Intel Extensible Firmware Interface - Manual (Page 408)

Extensible Firmware Interface Specification
11-48 12/01/02 Version 1.10
Status Codes Returned
EFI_SUCCESS The data were written correctly to the device.
EFI_WRITE_PROTECTED The device cannot be written to.
EFI_NO_MEDIA There is no media in the device.
EFI_MEDIA_CHANGED The MediaId is not for the current media.
EFI_DEVICE_ERROR The device reported an error while attempting to perform the write
operation.
EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of the intrinsic
block size of the device.
EFI_INVALID_PARAMETER The write request contains LBAs that are not valid, or the buffer is
not on proper alignment.