| UID | title | description | old-location | tech.root | ms.date | keywords | ms.keywords | req.header | req.include-header | req.target-type | req.target-min-winverclnt | req.target-min-winversvr | req.kmdf-ver | req.umdf-ver | req.ddi-compliance | req.unicode-ansi | req.idl | req.max-support | req.namespace | req.assembly | req.type-library | req.lib | req.dll | req.irql | targetos | req.typenames | f1_keywords | topic_type | api_type | api_location | api_name | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
NS:ntddstor._STORAGE_ADAPTER_DESCRIPTOR |
STORAGE_ADAPTER_DESCRIPTOR (ntddstor.h) |
The STORAGE_ADAPTER_DESCRIPTOR structure is used in conjunction with the IOCTL_STORAGE_QUERY_PROPERTY request to retrieve the storage adapter descriptor data for a device. |
storage\storage_adapter_descriptor.htm |
storage |
04/01/2021 |
|
PSTORAGE_ADAPTER_DESCRIPTOR, PSTORAGE_ADAPTER_DESCRIPTOR structure pointer [Storage Devices], SRB_TYPE_SCSI_REQUEST_BLOCK, SRB_TYPE_STORAGE_REQUEST_BLOCK, STORAGE_ADAPTER_DESCRIPTOR, STORAGE_ADAPTER_DESCRIPTOR structure [Storage Devices], STORAGE_ADDRESS_TYPE_BTL8, _STORAGE_ADAPTER_DESCRIPTOR, ntddstor/PSTORAGE_ADAPTER_DESCRIPTOR, ntddstor/STORAGE_ADAPTER_DESCRIPTOR, storage.storage_adapter_descriptor, structs-general_196c7640-0a2d-4567-8958-1244c46b84a6.xml |
ntddstor.h |
Ntddstor.h |
Windows |
Windows |
STORAGE_ADAPTER_DESCRIPTOR, PSTORAGE_ADAPTER_DESCRIPTOR |
|
|
|
|
|
The STORAGE_ADAPTER_DESCRIPTOR structure is used in conjunction with the IOCTL_STORAGE_QUERY_PROPERTY request to retrieve the storage adapter descriptor data for a device.
Contains the version of the structure STORAGE_ADAPTER_DESCRIPTOR. The value of this member will change as members are added to the structure.
Specifies the total size of the descriptor, in bytes.
Specifies the maximum number of bytes the host bus adapter (HBA) can transfer in a single operation.
Specifies the maximum number of discontinuous physical pages the HBA can manage in a single transfer (in other words, the extent of its scatter/gather support).
Specifies the HBA's alignment requirements for transfers. A storage class driver sets the AlignmentRequirement field in its device objects to this value. The alignment mask indicates alignment restrictions for buffers required by the HBA for transfer operations. The valid mask values are 0 (byte aligned), 1 (word aligned), 3 (DWORD aligned), and 7 (double DWORD aligned).
Indicates when TRUE that the HBA uses Programmed Input/Output (PIO) and requires the use of system-space virtual addresses mapped to physical memory for data buffers. When FALSE, the HBA does not use PIO.
Indicates when TRUE that the HBA scans down for BIOS devices, that is, the HBA begins scanning with the highest device number rather than the lowest. When FALSE, the HBA begins scanning with the lowest device number. This member is reserved for legacy miniport drivers.
Indicates when TRUE that the HBA supports SCSI-tagged queuing and/or per-logical-unit internal queues, or the non-SCSI equivalent. When FALSE, the HBA neither supports SCSI-tagged queuing nor per-logical-unit internal queues.
Indicates when TRUE that the HBA supports synchronous transfers as a way of speeding up I/O. When FALSE, the HBA does not support synchronous transfers as a way of speeding up I/O.
Specifies a value of type STORAGE_BUS_TYPE that indicates the type of bus to which the device is connected.
Specifies the major version number, if any, of the HBA.
Specifies the minor version number, if any, of the HBA.
Specifies the SCSI request block (SRB) type used by the HBA. This member is valid starting with Windows 8.
| Value | Meaning |
|---|---|
| SRB_TYPE_SCSI_REQUEST_BLOCK | The HBA uses SCSI request blocks. |
| SRB_TYPE_STORAGE_REQUEST_BLOCK | The HBA uses extended SCSI request blocks. |
Specifies the address type of the HBA. This member is valid starting with Windows 8.
| Value | Meaning |
|---|---|
| STORAGE_ADDRESS_TYPE_BTL8 | The HBA uses 8-bit bus, target, and LUN addressing. |
Storage class drivers issue a device-control request with the I/O control code IOCTL_STORAGE_QUERY_PROPERTY to retrieve this structure, which contains configuration information from the HBA for data transfer operations. The structure can be retrieved either from the device object for the bus or from a functional device object (FDO), which forwards the request to the underlying bus.
If excessive protocol errors occur on an HBA that supports synchronous transfers (AcceleratedTransfer is TRUE), the storage class driver can disable synchronous transfers by setting SRB_FLAGS_DISABLE_SYNCH_TRANSFER in SRBs.