附件2-6：BM可引导光盘格式 Offset Type Description 0 Byte Boot Record Indicator.must be 0 1-5 Byte ISO-9660 Identifier,must be "CD001" 6 Byte Version of this descriptor,must be 1 7-26 Byte Boot System Identifier,must be"EL TORITO SPECIFICATION"padded with 0's. 27-46 Byte Unused,must be 0. 47-4A Dword Absolute pointer to first sector of Boot Catalog 4A-7FF Byte Unused,must be 0. Figure 7-Boot Record Volume Descriptor Version 1.0 Copyright1994 Phoenix Technologies and IBM All Rights Reserved. Page 10附件2-6：IBM可引导光盘格式 Version 1.0 Copyright  1994 Phoenix Technologies and IBM All Rights Reserved. Page 10 Figure 7 - Boot Record Volume Descriptor Offset Offset Type Type Description Description Description Description 0 Byte Boot Record Indicator, must be 0 1-5 Byte ISO-9660 Identifier, must be “CD001” 6 Byte Version of this descriptor, must be 1 7-26 Byte Boot System Identifier, must be “EL TORITO SPECIFICATION” padded with 0’s. 27-46 Byte Unused, must be 0. 47-4A Dword Absolute pointer to first sector of Boot Catalog. 4A-7FF Byte Unused, must be 0