[ceph-users] smartctl UNRECOGNIZED OPTION: json=o

Hi, With Ceph Octopus 15.2.5, here is the output of command "ceph device get-health-metrics SEAGATE_DL2400MM0159_WBM2WP2S". =============================== "20201123-000939": { "dev": "/dev/sde", "error": "smartctl failed", "nvme_smart_health_information_add_log_error": "nvme returned an error: sudo: exit status: 231", "nvme_smart_health_information_add_log_error_code": -22, "nvme_vendor": "seagate", "smartctl_error_code": -22, "smartctl_output": "smartctl returned an error (1): stderr:\nsudo: exit status: 1\nstdout:\nsmartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.18.0-147.el8.x86_64] (local build)\nCopyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org\n\n=======> UNRECOGNIZED OPTION: json=o\n\nUse smartctl -h to get a usage summary\n\n" }, =============================== Is this error expected? The disk is SAS HDD, why those keywords with "nvme_" prefix? Is the same keywords used for all types of disk? Where can I see the command line options for running smartctl? Thanks! Tony