FreeAXP allows simultaneous access against up to 7 virtual disks. These disks can all exist as container files on a single physical disk on the host system. If you are running an application under FreeAXP that puts high I/O loads on multiple disks, you can easily saturate the physical disk controller, which in turn will adversely impact performance on the FreeAXP system.
To alleviate this problem, spread virtual disks across multiple physical disks if your FreeAXP application is I/O intensive across multiple volumes simultaneously.