IOCTL_EHSTOR_DEVICE_QUERY_PROPERTIES IOCTL

Description

A silo driver sends this IOCTL to the storage device stack to query for storage device properties. The Enhanced Storage Class Driver (EHSTOR) will handle the request and return the available properties.

Parameters

Major code

Input buffer

None.

Input buffer length

None.

Output buffer

The output buffer at Irp->AssociatedIrp.SystemBuffer contains an EHSTOR_DEVICE_PROPERTIES structure. EHSTOR_DEVICE_PROPERTIES is declared in ehstorioctl.h as the following.

typedef struct _EHSTOR_DEVICE_PROPERTIES
{
    ULONG  StructSize;
    ULONG  BytesPerSector;
} EHSTOR_DEVICE_PROPERTIES;

Output buffer length

an EHSTOR_DEVICE_PROPERTIES structure.

Input/output buffer

Input/output buffer length

Status block

STATUS_SUCCESS is returned in the Status field if device properties are returned in the system buffer. Otherwise, another appropriate status code is returned.

-BytesPerSector

The size, in bytes, of a sector on the underlying storage device.

-StructSize

The size of the structure. This is set to sizeof(EHSTOR_DEVICE_PROPERTIES).

Remarks

Currently, bytes per sector is the only property available in EHSTOR_DEVICE_PROPERTIES.

See also

SILO_DRIVER_CAPABILITIES