Iometer write-performance analysis
Reading is only one facet of performance. Let's turn our attention to writing speed.| IOMeter - 64KB sequential write speed | ||
|---|---|---|
| Samsung Spinpoint F1-DT 750GB | Intel X25-M SSD 80GB | Corsair P256 SSD 256GB |
| 66.63 | 70.52 | 156.58 |
Going back to the 64KB block size, the sequential write speed of the Corsair P256 is excellent, easily beating both comparison drives'.
| IOMeter - 4KB random write | ||
|---|---|---|
| Samsung Spinpoint F1-DT 750GB | Intel X25-M SSD 80GB | Corsair P256 SSD 256GB |
| 0.78 | 49.12 | 5.91 |
But what most drives find difficult is in writing small files on a random basis. Intel has tuned the X25-M for excellent small-file performance, clearly shown by the results, but the Corsair's performance is reasonably good for an SSD. Older solid-state drives equipped with JMicron controllers often benchmark at 0.1MB/s in this test, and any drive is only as good as its slowest speed.
| IOMeter - IOPS (write) | ||
|---|---|---|
| Samsung Spinpoint F1-DT 750GB | Intel X25-M SSD 80GB | Corsair P256 SSD 256GB |
| 198.54 | 12575 | 1511.93 |
No surprises here, either.
| IOMeter - average write latency | ||
|---|---|---|
| Samsung Spinpoint F1-DT 750GB | Intel X25-M SSD 80GB | Corsair P256 SSD 256GB |
| 15.1 | 0.24 | 1.98 |
| IOMeter - maximum write latency | ||
|---|---|---|
| Samsung Spinpoint F1-DT 750GB | Intel X25-M SSD 80GB | Corsair P256 SSD 256GB |
| 1034.61 | 93.36 | 27.94 |
Latency - or lack of - is very good on the SSDs.
