Please find below the root cause for this issue is that: For 6TB disks there is memory allocation in the SDS is too small (the default value for tgt_mem__stmp_size_in_lbs is too small) The solution: tgt_mem__stmp_size_in_lbs=262144  important note: This operation must be done on all the SDSs associated with the 6TB disks and must be performed one-by-one (and not in parallel)
We have Scaleio version 2.0.5014 installed and configured in 3-host mode on CentOS 7. It worked fine for 2 month. Today morning 2 of 3 SDS (#1 and #2) lost connection and stay "Disconnected". Reboot is not helpfull. The network is working without problems, ping passes between all hosts. Test sds gives error: [root[NAME] cfg]# scli --start_sds_network_test --sds_ip 192.168.201.24 Error: MDM failed command.  Status: SDS is being configured. Please retry the command.  But "scli --query_sds --sds_ip 192.168.201.24" working: [root[NAME] cfg]# scli --query_all_sds Query-all-SDS returned 3 SDS nodes.  Protection Domain 4ed2eb6300000000 Name: Applico SDS ID: a5361e3300000002 Name: SDS_192.168.201.24 State: Disconnected, Join-Pending IP: 192.168.201.24 Port: 7072 Version: 2.0.5014 SDS ID: a5361e3200000001 Name: SDS_192.168.201.14 State: Disconnected, Join-Pending IP: 192.168.201.14,192.168.202.12 Port: 7072 Version: 2.0.5014 SDS ID: a5361e3100000000 Name: SDS_192.168.201.34 State: Connected, Joined IP: 192.168.201.34,192.168.202.32 Port: 7072 Version: 2.0.5014  "scli --query_sds_connectivity_status --protection_domain_name Applico" hangs with no response.  What can we do to resolve this issue?
SDS disconnected