Today I poked around looking at specs of SSD's and 7.2krpm SATA hard disks. I just sampled a bunch of whitepapers on various drives and averaged the results together. Also, when there wasn't an apples-to-apples measurement to compare, I had to calculate, as evidenced by the IOPS versus avg seek time.
The comparisons were pretty surprising, to me - Sustainable reads: SSD somewhat faster (avg 199MB/s compared to avg 126 MB/s) Sustainable writes: SSD equal to SATA (avg 124MB/s compared to avg 126 MB/s) MTBF: SSD equal to SATA. 1.17 vs 1.20 million hours Read latency: SSD way faster (0.16ms vs 8.5ms) (which I derived from 6300 IOPS and 8.5ms avg seek time) Write latency: SSD somewhat slower (12ms vs 8.5ms) (which I derived from 84 IOPS and 8.5ms avg seek time) Actually, I'm not sure how fair the MTBF is. Because a SATA drive will eventually fail just from being powered on, while the life of a SSD is basically determined by how much you write to it.
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