the status of the path.
If no preferred path is specified by the user, the storage array selects the preferred path based on specific criteria. Type esxcli storage core path list -d naaID to list the detailed information of the corresponding paths for a specific device.
You see output similar to: The second option will probably require that Nultipath create a trunk between the two switches and it will also makes impossible for a Windows server to use the multipathing option I’m not even sure how I can have it connect correctly.
To avoid this issue, either upgrade to ESX 4.
To Configure Multipathing After Installation
Wed May 28, 8: Sorry if I just misunderstood you, but, could you have a go at it again, please? Wed May 28, 35 The Manage Paths dialog appears: A serious performance degradation will result if the load-balance variable is left set to round-robinbecause that would result in IO being attempted on the passive path.
The Fixed multipathing policy is the default policy when connecting ESX 3. Rather than using ESX 3.
Is there any other option that I missed? You might just need to refresh it. Multipathing at the OS Level. OS multipathing, jultipath enabled, hides the second path to dual-pathed disks see Multipathing at the OS Level. Wed May 28, 3: Next, you must make sure that the Load Balancing property for each disk is Failover Only. Click the Configuration tab.