13:57:10.426721+0100 0x50b9e Error 0x0 223 0 backupd: (TimeMachine) Failed to attach to '/Volumes/.timemachine/Qnap._smb._tcp.local/573A59DC-E85C-42BD-ADAC-27542E95BF62/TimeMachine/MacBook Pro de Laurent.sparsebundle', error: 112 no mountable file systems I experience the same issue : Backup start well, create some files, then stop.
