I presume that this is the first time that you have tried running a Scandisk on this drive?
The error is caused by the cluster size being invalid in relation to the size of the partition. It generally happens if you use a ghostlike app to clone a smaller disk onto a larger one, and the cluster size of the smaller one is carried over.
Options are to recreate and reload the partition, or use a program like Partition Magic to resize the clusters.
http://support.microsoft.com/default...;en-us;q229154WDC Knowledge BaseTo be able to boot from the floppy, the A: drive must be before the C: drive in the BIOS.
Change this, boot to the A: drive and then run Scandisk. When you ran it from the Command prompt, it was still running under Windows.