Non-Volatile File System: Difference between revisions

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'''Non-Volatile File System''' (''NVFS'') is a [[Flash memory#Flash_file_systems|flash memory file system]] introduced in the release of [[Palm, Inc.|Palm's]] latest [[Personal Digital Assistant]] handheld models [[Tungsten T5]], [[Tungsten E2]], [[TX (handheld)|Palm TX]], [[Z22 (handheld)|Z22]], [[Treo 650]]/[[Treo 700p|700]]/[[Treo 680|680]]/[[Treo 755p|755p]], and [[Palm Centro]].

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'''Non-Volatile File System''' (''NVFS'') is a [[Flash memory#Flash_file_systemsFlash file systems|flash memory file system]] introduced in the release of [[Palm, Inc.|Palm's]] latest [[Personal Digital Assistant]] handheld models [[Tungsten T5]], [[Tungsten E2]], [[TX (handheld)|Palm TX]], [[Z22 (handheld)|Z22]], [[Treo 650]]/[[Treo 700p|700]]/[[Treo 680|680]]/[[Treo 755p|755p]], and [[Palm Centro]].

==Background==

===Overview of NVFS===

The NVFS, as claimed by palmOne, is a file system designed to keep all information safe should the battery run out of power. Previous non-flash memory designs would lose all stored data in the event of a power loss. ''NVFS'' is a derivative of [[Flash Memory]], which continually stores all data even when no power is applied. palmOne invented NVFS in response to complaints that a handheld's data was destroyed when the battery power ran out. In the past, it was necessary to keep the handheld continuously charged to avoid losing data, since all information was stored in volatile memory.

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===Controversy and unfavorable remarks from power users===

Because the NVFS File System was designed to use clusters of 512 [[byte]] blocks, power users have complained that files take approximately 33% more space than in volatile file systems. In fact a volatile file system uses a block size of only 14 bytes, compared to the NVFS File System minimum block size of 512 bytes. [[Palm, Inc.|palmOne]] responded to this complaint by offering a free 128 [[megabyte]] [[Secure Digital Card|SD Card]] on request to selected customers [http://www.pcworld.com/news/article/0,aid,118736,00.asp]. At the NVFS Early Release, Palm (at the time palmOne) would commit itself to work on a ROM Flash Update to reduce the overhead of the NVFS Architecture. Currently, as of this update, ''all'' Palm-branded products using NVFS, if not then almost all, should be shipped with the NVFS Fix already installed. (The Tungsten E2 uses 4kb blocks.) (It is recommended those having earlier versions of the Palm Treo 650 and Tungsten T5 install the NVFS Fix at the earliest possible convenience). Such controversy gave the [[Tungsten T5]] and the [[Treo 650]] unfavorable remarks from power users.{{factcitation needed|date=April 2012}}

===Later developments===

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==External links==

*[http://kb.palmone.com/SRVS/CGI-BIN/WEBCGI.EXE/,/?St=9,E=0000000000049298597,K=6406,Sxi=3,useTemplate=Case.tem,CASE=38949 palmOne Treo 650 Updater Information regarding about NVFS Features]

*[http://www.palmone.com/us/support/downloads/tungstent5/tungstent5update.html palmOne Tungsten T5 Version 1.1 Update]--Also—Also updates Garnet to 5.4.8.

*[http://kb.palmone.com/SRVS/CGI-BIN/WEBCGI.EXE?New,Kb=PalmSupportKB,ts=Palm_External2001,case=obj(13069) palmOne Tungsten T5 new features]

*[http://kb.palmone.com/SRVS/CGI-BIN/WEBCGI.EXE?New,Kb=PalmSupportKB,ts=Palm_External2001,Case=obj(34247) palmOne Tungsten T5 KB Article 34247]