IOCTL_TAPE_LOG_SENSE

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Issue this command to obtain the log data of the requested log page from IBM® Magstar® tape device. The data that is returned is formatted according to the IBM Magstar hardware reference.

This IOCTL is only for the tape path.

The following input/output structure is used by the IOCTL_TAPE_LOG_SENSE command.

#define MAX_LOG_SENSE 1024   // Maximum number of bytes the command will return
typedef struct _TAPE_LOG_SENSE_PARAMETERS{
  UCHAR PageCode; // The requested log page code
  UCHAR PC; // PC = 0 for maximum values, 1 for current value, 3 for power-on values
  UCHAR PageLength[2]; /* Length of returned data, filled in by the command */
  UCHAR LogData[MAX_LOG_SENSE]; /* Log data, filled in by the command */
} TAPE_LOG_SENSE_PARAMETERS, *PTAPE_LOG_SENSE_PARAMETERS;

An example of the IOCTL_TAPE_LOG_SENSE command is

 DWORD cb;
 TAPE_LOG_SENSE_PARAMETERS logsense;
 logsense.PageCode=0;
 logsense.PC = 1;

 DeviceIoControl(hDevice,
                 IOCTL_TAPE_LOG_SENSE,
                 &logsense,
                 (long)sizeof(TAPE_LOG_SENSE_PARAMETERS,
                 &logsense,
                 (long)sizeof(TAPE_LOG_SENSE_PARAMETERS,
                 &cb,
                 (LPOVERLAPPED) NULL);