Importance

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Abstract

The present invention is a system and method which follows a directory tree of a random access disk 20 to obtain file location information and the contents for multiple files. For each file found an entry is created on a file description ring 90 and the file location information is stored in the entry. An insert pointer indicates the next available entry on the ring 90. The system then stores the different type location information (for example file headers, directories and directory headers are different types) for each of the files in corresponding segmented ring buffers 172, 176 and 192 dedicated to storing information of only a single type. The file content is also stored in a dedicated segmented file content ring buffer 132. Each time a ring is updated with information for a file, a corresponding operation pointer (96, 100 and 102) for the ring 90 is advanced. When a ring segment is full, the system transfers the segment to a corresponding location on a destination disk 24 and updates a file allocation list ring 162. The writing of file contents from ring 132 advances a write operation pointer 98. When all files have been written the file allocation list ring 162 is written out to the disk 24. The buffering of the different types of information until a ring segment is full reduces the number of write operations and, not only enhances source read out speed since the read operation does not have to wait for the write operation to occur before the next read operation can start because the data read is stored in the segmented buffer rings, but also enhances write speed by writing segments and increases drive life expectancy by reducing mechanical motion.

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First Claim