cpqDaPhyDrvScsiOp reports the SCSI Command Operation Code byte associated with a physical drive error log entry, as defined by the SCSI-2 specification. This lets an admin or support technician see exactly which SCSI command, such as a read or write operation, was in flight when the logged error occurred. For example, a support engineer diagnosing a drive failure would look up this operation code against the SCSI-2 reference to confirm whether the error happened during a read, write, or another command type.