A CF card is slower than a HD. I use SYSINFO 3.24 to benchmark the speed with my Kingston CF Card and a 170 MB 2.5 " HD from Seagate.
The HD has a benchmark of 620 kb/s and my Compact flash 524 Kb/s.
SysInfo is not the best bench mark program to test the speed of your Hard drive.
You could better format you Micro drive with fast format or try it format on a PC with Winuae.
