Page 1:Flash-Based Storage's Achilles Heel
Page 2:What Is Flash Memory?
Page 3:Flash Battles Mechanical Hard Drives
Page 4:Flash Vs. Flash
Page 5:SanDisk SATA 5000 2.5"
Page 6:RAID With Flash Hard Drives
Page 7:Benchmark Results
Page 8:Read Transfer Performance
Page 9:I/O Benchmark Results
Page 10:I/O, Continued
Page 11:Application Benchmark Results
Flash Vs. Flash
We already took a look at a 32 GB flash-based hard drive in September 2006. Samsung's flash SSD was equipped with 16 flash memory chips, with 2 Gb of capacity each. Unlike SanDisk's product we received for this review, Samsung used an UltraATA/66 interface. Although this interface isn't particularly slow, it was still fast enough to support the first consumer-type flash SSD; the transfer performance of the Samsung SDD did not exceed a read speed of 50 MB/s and a write speed of 30 MB/s.
|Model Number||-||SATA 5000|
|Capacity||32 GB||32 GB|
|Rotational Speed (RPM)||Flash only||Flash only|
|Available Capacities||-||16, 32 GB|
|Platter||16 x 2 Gb||16 x 4 Gb|
|NV Cache Size||-||-|
|Weight||46 g||94 g|
While the Samsung prototype was encased in a plastic enclosure and was thus extremely light, SanDisk's drive was double the weight (94 g instead of 46 g). Given that high-performance notebooks are the primary market for flash SSDs, the extra weight load is not ideal. However, the SDD5000 also comes in a massive aluminum case.