3.2.4.21 CprepDiskGetArbSectors (Opnum 30)

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The CprepDiskGetArbSectors method returns two sectors on the disk that can be used as a "scratch pad" for raw reads/writes.

 HRESULT CprepDiskGetArbSectors(
   [in] CPREP_DISKID DiskId,
   [out] unsigned long* SectorX,
   [out] unsigned long* SectorY
 );

DiskId: The identifier of the ClusPrepDisk representing the disk.

SectorX: The first sector number that is available.

SectorY: The second sector number that is available.

Return Values: A signed 32-bit value that indicates return status. If the method returns a negative value, it has failed. Zero or positive values indicate success, with the lower 16 bits in positive nonzero values containing warnings or flags defined in the method implementation. For more information about Win32 error codes and HRESULT values, see [MS-ERREF] sections 2.2 and 2.1.

Return value/code

Description

0x00000000

S_OK

The call was successful.

0x80070002

ERROR_FILE_NOT_FOUND

The disk was not found.

0x80070548

ERROR_INVALID_SERVER_STATE

The server's Prepare State is not Online.

For any other condition, this method MUST return a value that is not one of the values listed in the preceding table. The client MUST behave in one consistent, identical manner for all values that are not listed in the preceding table.

Exceptions Thrown: No exceptions are thrown beyond those thrown by the underlying RPC protocol [MS-RPCE].

The opnum field value for this method is 30.

When processing this call, the server MUST do the following:

  • Obtain the ClusPrepDisk identified by the DiskId parameter as specified in section 3.2.4.

  • In an implementation-specific way, identify the two sectors on the disk, which are pre-allocated for raw read/write, without disturbing any data that resides on the disk.

The server returns the following information to the client:

  • The numbers of the two available sectors