Hi Matas,  In a correctly configured, healthy cluster, I can't recall a situation when a single disconnected SDS would cause a DATA FAILURE state.  Can you please check in the GUI (or CLI - scli --query_sds) if there are any devices in the Error state?  Probably the best way of investigation would be through the Service Request, so we can view all the logs and see what exactly was going on there - please open an SR and we'll take it from there.  Thank you, Pawel
Hello, we have a problem with scaleio cluster. Failed capacity is reported if only one sds is down.   48830707 2017-02-07 17:55:20.649 SDS_DISCONNECTED          ERROR         SDS: devvirtp0024l00 (id: 1ce2de4e00000003) decoupled.  48830716 2017-02-07 17:55:21.650 MDM_DATA_FAILED           CRITICAL      The system is now in DATA FAILURE state. Some data is unavailable.  48830745 2017-02-07 17:55:23.490 SDS_RECONNECTED           INFO          SDS: devvirtp0024l00 (ID 1ce2de4e00000003) reconnected  48830770 2017-02-07 17:55:24.649 MDM_DATA_DEGRADED         ERROR         The system is now in DEGRADED state.   Cluster is running 3 fault-sets. There are enought capacity :  SDS Summary:         Total 15 SDS Nodes         15 SDS nodes have membership state 'Joined'         15 SDS nodes have connection state 'Connected'         51.7 TB (52935 GB) total capacity         28.5 TB (29227 GB) unused capacity         201.9 GB (206752 MB) snapshots capacity         15.3 TB (15682 GB) in-use capacity         15.1 TB (15480 GB) thin capacity         15.3 TB (15682 GB) protected capacity  Any ideas ? Thanks,  Matas
Scaleio failed capacity