Attribute ID: 183 (0xB7)
Hard drives, supporting this attribute
Samsung, Western Digital
SATA Downshift Error Count S.M.A.R.T. parameter is a Western Digital and Samsung attribute.
This parameter is considered informational by the most hardware vendors. Although degradation of this parameter can be an indicator of drive aging and/or potential electromechanical problems, it does not directly indicate imminent drive failure. Regular backup is recommended. Pay closer attention to other parameters and overall drive health.
See also: S.M.A.R.T. Monitoring.