SVC shows ManagedDiskGroup/mdisk as “Degraded”

September 23, 2015 | In: Storage SAN/NAS, Storage SAN/NAS/DAS/NFS

This usually happens when the LUN provided by the Storage array is not visible in SVC cluster(Zoning issue or Lun masking issue at the back-end Storage).

Check for zoning in your switches. The storage physical host port should be zoned with the SVC physical ports. Check and make sure that each SVC backend ports are zoned with the storage host port.

Also make sure that each ports are accessible from the switches using fc-ping command. Check for any faulty cables and replace. If the zones are present and the hosts are reachable, you may proceed with the SVC cluster manager and perform the following.

SVC Cluster Manager > Work With Managed Disk > Managed Disk > Select the disk which is showing as degraded state > Include an mdisk and hit Go

mdisk

Now move to “Work with Managed Disks > Managed Disk Groups > Click refresh.

The Degraded state should not show as “Online”.

The above can also be done from CLI run “svctask includemdisk ”

mm
Hi All… I have been working the IT Industry since last ten years… Specialized in Linux, Cloud Infrastructure and Solution Design.
On the hobby friend, I do research on IOT, Micro-controllers, Electronics etc.
Music is my passion..Connect me on..

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mm
Presoon John

Hi All... I have been working the IT Industry since last ten years... Specialized in Linux, Cloud Infrastructure and Solution Design.
On the hobby friend, I do research on IOT, Micro-controllers, Electronics etc.
Music is my passion..Connect me on..

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