get_root_block
if (get_root_block(fDevice, buffer, blockSize, partition->size) != B_OK) {
if (get_root_block(fDevice, buffer, size, partition->size) == B_OK) {
status_t get_root_block(int fDevice, char *buffer, int32 blockSize, off_t partitionSize);
status_t get_root_block(int fDevice, char *buffer, int32 blockSize, off_t partitionSize);