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kernel: [86079.045389] No dialect specified on mount. Default has changed to a more secure dialect, SMB2.1 or later (e.g. SMB3), from CIFS (SMB1). To use the less secure SMB1 dialect to access old servers which do not support SMB3 (or SMB2.1) specify vers=1.0 on mount. kernel: [86079.045389] No dialect specified on mount. Default has changed to a more secure dialect, SMB2.1 or later (e.g. SMB3), from CIFS (SMB1). To use the less secure SMB1 dialect to access old servers which do not support SMB3 (or SMB2.1) specify vers=1.0 on mount.You can always specify a version of SMB //apollo/video/ /mnt/video cifs defaults,vers=1.0,domain=workgroup,username=nicolep,password=mythtv,iocharset=utf8,sec=ntlm 0 0In this example it is specified that the oldest version, SMB 1.0, is specified because the file server is old and runs 1.0.Most NAS devices as of 2020 support SMB 1 through SMB 3.* SMB 1, SMB 2, SMB 2.1, SMB 3