Yup. Let me break it down:
Fujitsu SAS Drives 36GB:
7.5ms Average Seek Time
**Average Seek Time per Gigabyte: (7.5 * 2) / 36 = 0.4167ms
Caviar Black 1TB:
9.4ms Average Seek Time
**Average Seek Time per Gigabyte: (9.4 * 2) / 333 = 0.0565ms
Also, you should not confuse the term 'seek time' with 'access time'. Seek time is the time it takes the head to move between 2 tracks on the disk. Access time is the time it takes from the drive receiving the request until it delivers the data. It is the sum of the seek time, any settling time (the time it takes the read head to stabilise on the correct track, usually very short), controller overhead and latency due to the spinning disk. This is the value that benchmarking programs can report.
I might be wrong here, but I can't see what use or meaning the term 'Seek Time per Gigabyte' has, because seek time is, by definition, independent of disk capacity and is an absolute measure of the speed of the hdd controller and read/write head positioning system.
As for which disk wil be faster - that is a really tricky one, and I think it depends a lot on what you want to use it for. Movie editing etc, with large sequential transfers, the Caviar drive will destroy the little SAS drive as it can transfer at around twice the speed. I imagine 3 Caviar Blacks will give 8 of these old Fujitsus a good run for the money. However, for random reads the situation might be different. The RAIDed SAS drives will, in my opinion, be quicker in real world use if coupled with a decent controller. As an OS drive they will be very fast, even with the hit in access time that RAID adds.
To be honest though, I think the cost is very high if you only want to use the RAID card in RAID 0 to run the SAS drives for your OS. 2 60GB OCZ Vertex SSDs on motherboard RAID 0 would be cheaper and faster for OS use. I have no experience of the drives, but from what I have read the Vertex's don't suffer from the stuttering that plagues other cheaper drives. As they have built-in cache you don't really need a cache on the RAID controller.
Sorry this got a little long-winded...
Edited by the_beast - 4/3/09 at 1:38am