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Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
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This article describes a disk or diskette containing both optical and magnetic media, the optical media containing files and the magnetic media being used primarily for maintaining a dynamic directory.
English (United States)
This text was extracted from a PDF file.
This is the abbreviated version, containing approximately
91% of the total text.
Page 1 of 1
This article describes a disk or diskette containing both optical and magnetic
media, the optical media containing files and the magnetic media being used
primarily for maintaining a dynamic directory.
Conventional optical disks are write once read mostly (WORM). These disks
can hold hundreds of megabytes of data. One drawback of these devices is that
since they can only be written once, the disk will retain all downlevel versions of
previously altered files. In other words, everything stays recorded. This puts a
burden on the directory. If the directory is located on the optical disk, it too will
contain every entry made to it, thus becoming very inefficient. A directory in
optical storage would have to be searched for the latest version of a previously
The directory could be maintained on an external source such as a
conventional magnetic diskette or hard drive. However, this solution is not
attractive since the directory is not on the same disk. If a directory is lost, the
data would be meaningless.
The disk or diskette disclosed herein is shown in Fig. 1, where both optical
and magnetic media are merged on the same surface. The optical media
contains files and the magnetic media is used primarily for maintaining a dynamic
directory. The magnetic media can also be used for storing files which are under
development, thus reducing the amount of downlevel files in optical storage.
In another embodiment, as shown in Fig. 2, an o...