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CHANGER_ELEMENT_STATUS structure (winioctl.h)

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Represents the status of the specified element.

Syntax

typedef struct _CHANGER_ELEMENT_STATUS {
  CHANGER_ELEMENT Element;
  CHANGER_ELEMENT SrcElementAddress;
  DWORD           Flags;
  DWORD           ExceptionCode;
  BYTE            TargetId;
  BYTE            Lun;
  WORD            Reserved;
  BYTE            PrimaryVolumeID[MAX_VOLUME_ID_SIZE];
  BYTE            AlternateVolumeID[MAX_VOLUME_ID_SIZE];
} CHANGER_ELEMENT_STATUS, *PCHANGER_ELEMENT_STATUS;

Members

Element

A CHANGER_ELEMENT structure that represents the element.

SrcElementAddress

A CHANGER_ELEMENT structure that represents the element from which the media currently in this element was most recently moved.

This member is valid only if the Flags member includes ELEMENT_STATUS_SVALID.

Flags

The element status. This member can be one or more of the following values.

Value Meaning
ELEMENT_STATUS_ACCESS
0x00000008
 The changer's transport element can access the piece of media in this element. The media is not accessible in the following circumstances: (1) If the element type is ChangerSlot, the slot is not present in the changer (for example, the magazine containing the slot has been physically removed). (2) If the element type is ChangerDrive, the drive is broken or has been removed. (3) If the element type is ChangerIEPort, the changer's insert/eject port is extended.
ELEMENT_STATUS_AVOLTAG
0x20000000
 Alternate volume information in the AlternateVolumeID member is valid.
ELEMENT_STATUS_EXCEPT
0x00000004
 The element is in an abnormal state. Check the ExceptionCode member for more information.
ELEMENT_STATUS_EXENAB
0x00000010
 The element supports export of media through the changer's insert/eject port.
ELEMENT_STATUS_FULL
0x00000001
 The element contains a piece of media.

Note that this value is valid only if the element type is ChangerDrive, ChangerSlot, or ChangerTransport. If ElementType is ChangerIEPort, this value is valid only if the Features0 member of GET_CHANGER_PARAMETERS includes CHANGER_REPORT_IEPORT_STATE.
ELEMENT_STATUS_ID_VALID
0x00002000
 The SCSI target ID in the TargetID member is valid.

This value is valid only if the element type is ChangerDrive.
ELEMENT_STATUS_IMPEXP
0x00000002
 The media in this element was placed there by an operator.

This value is valid only if the element type is ChangerIEPort.
ELEMENT_STATUS_INENAB
0x00000020
 The element supports import of media through the changer's insert/eject port.
ELEMENT_STATUS_INVERT
0x00400000
 The media in the element was flipped.

This value is valid only if ELEMENT_STATUS_SVALID is also included.
ELEMENT_STATUS_LUN_VALID
0x00001000
 The logical unit number in the Lun member is valid. This value is valid only if the element type is ChangerDrive.
ELEMENT_STATUS_NOT_BUS
0x00008000
 The drive at the address indicated by Lun and TargetID is on a different SCSI bus than the changer itself.
ELEMENT_STATUS_PVOLTAG
0x10000000
 Primary volume information in the PrimaryVolumeID member is valid.
ELEMENT_STATUS_SVALID
0x00800000
 The SourceElement member and ELEMENT_STATUS_INVERT are both valid.

ExceptionCode

An exception code that indicates that the element is in an abnormal state. This member is valid only if the Flags member includes ELEMENT_STATUS_EXCEPT. This member can be one of the following values.

Value Meaning
ERROR_DRIVE_NOT_INSTALLED
0x00000008
 The drive at this element address is absent.
ERROR_LABEL_QUESTIONABLE
0x00000002
 The label might be invalid due to a unit attention condition.
ERROR_LABEL_UNREADABLE
0x00000001
 The changer's barcode reader could not read the bar code label on the piece of media in this element, because the media is missing, damaged, improperly positioned, or upside down.
ERROR_SLOT_NOT_PRESENT
0x00000004
 The slot at this element address is currently not installed in the changer. Each slot in a removable magazine is reported not present to indicate that the magazine has been removed.
ERROR_TRAY_MALFUNCTION
0x00000010
 The drive at this element address has a tray that must be extended to load or remove media, and the tray is not extending as required.
ERROR_UNHANDLED_ERROR
0xFFFFFFFF
 Unknown error condition.

TargetId

For a SCSI changer, specifies the SCSI target ID of the drive at this element address. This member is valid only if the ElementType member of the Element structure is ChangerDrive and the Flags member includes ELEMENT_STATUS_ID_VALID.

Lun

The SCSI logical unit number of the drive at this element address. This member is valid only if the ElementType member of the Element structure is ChangerDrive and the Flags member includes ELEMENT_STATUS_LUN_VALID.

Reserved

Reserved for future use. The value of this member must be zero.

PrimaryVolumeID[MAX_VOLUME_ID_SIZE]

The primary volume identifier for the media. If the changer supports a barcode reader and the reader is installed (as indicated by CHANGER_BAR_CODE_SCANNER_INSTALLED in the Features0 member of GET_CHANGER_PARAMETERS), PrimaryVolumeID is the bar code of the media. If the changer does not support a barcode reader, PrimaryVolumeID is the value previously assigned to the media.

This member is valid only if the Flags member includes ELEMENT_STATUS_PVOLTAG.

If the volume identifier is missing or unreadable, this member is cleared.

AlternateVolumeID[MAX_VOLUME_ID_SIZE]

An alternate volume identification for the media. This member is valid only for two-sided media, and pertains to the ID of the inverted side. It never represents a bar code.

This member is valid only if the Flags member includes ELEMENT_STATUS_AVOLTAG.

Requirements

Requirement Value
Minimum supported client Windows XP
Minimum supported server Windows Server 2003
Header winioctl.h (include Windows.h)

See also

CHANGER_ELEMENT

CHANGER_ELEMENT_STATUS_EX

IOCTL_CHANGER_GET_ELEMENT_STATUS