dd Command Results on 16GB SCSI Disk

We did dd test by transferring 2GB files from or to /dev/null, /dev/zero and timing it. Some test results are:

Read rate:
Small block: bs=32k : 36.29MB/s
Large block: bs=512k : 34.05MB/s
Average: 35.17MB/s

Write rate:
Small block: bs=32k : 41.24 MB/s
Large block: bs=512 : 33.33 MB/s
Average: 37.29 MB/s