Hello Giuseppe,

Are you still in warranty you can call support directly and an engineer can do a remote session with you?

The forum is not set up for direct engagement remote session.

If not we can try to get a look at the logs.

How to gather Support Information MD3xxx https://dell.to/46st8WD

How to Share Log Files, Screenshots, and Error Messages with Dell

https://dell.to/3RS6AKF

Once you have uploaded the report then Direct Message me the service tag so I can collect the report.

Hello Giuseppe,
Thank you for the update. I will get the report and review and update as soon as I am able.

Hello Giuseppe,

Try rescan storage adapters from all server nodes.

If only one is missing paths then you know to focus on something related to that server, if all of them do not see one of the controllers then you would know to focus on the controller, fabric, etc.

Once you know all the servers have paths to both controllers then redistribute virtual disks.

Hello,

for the command to rescan, it depend, what is the OS installed on the nodes?

Redistribute virtual disks or restore preferred path are the same thing.

Dell PowerVault MD 34XX/38XX Series Storage Arrays CLI Guide | Dell Malaysia

Hello Giuseppe,

Below I have an action plan that should help out.

• Plan of action:

○ All hosts have connections to storage on both controllers

○ One of the volumes is still running on RC0 where the rest are on RC1

○ The volume on RC0 still is owned by host group "S-EXT_HG_GLOBAL"

○ This implies that there is possible misconfiguration on the other hosts

○ The fail overs began with an ALUA failover

§ This is where the OS determines that the alt path to the data is better for some reason

○ The fact that the volume has not failed back over yet generally means that MPIO is not configured correctly on all hosts

○ Due to your comment about "#multipath -ll Is enough?", we will assume below that you have a Linux based OS

§ VMware is not the same steps

○ For some reason all virtual disks are configured to run on RC0

§ This is normally found by Linux users that did not install MPIO so changed it to all run on 1 controller

§ See below steps to make sure MPIO is installed and working so the volumes can be distributed evenly for better controller performance

• Steps to help resolve

a. Update controllers to latest FW

i. https://dell.to/46OGcW8

b. Update HDDs to 2S24

i. https://dell.to/46PrPkh

c. Verify MPIO is configured to best practices (assuming Linux Based)

i. Example multipath.conf is @ https://dell.to/46T1JNg

ii. Correct as needed to match for all hosts

d. Evenly assign the volumes amongst the controllers

i. Open MDSM to Storage & Copy Services

ii. Open the disk group to see the volumes

iii. Right click on first volume

iv. Change -> Ownership/Preferred Path

v. Confirm it is on 0 or 1

vi. Repeat process on next volume, but change it to the alternate controller

vii. Repeat for the other 6 volumes verifying or changing so that each volume is assigned to an alternating controller

1. Should end up with 4 on each controller

e. Redistribute the volumes if needed

i. Right click on a volume

ii. Advanced -> Redistribute Virtual Disks…

f. Monitor for a couple days