標準號：BS 6542-2-1988
中文標準名稱：信息交換用軟盤盒的文件結構和標記.第2部分:可變文件分配結構規范
英文標準名稱：File structure and labelling of flexible disk cartridges for information interchange - Specification for variable file allocation structure
標準類型：L75
發布日期：1988/9/30 12:00:00
實施日期：1988/9/30 12:00:00
中國標準分類號：L75
國際標準分類號：35.220.21
適用范圍：This International Standard specifies the volume and file struc-ture of flexible disk cartridges (FDC) for the interchange of information between users of information processing systems. It also specifies an optional record structure. This international Standard is applicable to various types of flexible disk cartridges including those identified in clause 3, and other types which may be the subject of future Inter-national Standards. This International Standard specifies the location of files of in-formation on a flexible disk cartridge, and also specifies a set of recorded descriptors which identifies: — the files which may be interchanged; — the locations of the files; — the attributes of the files; — the location of unused space for recording on the FDC; — the location of defective recording space on the FDC; — the attributes of the FDC and of the descriptors recorded on it. This International Standard also specifies requirements for the processes which are provided within information processing systems to enable information to be interchanged between dif-ferent systems, utilizing recorded flexible disk cartridges as the medium of interchange. For this purpose it specifies the func-tions within systems which are intended to originate or to receive flexible disk cartridges which conform to this Inter-national Standard. This International Standard provides a method for the alloca-tion of space that is independent of the number of files that are recorded on the volume. It also enables the sizes of the record-ed files to be expanded or contracted during processing, sub-ject only to the availability of unused recording space when needed. The contents and organization of the files are not specified by this International Standard and are subject to agreement be-tween the originator and the recipient of the interchanged FDC.