ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
if (ret != sizeof(ciso_hdr)) {
SysPrintf("failed to read ciso header\n");
ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
if (ret != sizeof(ciso_hdr)) {
SysPrintf("failed to read ciso header\n");