// mountdev.h

typedef struct _MOUNTDEV_UNIQUE_ID {
  USHORT UniqueIdLength;
  UCHAR  UniqueId[1];
} MOUNTDEV_UNIQUE_ID, *PMOUNTDEV_UNIQUE_ID;
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Windows Driver Kit DDI reference (ns-mountdev-_mountdev_unique_id)

Description

The MOUNTDEV_UNIQUE_ID structure contains a unique volume ID that a mount manager client provides to the mount manager in response to an IOCTL_MOUNTDEV_QUERY_UNIQUE_ID request.

Members

`UniqueIdLength`

The length of the unique volume ID, in bytes.

`UniqueId`

Array of bytes that specify the unique volume ID.

Remarks

For a discussion of unique volume IDs and how the mount manager uses them, see Supporting Mount Manager Requests in a Storage Class Driver.

As a best practice, the implementer must not thread synchronize and must not make blocking and/or Interprocess Communication (IPC) function calls.

MOUNTDEV_UNIQUE_ID - NtDoc