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随着光驱、光盘价格的迅速下降,越来越多的微机配置了光驱,大量软件采用光盘这一容量很大且价格低廉的介质来存储。其中除去部分“光盘版”软件外(指可直接在光驱运行和直接从光盘安装至硬盘的软件),还有很大一部分光盘上储的是各类应用软件的安装盘压缩、打包后的文件,如.ARJ、.ZIP、.DDI、.IMG等。 该部分文件必须解压安装后方可使用,惯常作法是:逐一将打包软件生成的压缩文件解压至软盘,生成安装盘,然后再将其逐次安装至硬盘。该方法的缺点显而易见:软盘操作速度本来就很慢,何况还要进行解压缩(写)与安装(读)两次操作,所以效率极低,加之软件容量为几兆甚至几十兆,还大大加速了软驱与软盘的磨损。
With the optical drive, the rapid decline in the price of optical discs, more and more computers are equipped with CD-ROM drive, a large number of software using the CD-ROM capacity of this large and inexpensive media to store. One part of the CD-ROM software (except CD-ROM software can be run directly from the CD-ROM drive installed directly to the hard disk software), there is a large part of the CD-ROM is stored in various types of application software installation disk compression, packaged files , Such as .ARJ, .ZIP, .DDI, .IMG and so on. This part of the file must be decompressed and installed before it can be used. Common practice is to decompress the compressed file generated by the packaged software one by one to a floppy disk, generate the installation disk, and then install it one by one onto the hard disk. The shortcomings of the method is obvious: the operating speed of the floppy disk has always been very slow, not to mention uncompressed (write) and installation (read) twice, so inefficient, combined with software capacity of a few trillion or even tens of megabytes, but also greatly Accelerated floppy disk and floppy disk wear.