Abstract
This paper demonstrates the hard disk drive (HDD) performance improvement by nonvolatile FeRAM cache. First, the 128 Mb ChainFeRAM¿ design and power supply system design to meet HDD application are presented. Second, the concept of nonvolatile FeRAM cache and the simulated and measured HDD performance improvement are presented. The read/write bandwidth improvements to 1.12 times, 3.3 times and 1.9 times have been obtained by bench mark tests of PC Mark 05 and FD Bench v1.01, and by PC user data for 5 days, respectively. These results have been the same level of or more effective than the results of HDD rotational speed-up from 5400 rpm to 7200 rpm using DRAM cache. The write energy is reduced by 25% in PC Mark05 test.
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