if i remember correctly, SSD's seek time doesn't exist or it's as fast as the access latency of the drives. read rate can be over 5times than that of performance HDDs(WD blacks and such), and the SSDs stays at it's optimal speeds when its under 80% full also even if it does receive a performance penalty when reaching over 80% it still exhibits performance over that of a raptor's.
other than price/capacity ratio, the SSDs have a bigger advantage over raptors, specially in the realm of performance/watt, especially in laptops they're more practical than raptors.
now the cons of the drives, raptors are susceptible to vibrations, they produce more heat and require more power to operate while ssd's speed deteriorates when contents goes over 80% of the capacity and they're more expensive per capacity.
PS: although the SSD's price per capacity is high, ignoring power consumption ratios, if you factor in the ratio of performance difference then the price becomes ignorable, if SSD's are 5x faster than of a performance HDDs then you divide the price of the SSD by 5, so with a given 150$ for 256gb then you'd have a 30$ for 256gb, scale that by x4 to achieve a theoretical 1TB for 120$, how much was 1TB blacks and raptors again?
tl;dr - SSDs are still the true speed demon, outside of ram-disks at least.
edit: i just checked some reviews and WD blacks peaks at 106MB/s reads and raptors at 125MB/s reads. considering SSDs have over 500MB/s... well i'm redoing the math.
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