Patches and discussion for Ensoniq VFX family

i purchased 2 disks with the sequencer o/s (one with 1.37 the other with 2.10)

when i load them into the drive they spin for about 10 seconds then the screen reads bad 
directory.  when i try to reload the screen reads not formatted.  subsequent attempts to 
reload will read not formatted until i re-power the synth and the cycle of bad directory then 
not formatted starts again.

because my sd is o/s 2.0 i decided to try formatting the 1.37 disk.... the drive lights up and 
the disk spins for a good long time then reads disk not formatted.

these disks i assume are 720 mb because they have 1 hole only.

the seller of the disks is sending another copy, but i'm curious if there are any diagnostics for 
the disk drive.  i'm assuming the drive is working as i get no other messages on my screen,

any suggestions?  

ps - i'm mac based not pc