On Tue, 2011-07-19 at 15:19 +0100, Tom De Mulder wrote: > In case people are interested, I ran more benchmarks. The impact of TRIM > on an over-provisioned drive is remarkable: a 25% performance loss when > using Postmark. > > Because this isn't really on-topic for the MD mailing list, I've put it > somewhere else: > > http://tdm27.wordpress.com/2011/07/19/some-solid-state-drive-benchmarks/ > > My next goal, when I have the time, is to compare different amounts of > over-provisioning. There is a paper from Intel "Over-provisioning an Intel® SSD" (analyzing X25-M 160 GB Gen.2 SSDs): http://cache-www.intel.com/cd/00/00/45/95/459555_459555.pdf On page 10 of this Intel presentation they mention that a spare area >27% of native capacity has diminishing returns for such an SSD: http://maltiel-consulting.com/Enterprise_Data_Integrity_Increasing_Endurance.pdf Regards, Werner -- : Werner Fischer : Technology Specialist : Thomas-Krenn.AG | The server-experts : http://www.thomas-krenn.com | http://www.thomas-krenn.com/wiki -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
