Vmware datastores on OceanStor 5500 V3 became failed and can‘t be mounted

Alarm Information
No Alarm Information present on storage device during this issue take place.Handling Process
During analysis of issue several log messages helped to make right conclusion.

1. Back bad records presence in storage log

2. Path flapping records in Vmware logs

Root Cause
The problem is in OceanStor 5500 V3 software version compatibility problem with 4K sector disks, which is described in TT DTS2015091001112.
Customer target datastores were located in NL-SAS pool based on large 4K sector disks. Described compatibility problem led to service disruption for some datastore LUNs and impossibility to mount datastores.
Solution
First, check which LUNs are placed on 4K disks and affected by problem:

In Running data log, search Disk Sector，if 4160, it’s 4K-sector disk.

Then apply following plan to resolve the problem:

1. install patch V300R001C20SPH001

2. Recovery fault page:

Force to flash all LUNs. （Developer:/> change lun_fault_page recover lun_id_list=<4K LUNs list>）

Run this command for every 4K disk LUNs.

3. Use Oceanstor toolkit to make inspection.

4. Migrate VM and check if problem is resolved.