Comments on: Better Defrag http://bldwtech.com/2009/01/04/better-defrag/ The blog about mobile tech Wed, 08 Feb 2012 09:57:00 +0000 hourly 1 By: Ian D. Nock http://bldwtech.com/2009/01/04/better-defrag/comment-page-1/#comment-52 Ian D. Nock Wed, 28 Jan 2009 01:11:13 +0000 http://bldwtech.com/?p=193#comment-52 I know the technology and original reasoning for defrag to speed up seek times on mechanical media, but you cannot get away from the issue of file fragmentation which still affects SSDs (<a href="http://www.rtcmagazine.com/home/article.php?id=101053" rel="nofollow">http://www.rtcmagazine.com/home/article.php?id=...</a>) - software still has to run and search for all file parts when accessing and this is a finite, not zero, time period - particularly because in SSDs you have several layers of abstraction (the lower level write mechanism for flash SSDs has wear levelling in operation which means that there is not a contiguous relationship between file and physical memory storage elements). In my situation, the SSD was seriously file fragmented (may files with >1,000 fragments) and so running a standard fragmentation tool was very needed. I would have preferred a tool optimised for SSD defragmentation, but as yet I have not found one.<br><br>That said, I do not recommend continuous or regular defragmentation of SSDs because of the wear issue - only when performance reduction is noted. I know the technology and original reasoning for defrag to speed up seek times on mechanical media, but you cannot get away from the issue of file fragmentation which still affects SSDs (http://www.rtcmagazine.com/home/article.php?id=…) – software still has to run and search for all file parts when accessing and this is a finite, not zero, time period – particularly because in SSDs you have several layers of abstraction (the lower level write mechanism for flash SSDs has wear levelling in operation which means that there is not a contiguous relationship between file and physical memory storage elements). In my situation, the SSD was seriously file fragmented (may files with >1,000 fragments) and so running a standard fragmentation tool was very needed. I would have preferred a tool optimised for SSD defragmentation, but as yet I have not found one.

That said, I do not recommend continuous or regular defragmentation of SSDs because of the wear issue – only when performance reduction is noted.

]]> By: Ian D. Nock http://bldwtech.com/2009/01/04/better-defrag/comment-page-1/#comment-53 Ian D. Nock Wed, 28 Jan 2009 01:09:25 +0000 http://bldwtech.com/?p=193#comment-53 I forgot to mention that there was a marked improvement in performance post defragmentation. I forgot to mention that there was a marked improvement in performance post defragmentation.

]]> By: Ian D. Nock http://bldwtech.com/2009/01/04/better-defrag/comment-page-1/#comment-23 Ian D. Nock Wed, 28 Jan 2009 00:11:13 +0000 http://bldwtech.com/?p=193#comment-23 I know the technology and original reasoning for defrag to speed up seek times on mechanical media, but you cannot get away from the issue of file fragmentation which still affects SSDs (<a href="http://www.rtcmagazine.com/home/article.php?id=101053" rel="nofollow">http://www.rtcmagazine.com/home/article.php?id=...</a>) - software still has to run and search for all file parts when accessing and this is a finite, not zero, time period - particularly because in SSDs you have several layers of abstraction (the lower level write mechanism for flash SSDs has wear levelling in operation which means that there is not a contiguous relationship between file and physical memory storage elements). In my situation, the SSD was seriously file fragmented (may files with >1,000 fragments) and so running a standard fragmentation tool was very needed. I would have preferred a tool optimised for SSD defragmentation, but as yet I have not found one.<br><br>That said, I do not recommend continuous or regular defragmentation of SSDs because of the wear issue - only when performance reduction is noted. I know the technology and original reasoning for defrag to speed up seek times on mechanical media, but you cannot get away from the issue of file fragmentation which still affects SSDs (http://www.rtcmagazine.com/home/article.php?id=…) – software still has to run and search for all file parts when accessing and this is a finite, not zero, time period – particularly because in SSDs you have several layers of abstraction (the lower level write mechanism for flash SSDs has wear levelling in operation which means that there is not a contiguous relationship between file and physical memory storage elements). In my situation, the SSD was seriously file fragmented (may files with >1,000 fragments) and so running a standard fragmentation tool was very needed. I would have preferred a tool optimised for SSD defragmentation, but as yet I have not found one.

That said, I do not recommend continuous or regular defragmentation of SSDs because of the wear issue – only when performance reduction is noted.

