Partitioning performance on one disk?

Hi,

I know partitioning improves the performance on large tables.

We have a table of app. 100.000.000 records.
We want to partition the table, but we were wondering if there is still an increase in performance if all the partitions are on the same disk. We want to partition the data per month, but we don't have any disks left were we can spread the partitions.

So my main question is:
Is there still a performance increase when you use partitioning on one disk in stead of multiple disks.

Thx!

Regards Tony

sure. though the gain is maximized when you partition across multiple disks and the system is running on multi cpu.