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Method to improve data reliability on optical disks

IP.com Disclosure Number: IPCOM000198185D
Publication Date: 2010-Jul-29
Document File: 3 page(s) / 79K

Publishing Venue

The IP.com Prior Art Database

Abstract

This disclosure presents a way to enhance the data reliability stored on CD/DVD and other optical disks. When storing the data on an optical disk, we re-organize them into strips and write them with parity check technology.

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Method to improve data reliability on optical disks

When storing the data on an optical disk , we re-organize them into strips and write them with paritycheck technology . The whole disk can be divided into 3~5 concentric circle partitions . The data is written into these partitions separately . When one party of data is damaged , system can calculate the lost data by other parts and the parity . Because the data and parity are not written to physically conjoint areas, the possibility of damaging all the data and parity by a stain is very low .

The cost for 3 partitions is 33% data redundant, for 4 partitions is 25% and for 5 partitions is 20%. (The more partitions the less data redundant? Also, can we present how much data reliability can be enhanced ? ) The Method present in this disclosure gets much better (how much) reliability at the cost of little lower capability (how low?) compared with "RS-PC".

We all know the theory of RAID 5

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                         the Striping with Parity technology . The difference between RAID 5 and this disclosure is that the former one is constructed by Redundant Disk Array and the later one is Redundant on the SAME optical disk .

This redundancy is optional when user start to record a CD /DVD. User can choose whether or not to enable it . And the redundant level from 3 to 5 is also selectable.

As described in section 2, the cost of redundancy is 1/n (n is the number of partitions ). But the more partitions the disk divided into , the lower reliability we get . So, no more than 5 partitions are suggested .

Let's use 3 partitions as e...