HAB utility allows to test the HDD performance when working with data blocks of different size.
The linear read speed in the beginning of the hard drive, with 32KB blocks already, equals 124MB/s. Maximum data transfer rate with the buffer is almost twice as high. These results show that the most optimal Strip size for a RAID 0 array of two WD VelociRaptor drives will be 16 or 32KB: the performance is practically the same in both cases. For our further tests we decided to set Strip at 32KB.
2 x WD VelociRaptor HDDs in RAID 0:
We see the performance dropping when the data block becomes smaller than 32KB, which is a very decent result. Especially if you look at the absolute res speed values that seem simply fantastic for a Serial ATA RAID 0 array built with a chipset controller.