I found this nice hdd test program called Crystal Disk mark:
http://crystalmark.info/software/CrystalDiskMark/index-e.html
I took it for a drive, and got these scores:
X-25m:
Sequential Read : 238.817 MB/s
Sequential Write : 86.588 MB/s
Random Read 512KB : 170.613 MB/s
Random Write 512KB : 86.189 MB/s
Random Read 4KB : 21.700 MB/s
Random Write 4KB : 58.070 MB/s
Test Size : 100 MB
Date : 2010/02/17 0:12:06
seagate 7200 rpm:
Sequential Read : 62.959 MB/s
Sequential Write : 56.911 MB/s
Random Read 512KB : 32.822 MB/s
Random Write 512KB : 30.712 MB/s
Random Read 4KB : 0.514 MB/s
Random Write 4KB : 0.908 MB/s
Test Size : 100 MB
Date : 2010/02/17 0:38:49
What do you guys think?