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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) / 78K

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. When storing the data on an optical disk, we re-organize them into strips and write them with parity check 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 RAID5 – the Striping with Parity technology. The difference between RAID5 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.

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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...