Jochen Spieker wrote: > Bob Proulx: > > The referenced thread has much good information concerning trim (aka > > the discard option) and I recommend reading through the entire thread. > > You are fine with trim enabled. In some cases using trim may help. > > In some cases using trim may hurt. I haven't enabled it on my main > > laptop. I am using a high quality SSD that has a signfican't amount > > of internal over-provisioning. > > What's "significant"? I would say the Intel 320 series is significant. I happen to know a few of the folks that that worked on it and they were rather proud of that drive when it released. Those are the ones with the non-power of two sizes such as 120G, 240G, 600G and so forth. Of course memory is actually in a binary power of two. Plus there is additional space too. All of the extra space not advertised to the consumer is available as over-provisioning. I have one of the 600G drives and it has been a great performer for me. And so that is what I mean when I say a high quality drive. It was so much faster than the spinning hard drive that I replaced that I simply stopped there. > Wait a minute … yes, that's the article I am thinking of: > http://www.anandtech.com/show/6489/playing-with-op The Intel S3700 you referenced in the Anandtech review has 264G of capacity internally but only advertises 186G of it to the consumer. The remaining 78G is internally available for over-provisioning. I would say that is quite significant. It looks like it was the reference system in the benchmarks above. It does look like the cheaper OCZ and Samsung drives benefited from the free space. I guess that knocks them down out of the high quality drive and into the mid quality section. (shrug) > If you use TRIM (either using the discard mount option or using fstrim > regularly), your usable spare area is manufacturer spare area plus free > space on your filesystem. If you don't use TRIM (and don't keep > unpartitioned space), your spare area is only as large as what the > manufacturer intended it to be. Agreed. But it adds complexity. It has to work bug free. And performance is still quite good without it. Bob
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