HDTune score is lower for faster drive

This is the HDTune benchmark for my Hitachi 7K200 200GB.


and this is the benchmark for Hitachi 7K320 320GB somebody else has posted.


How come the access time of the bigger drive is slower? Both drives are 7200 RPM and both have 2 platters so the bigger drive is supposed to have faster access time since it has higher data density per platter.

 

Could it be a random fluke... most of the other numbers showed a decent improvement in performance. Have you tried running the program again?

 

Acces times usually get higher on larger drives. More data leads to more seek time.

Hitachi 7K100 had even better acces times.

 

Saw the same thing between my hitachi 7k320 (320gb) and 7k200(100gb). I doubt you will notice the difference in real life performance. I don't.

 

My 7K320 has a single platter and it has a seek around 14.9ms.
My 7K100 had a seek around 12.7 or something like that.
As the data density increases so does the seek times

K-TRON

 

Would the slower seek time negate the higher performance from higher transfer rate?

 

In most cases no,
When I upgraded from the 7K100 to the 7K200 drive I noticed a very nice performance increase. The data bandwidth nearly doubled from 34mb/sec to 52mb/sec.
Upgrading from the 7K200 to the 7K320 was not all that much of an upgrade since 52mb/sec to 60mb/sec was not a big jump.
The seek times were faster on the 7K100, but both my 7K200 and 7K320 loaded files much faster than my 7K100 did.

K-TRON