ISO/IEC 13346 specifies a format and associated system requirements for volume and boot block recognition, volume structure, file structure and record structure for the interchange of information on media between users of information processing systems. The media shall be recorded as if the recording of sectors may be done in any order. Note 1 - The medium is not restricted to being of only one type; the type of medium may be either write once, or read only, or rewritable, or a combination of these types. ISO/IEC 13346 consists of the following five Parts: Part 1: General Part 2: Volume and Boot Block Recognition Part 3: Volume Structure Part 4: File Structure Part 5: Record Structure Annex A - ICB Strategies, is part of ISO/IEC 13346-4. This part of ISO/IEC 13346 specifies a format and associated system requirements for volume structure by specifying: ¾ the attributes of a volume and the descriptors recorded on it; ¾ the relationship among volumes of a volume set; ¾ the attributes of a partition of a volume; ¾ the attributes of a logical volume and the descriptors recorded on it; ¾ levels of medium interchange; ¾ requirements for the processes which are provided within information processing systems, to enable information to be interchanged between different systems; for this purpose, it specifies the functions to be provided within systems which are intended to originate or receive media which conform to this part of ISO/IEC 13346.