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RS_ONE_COMMAND_PARAMETER_DATA structure (scsi.h)

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The RS_ONE_COMMAND_PARAMETER_DATA structure contains information about the command data block (CDB) and a usage map for bits in the CDB.

Syntax

typedef struct {
  UCHAR ReadWriteCommandDurationLimitsPage : 1;
  UCHAR Reserved : 7;
  UCHAR Support : 3;
  UCHAR CommandDurationLimitPage : 2;
  UCHAR MultipleLogicalUnits : 2;
  UCHAR CommandTimeoutsDescriptorPresent : 1;
  UCHAR CdbSize[2];
  UCHAR CdbUsageData[ANYSIZE_ARRAY];
} RS_ONE_COMMAND_PARAMETER_DATA, *PRS_ONE_COMMAND_PARAMETER_DATA;

Members

ReadWriteCommandDurationLimitsPage

Indicates the mode page, if any, that specifies the duration limit for the command.

Reserved

Reserved for internal use.

Support

The Support field values are described in the following table:

Value Description
0 Data about the requested SCSI command is not currently available. No data after byte one is valid. A subsequent request for command support data may be successful.
1 The device server does not support the requested command. Data after byte one is undefined.
2 Reserved
3 The device server supports the requested command in conformance with a SCSI standard.
4 Reserved
5 The device server supports the requested command in a vendor specific manner.
6-7 Reserved

CommandDurationLimitPage

Specified the command duration limit page mode. For more information see RS_COMMAND_DESCRIPTOR.

MultipleLogicalUnits

The MultipleLogicalUnits field values are described in the following table:

Value Description
0 The effect of this command on other logical units is not reported.
1 This command affects only this logical unit.
2 This command affects more than one, but not all, logical units contained in this SCSI target device.
3 This command affects all of the logical units contained in this SCSI target device.

CommandTimeoutsDescriptorPresent

Indicates that the command timeouts descriptor is included in the command descriptor.

CdbSize[2]

The size of the command data block (CDB).

CdbUsageData[ANYSIZE_ARRAY]

A bit field containing information about the command data block (CDB). The first byte contains the operation code. If the command contains a service action, that code is in the CdbUsageData field in the same location as the ServiceAction field of the command CDB. All other bytes of the CdbUsageData field contain a usage map for bits in the command data block.

Requirements

Requirement Value
Header scsi.h

See also