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The following is a list of terms often encountered in SCSI / ATA source code and low-level system utilities.
Command Descriptor Block - each CDB can be a total of 6, 10, 12, or 16 bytes, but later versions of the SCSI standard also allow for variable-length CDBs. The CDB consists of a one byte operation code followed by command-specific parameters.
SCSI / ATA Translation is a set of standards developed by the T10 subcommittee, defining how to communicate with ATA devices through a SCSI application layer.
The SCSI sense key appears in the Sense Data available when a command completes with a CHECK CONDITION status. See http://www.t10.org/lists/2sensekey.htm
The SCSI status code appears in the Status byte returned when processing of a command completes. See http://www.t10.org/lists/2status.htm