How can these scenario happen?
a LUN presented to a group is presented in the storage as LUN_A but when this is discovered via vSphere client, the name suddenly became snap_LUN_A.
Checked the storage and no such device name appears and no snap is created.
UUID/NAA of LUN_A is the same with snap_LUN_A
This is a DR LUN.
Replication is manually disabled then the storage is added manually to the hosts (but they were already presented before)
Previous activity were fine but last Sunday, that issue comes up.
If you use SRM, this name prefix happend because there is a configuration on advanced setting of SRM need to configure,
The option is not checked by default so I recommend to check it.
To access the advanced settings for Site Recovery Manager (SRM):