In 2017 I had a customer who uses DataCore as Storage-System (still working great! ;)) and we needed as well to connect not only VMware ESXi Servers to this great Storage-System, no in this Case as well two TSM ISP-Servers with Shared Storage running on SLES 11 SP3/4 (not sure) and with this Post I want to share with you the working multipath.conf for DataCore. Please find here the multipath.conf (in the attachment rename from .txt to .conf)

defaults {
                polling_interval 60
}
blacklist {
        devnode "*"
}
blacklist_exceptions {
        device {
                vendor          "DataCore"
                product         "Virtual Disk"
                }
        device {
                vendor          "DGC"
                product         "VRAID"
                }
        devnode         "^sd[b-z]"
        devnode         "^sd[a-z][a-z]"
}

devices {
        device {
                vendor "DataCore"
                product "Virtual Disk"
                path_checker tur
                prio alua
                failback 10
                no_path_retry fail
                dev_loss_tmo infinity
                fast_io_fail_tmo 5
                rr_min_io_rq 100ac
                # Alternative option – See notes below
                # rr_min_io 100
                path_grouping_policy group_by_prio
                # Alternative policy - See notes below
                # path_grouping_policy failover
                # optional - See notes below
                # user_friendly_names yes
                }
        device {
                vendor "DGC"
                product "VRAID"
                path_checker tur
                prio alua
                failback 10
                no_path_retry fail
                dev_loss_tmo infinity
                fast_io_fail_tmo 5
                rr_min_io 1000
		        path_grouping_policy group_by_prio
		}
}

multipaths {
        multipath {
                wwid                    		XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
                alias                   		XXXX-ISP-ActLog
        }
        multipath {
                wwid                    		XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
                alias                   		XXXX-ISP-ActLog-LibManager
        }
        multipath {
                wwid                    		XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
                alias                   		XXXX-ISP-ArchLog
        }
        multipath {
                wwid                    		XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
                alias                   		XXXX-ISP-ArchLog-LibManager
        }
        multipath {
                wwid                    		XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
                alias                   		XXXX-ISP-ClusterDB
        }
        multipath {
                wwid                    		XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
                alias                   		XXXX-ISP-ClusterQuorum
        }
        multipath {
                wwid                    		XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
                alias                   		XXXX-ISP-DB2
        }
        multipath {
                wwid                    		XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
                alias                   		XXXX-ISP-DB2-LibManager
        }
        multipath {
                wwid                    		XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
                alias                   		XXXX-ISP-InstHome
        }
        multipath {
                wwid                    		XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
                alias                   		XXXX-ISP-InstHome-LibManager
        }
        multipath {
                wwid                    XXXXXXXcXXXXXXX9473de447183e711              
                alias					XXX_L00              
        }				
        multipath {				
                wwid                    XXXXXXXcXXXXXXX9673de447183e711                
                alias					XXX_L01              
        }						
        multipath {				
                wwid                    XXXXXXXcXXXXXXX9873de447183e711                
                alias					XXX_L02              
        }				
        multipath {				
                wwid                    XXXXXXXcXXXXXXX9a73de447183e711                
                alias					XXX_L03               
        }				
        multipath {				
                wwid                    XXXXXXXcXXXXXXX9c73de447183e711                
                alias   				XXX_L04              
        }						
        multipath {				
                wwid    				XXXXXXXcXXXXXXX9e73de447183e711                
                alias   				XXX_L05              
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXXa073de447183e711                
                alias   				XXX_L06              
        }						
        multipath {						
                wwid    				XXXXXXXcXXXXXXXa273de447183e711                
                alias   				XXX_L07              
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXXa473de447183e711                
                alias   				XXX_L08              
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXXa673de447183e711                
                alias   				XXX_L09              
        }						
        multipath {						
                wwid    				XXXXXXXcXXXXXXX5ea6eb5c64a4e711                
                alias   				XXX_L10               
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXX60a6eb5c64a4e711                
                alias   				XXX_L11               
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXX62a6eb5c64a4e711                
                alias   				XXX_L12               
        }						
        multipath {						
                wwid    				XXXXXXXcXXXXXXX64a6eb5c64a4e711                
                alias   				XXX_L13               
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXX66a6eb5c64a4e711                
                alias   				XXX_L14               
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXX68a6eb5c64a4e711                
                alias   				XXX_L15               
        }						
        multipath {						
                wwid    				XXXXXXXcXXXXXXX6aa6eb5c64a4e711                
                alias   				XXX_L16               
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXX6ca6eb5c64a4e711                
                alias   				XXX_L17               
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXX6ea6eb5c64a4e711                
                alias   				XXX_L18               
        }						
        multipath {						
                wwid    				XXXXXXXcXXXXXXX70a6eb5c64a4e711                
                alias   				XXX_L19               
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXXcdc727764a4e711                
                alias   				XXX_L20               
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXXedc727764a4e711                
                alias   				XXX_L21               
        }						
        multipath {						
                wwid    				XXXXXXXcXXXXXXX50dc727764a4e711                
                alias   				XXX_L22               
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXX52dc727764a4e711                
                alias   				XXX_L23               
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXX54dc727764a4e711                
                alias   				XXX_L24                
        }						
        multipath {						
                wwid    				XXXXXXXcXXXXXXX56dc727764a4e711                
                alias   				XXX_L25                
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXX58dc727764a4e711                
                alias   				XXX_L26                
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXX5adc727764a4e711                
                alias   				XXX_L27                
        }						
        multipath {						
                wwid    				XXXXXXXcXXXXXXX5cdc727764a4e711                
                alias   				XXX_L28               
        }								
        multipath {				
                wwid    				XXXXXXXcXXXXXXX5edc727764a4e711                
                alias   				XXX_L29              
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXXe7fc4a9d64a4e711                
                alias   				XXX_L30               
        }						
        multipath {						
                wwid    				XXXXXXXcXXXXXXXe9fc4a9d64a4e711                
                alias   				XXX_L31               
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXXebfc4a9d64a4e711                
                alias   				XXX_L32                
        }								
        multipath {						
                wwid    				XXXXXXXcXXXXXXXedfc4a9d64a4e711                
                alias   				XXX_L33                
        }
}