]]> By: donor http://bldwtech.com/2009/01/04/better-defrag/comment-page-1/#comment-51 donor Mon, 05 Jan 2009 19:07:30 +0000 http://bldwtech.com/?p=193#comment-51 The irony is, you don't need any defrag on SSD.<br>The point of defrag is to put every part of a file in one place, so that HDD can find the file once, and then read the whole file, rather than search multiple chunks of a single file, splittered across the hard drive. Searching for a file chunk takes time on HDD (the plate has to spin, the magnetic head has to move).<br>On SSD, defrag doesn't give a performance boost. There's no mechanical parts in SSD, so search is instant. The irony is, you don't need any defrag on SSD.
The point of defrag is to put every part of a file in one place, so that HDD can find the file once, and then read the whole file, rather than search multiple chunks of a single file, splittered across the hard drive. Searching for a file chunk takes time on HDD (the plate has to spin, the magnetic head has to move).
On SSD, defrag doesn't give a performance boost. There's no mechanical parts in SSD, so search is instant.

]]> By: donor http://bldwtech.com/2009/01/04/better-defrag/comment-page-1/#comment-22 donor Mon, 05 Jan 2009 18:07:30 +0000 http://bldwtech.com/?p=193#comment-22 The irony is, you don't need any defrag on SSD.<br>The point of defrag is to put every part of a file in one place, so that HDD can find the file once, and then read the whole file, rather than search multiple chunks of a single file, splittered across the hard drive. Searching for a file chunk takes time on HDD (the plate has to spin, the magnetic head has to move).<br>On SSD, defrag doesn't give a performance boost. There's no mechanical parts in SSD, so search is instant. The irony is, you don't need any defrag on SSD.
The point of defrag is to put every part of a file in one place, so that HDD can find the file once, and then read the whole file, rather than search multiple chunks of a single file, splittered across the hard drive. Searching for a file chunk takes time on HDD (the plate has to spin, the magnetic head has to move).
On SSD, defrag doesn't give a performance boost. There's no mechanical parts in SSD, so search is instant.

]]> By: Keith http://bldwtech.com/2009/01/04/better-defrag/comment-page-1/#comment-50 Keith Sun, 04 Jan 2009 23:57:44 +0000 http://bldwtech.com/?p=193#comment-50 I'm trying this defragger but I still have to recommend JkDefrag as the best defrag software I've ever used. Simple, efficient, and no attempt to install Yahoo toolbar. Thanks for the recommendation though. I'm always looking for good system maintenance apps to add to my master Tools list. <a href="http://tr.im/2wxz" rel="nofollow">http://tr.im/2wxz</a><br><br>I really like your blog (just discovered via Friendfeed) you can count me as a subscriber. Thanks<br><br>Tsudohnimh<br>website: <a href="http://Knowthenetwork.com" rel="nofollow">http://Knowthenetwork.com</a><br>follow me on Twitter <a href="http://twitter.com/tsudo" rel="nofollow">http://twitter.com/tsudo</a> <br>connect with me on Friendfeed <a href="http://friendfeed.com/tsudohnimh" rel="nofollow">http://friendfeed.com/tsudohnimh</a> I'm trying this defragger but I still have to recommend JkDefrag as the best defrag software I've ever used. Simple, efficient, and no attempt to install Yahoo toolbar. Thanks for the recommendation though. I'm always looking for good system maintenance apps to add to my master Tools list. http://tr.im/2wxz

I really like your blog (just discovered via Friendfeed) you can count me as a subscriber. Thanks

Tsudohnimh
website: http://Knowthenetwork.com
follow me on Twitter http://twitter.com/tsudo
connect with me on Friendfeed http://friendfeed.com/tsudohnimh

]]> By: tsudohnimh http://bldwtech.com/2009/01/04/better-defrag/comment-page-1/#comment-21 tsudohnimh Sun, 04 Jan 2009 22:57:44 +0000 http://bldwtech.com/?p=193#comment-21 I'm trying this defragger but I still have to recommend JkDefrag as the best defrag software I've ever used. Simple, efficient, and no attempt to install Yahoo toolbar. Thanks for the recommendation though. I'm always looking for good system maintenance apps to add to my master Tools list. <a href="http://tr.im/2wxz" rel="nofollow">http://tr.im/2wxz</a><br><br>I really like your blog (just discovered via Friendfeed) you can count me as a subscriber. Thanks<br><br>Tsudohnimh<br>website: <a href="http://Knowthenetwork.com" rel="nofollow">http://Knowthenetwork.com</a><br>follow me on Twitter <a href="http://twitter.com/tsudo" rel="nofollow">http://twitter.com/tsudo</a> <br>connect with me on Friendfeed <a href="http://friendfeed.com/tsudohnimh" rel="nofollow">http://friendfeed.com/tsudohnimh</a> I'm trying this defragger but I still have to recommend JkDefrag as the best defrag software I've ever used. Simple, efficient, and no attempt to install Yahoo toolbar. Thanks for the recommendation though. I'm always looking for good system maintenance apps to add to my master Tools list. http://tr.im/2wxz

I really like your blog (just discovered via Friendfeed) you can count me as a subscriber. Thanks

Tsudohnimh
website: http://Knowthenetwork.com
follow me on Twitter http://twitter.com/tsudo
connect with me on Friendfeed http://friendfeed.com/tsudohnimh

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