If Maxtor started demonstrating PMR technology ((Perpendicular Magnetic Recording) three years and a half ago (news in French), the technology only became massively available in our computers in 2006. Seagate (who in the meantime acquired Maxtor) announced to have sold 16 million PMR hard drives since the introduction of the Momentus 5400.3 2.5", first hard drive of the company using this technology, in December 2005.
Since that date, the market leader made PRM available for entire product line. According to an Analyst of iSuppli, it will represent 75% of the production by the end of the year.
PMR reduces the surface occupied by each byte present on the platters by positioning them vertically instead of horizontally. This increases the number of bits per platter. Beside the density increase, it also leads to higher performances.
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