Felix Miata wrote:
Once I partitioned a disk in 20 or 30 partitions, and tested speed on all of them. The faster region was about 1/3 of the disk. It was slower at the end of the disk than at the start; that I expected, but not that it would be faster at 1/3.
Confirmed via observation here, closer maybe to 25%, but clearly slower
#1 on http://fm.no-ip.com/PC/bench/Sysbench/resul603.txt looks like the only such doc I saved. Note on its #2 the difference between front and middle is very small. All others I checked at http://fm.no-ip.com/PC/bench/Sysbench/ are fastest at front. Most of these were done shortly after receiving a new HD, prompting to test to see what speed to expect. ISTR seeing it happen more than once though. Otherwise I don't think I'd have remembered it ever happening.
Just thought of something. Did you go from the beginning of the first partition or the beginning of the disk? Be default, or unless you've gone for DOS compatible partitioning, the first partition won't be track-aligned due to the boot sectors. Then usually, people (or software) opts for nearest track for end of 1st partition, so further partitions are aligned. It would make a slight difference, but the head would have to move over a track mid-read -- to read any track in the first partition, if such a situation were in place. I know when I partitioned with fdisk, I had to toggle a flag to make sure it was dos compat, otherwise, I got the use of 200 and some odd more sectors out of the first partition. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org