DISK_INFO

  • 项目

This structure contains information about the disk device.

typedef struct _DISK_INFO {
  DWORD di_total_sectors;
  DWORD di_bytes_per_sect;
  DWORD di_cylinders;
  DWORD di_heads;
  DWORD di_sectors;
  DWORD di_flags; 
} DISK_INFO, *PDISK_INFO;

Members

  • di_total_sectors
    Total number of blocks on the device.
  • di_bytes_per_sect
    The size of a block in bytes; you must use a value of 512.
  • di_cylinders
    If the device supports cylinder/head/sector (CHS) addressing, the driver may report the number of cylinders; however, the FAT file system does not depend on this information.
  • di_heads
    If the device supports CHS addressing, the driver may report the number of heads per cylinder; however, the FAT file system does not depend on this information.
  • di_sectors
    If the device supports CHS addressing, the driver may report the number of sectors per track; however, the FAT file system does not depend on this information.
  • di_flags
    The following table shows the available flags; you can use any combination of these optional flags.
    Flag Description
    DISK_INFO_FLAG_MBR The device has or needs an MBR.
    DISK_INFO_FLAG_CHS_UNCERTAIN The device does not support CHS addressing; values for di_cylinders, di_heads, and di_sectors may be simulations, estimations, or not provided.
    DISK_INFO_FLAG_UNFORMATTED The device requires a low-level format with the IOCTL_DISK_FORMAT_MEDIA. The FAT file system currently ignores this flag.
    DISK_INFO_FLAG_PAGEABLE The device supports demand paging. Read and write requests are synchronous and do not involve memory manager calls, loader operations, or thread switches.

Requirements

OS Versions: Windows CE .NET 4.0 and later.
Header: Diskio.h.

See Also

Block Drivers | IOCTL_DISK_FORMAT_MEDIA

 Last updated on Tuesday, May 18, 2004

© 1992-2003 Microsoft Corporation. All rights reserved.