HAB

HAB utility allows to test the HDD performance when working with data blocks of different size.

WD VelociRaptor:

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.