IOCTL_EHSTOR_DEVICE_QUERY_PROPERTIES IOCTL (ehstorioctl.h)

Article
05/18/2021

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.

Major code

IRP_MJ_DEVICE_CONTROL

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.

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.

Remarks

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

Requirements

Requirement	Value
Minimum supported client	Available starting with Windows 8
Header	ehstorioctl.h (include EhStorIoctl.h)

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