Plextor

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Plextor

Type
Founded	1985
Headquarters
Industry	Computer hardware
Products	CD and DVD writers
Website	www.plextor.com

The brand Plextor (プレクスター, Purekusutā^?) is best known for its CD and DVD writers. The brand name is used for all products manufactured by the Electronic Equipment Division and Printing Equipment Division of Shinano Kenshi. The brand was formerly known as TEXEL by which name it introduced the first CD-ROM optical disk drive in 1989. The brand is used for CD and DVD burners, CD/DVD media, network hard disks, portable hard disks, digital video recorder, floppy disk drives, and USB flash memory products.

[edit] Products

Plextor is generally regarded as being one of the highest quality producers of optical drives. This quality is reflected in their prices, which are some of the highest in the marketplace. Despite its price, Plextor was late in DVD-RAM support (ironically, in later models such as PX-760, PX-755, PX-716, such support is removed, although the Sanyo chipset supports DVD-RAM). Its product line also included PX-OE100E PlexEraser, a disc erasing drive.

Software products include PlexTools.

In 2007, Plextor was rumored to exit consumer CD and DVD optical disk drives (ODDs) to concentrate on other product lines.[1] As a part of the reorganization, the production of optical disk drives (ODDs) would be reduced to 10% of the peak production levels and the company would concentrate its business on industrial equipment and the Plextalk digital sound recording playback equipment for blind. As a response to the rumors, Plextor issued a press release [2] reaffirming their commitment to stay as a leading manufacturer of optical disc drives for business customers as well as consumers. However, the contents of the press release disappeared from company's site as of 2007-2-12.

[edit] Threats to software volunteers

Plextor has introduced 'protected commands' (often called Q-Check functions) in PX-755 and PX-760, which controls features such as GigaREC, SilentMode, quality checks. According to Alexander Noé, developer of PxScan and PxView, the commands were designed to prevent these features to be used on alternative operating systems and applications. The commands in question are implemented in standard MultiMedia Command Set - 3 (MMC-3) command set, so they are not really secret. However, the drives require retrieving a code and send another one that is calculated from the received one back to the drive, otherwise those commands will be rejected by the drive.

In May 2005, Alexander Noé and Eric Fernandez (under the name zeb), the author of PxLinux, received a letter from a lawyer company based in Brussels, on behalf of Shinano Kenshi, the Japanese company that develops PlexTools and PlexTools Pro, for removing the software. The letter accused zeb and Alexander Noé for:

Using "unfair commercial practices" because they allegedly compared and announced that their software is an alternative for PlexTools.
Harming the company's "good name and fame" because of the alleged comparisons between PxScan and PlexTools.
Infringing various intellectual rights of the company, including "The right of reproduction, translation, adaptation, arrangement and any other alteration of a computer program and the reproduction of the results thereof as well as the right to control all and any form of distribution and dissemination. Infringement of the author rights (and where applicable, copyright) in relation with protected interfaces. The trademark of the company".

Furthermore, when using PX-755/760 firmware versions 1.0.4 or above, third party tools can no longer detect the result of the using bitsetting commands.