This results in lower seek times to actual data than the benchmarks claim. One final thing - when only part of a drive is in use, the head can stick around closer to where it is needed. That is why hard drives love larger reads/writes, and especially love video work or screen recording. (22-28ms) If it's 2MB, 16ms extra (30-36ms) In the time my drive can read two 4KB files, it can read 2MB of data sequentially. If it's reading 1MB, it will take 8ms extra. Now, if the file is 250KB, because we know the KB/ms speed, we can estimate it will take 2ms extra to read all that data. Reading a 4KB file would take exactly that long. Lets say my drive needs to seek to a file to read it? That will take somewhere around 14-20ms on average. This is important for understanding a drive's performance. If you divide by 1000, you're left with 135 to 150 KB/ms. on the edge my drive is very near 135-150MB/sec. The sequential speeds there actually tell me a surprising amount.
0 Comments
Leave a Reply. |