X-bit labs

Promise FastTrak TX4300 Serial ATA RAID Controller Review (page 6)

Category: Storage

by Alexander Yuriev , Nikita Nikolaichev

[ 10/20/2005 | 04:09 PM ]

Performance in Intel IOMeter FileServer and WebServer Patterns

At first let’s check the controller performance in the file-server storage subsystem:

Let’s build a graph showing the dependence of the arrays speeds on the request queue depth:

Since the share of writes is only 20%, all arrays demonstrate pretty good results. The performance of RAID 0 arrays proves very scalable depending on the number of HDDs involved. The mirrored RAID 1 and RAID 10 arrays are notably faster than a single HDD and a RAID 0 array of 2 HDDs respectively.

For a better comparison of different RAID arrays performance we will use our traditional rating system. Provided all workloads are considered equally probable, we will calculate the general performance rating index as the average performance during requests processing under all types of workload:

RAID 0 arrays made of 3 and 4 HDDs take the first two lines of our ranking system, and RAID 1 and RAID 10 appeared far ahead of the single hard disk drive and a RAID 0 array of 2 drives, correspondingly.