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OtherOS was a feature available in early versions of the PlayStation 3 video game console that allowed other operating systems, such as Linux or FreeBSD, to be installed on the system. This feature was made unavailable in newer models and removed from the oldest ones through a firmware update by Sony. The "Other OS" feature is disabled by firmware version 3.21 but still runs on older consoles that have firmware 3.15 or lower. A class action lawsuit has been filed against Sony for those who wish to pursue legal remedies (see PlayStation 3 system software). The class action lawsuit was dismissed by a federal judge, stating: "As a legal matter, () plaintiffs have failed to allege facts or articulate a theory on which Sony may be held liable." Any Linux operating system had access to 6 of the 7 Synergistic Processing Elements;〔(SPE Access )〕 Sony implemented a hypervisor restricting access from the RSX. IBM provided an introduction to programming parallel applications on the PlayStation 3. ==History== Since 2000, Sony has used the fact that the PlayStation 2 can run Linux in its marketing. They promoted the release of the PS2 Linux Kit, which included a Linux-based operating system, a USB keyboard and mouse, a VGA adapter, a PlayStation 2 Ethernet network adapter, and a 40 GB hard disk drive (HDD). The PlayStation 3 does not have Linux pre-installed. However, Sony included an option in the XMB menu soon after the PlayStation 3 launched that allowed booting into Linux from the hard drive or from a Live CD that the distributor's kernel would boot. The installation manual for the Yellow Dog Linux version for PS3 stated, "It was fully intended that you, a PS3 owner, could play games, watch movies, view photos, listen to music, and run a full-featured Linux operating system that transforms your PS3 into a home computer."〔(【引用サイトリンク】title=Yellow Dog Linux launches for PS3 )〕 When Sony announced the upcoming release of the PS3 Slim in September 2009, they stated that it would not be supporting the OtherOS feature, without offering any explanation for this.〔(【引用サイトリンク】 title=SCEE PS3 Slim press release )〕 In March 2010 Sony announced that the "Other OS" capability of the original PS3 models would be removed due to security concerns in PS3 Firmware 3.21 on April 1, 2010.〔(【引用サイトリンク】 title=PS3 Firmware 3.21 Coming April 1st )〕 Several methods of bypassing the updating and retaining the ability to sign into PSN have been discovered, most of which involve using third party DNS servers.〔http://3004.pokemonger.com/showthread.php?tid=21〕 George Hotz claims to have created custom firmware for the PS3 called 3.21OO that re-enables OtherOS and has published a video of his Custom Firmware as proof.〔(【引用サイトリンク】title=OtherOS Supported on "3.21OO" )〕 Despite the release of a YouTube video which apparently demonstrates the use of his custom firmware, some in the online community claim that this custom firmware was in fact a hoax.〔(【引用サイトリンク】 title=Hacker Claims To Have Linux Working (Again) On PS3 )〕 On July 14, 2010, Hotz announced that he would not bring out his custom firmware to the PlayStation 3.〔(【引用サイトリンク】 title=Geohot Bids Farewell; No 3.21OO For You! )〕 On April 27, 2010 a class action lawsuit was filed in California. The lawsuit claimed that the removal of the OtherOS feature was "unfair and deceptive" and a "breach of good faith".〔http://ia331218.us.archive.org/2/items/gov.uscourts.cand.226894/gov.uscourts.cand.226894.1.0.pdf〕 Most of the filing relates to violation of various consumer protection laws relating to the removal. Several other lawsuits were also filed and are somewhat similar in nature but are filed by other individuals.〔(【引用サイトリンク】 publisher = IGN = 2010-05-07 )〕 In January 2011, Sony sued Hotz and members of failoverflow for their jailbreaking of the PS3. Charges included violating the DMCA, the CFAA, copyright law, and California's CCDAFA, and for breach of contract (related to the PlayStation Network User Agreement), tortious interference, misappropriation, and trespass.〔(Sony follows up, officially sues Geohot and fail0verflow over PS3 jailbreak ). Nilay Patel, Engadget (2011-01-12). Retrieved on 2011-02-16.〕〔See also :File:sonyvhotz.djvu〕 In February, 2011, U.S. District Judge Richard Seeborg dismissed most of the class claims with leave to amend, finding the plaintiffs failed to state a claim. Seeborg stated: "While it cannot be concluded as a matter of law at this juncture that Sony could, without legal consequence, force its customers to choose either to forego installing the software update or to lose access to the other OS feature, the present allegations of the complaint largely fail to state a claim. Accordingly, with the exception of one count, the motion to dismiss will be granted, with leave to amend." On May 4, 2011, Youness Alaoui from the PS3MFW team announced〔(Tweet ) from Youness Alaoui〕 the release of a modified PS3 firmware that allows running OtherOS.〔(OtherOS++ ) at gitbrew.org〕〔(【引用サイトリンク】title=With PSN still down, hackers return Linux to the PlayStation 3 )〕 On December 8, 2011, U.S. District Judge Richard Seeborg dismissed the last remaining count of the class action lawsuit, stating: "As a legal matter, () plaintiffs have failed to allege facts or articulate a theory on which Sony may be held liable." As of January 2014 the U.S. Court of Appeals for the Ninth Circuit partially reversed the dismissal and have sent the case back to the district court.〔(【引用サイトリンク】title=Appellate Court Puts PS3 Class Action Lawsuit Back in the Game )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「OtherOS」の詳細全文を読む スポンサード リンク
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