What's the optimal size of storage devices (disks) to accomplish the acceptable [response time] recommended by SAP. Why the disks of 9 GB are more accepted than the disks of 18 GB and so than the disks of 36 GB?
This is an issue of disk size vs. performance. The more disk heads reading and writing, the better (in general) the performance. While the larger sized disks are more manageable, they have the same number of heads. What the industry is doing though, it increasing the speed (RPMs) on the disks to try and equal out the performance. In addition, many storage providers implement a cache in front of the disks to improve performance.
This was first published in December 2001