Hi Cjay,
Thanks for your reminder.
I have two plan for finding out the root cause:
Plan A)
As you adviced, I have bought a folppy 2 USB disk kits, which is same as Murx did, (refer to Reply #12 of this thead).
then I will make a DOS boot disk , to see if the CF card can be identified.
Plan B)
Several years ago, I had a ZVR with red panel, this is a older type, which is running in DOS system.
There are 2 partitions, one of the partition is intalled DOS and a win 32 sysytem, anther partition is install a instrument software.
I replaced a ZVR disk,with a Fujitsu HDD, 30G Bits capacity.
I remember that the ZVR can identified the new 30G Fujitsu HDD, but the second partition is lost.
As a work arround, I copied all the second partition files to C:\D_Disk, and added a command "Subst C:\D_Disk d:" to AUTOEXEC.bat,
that mean add a visual D disk running, it work fine!
Few days ago, I replaced HDD of new ZVR with blue Panel, with the DOS HDD disk in red paneal ZVR.
I found ZVR worked fine, and just one minor issue: the test data is a little strange, maybe caused by the wrong factory calibration data.
That means the fujitsu 30G HDD can be identified by both ZVRs, the one with red panel and another with blue panel.
I have bought Fujitsu HDD disk, just arrived today. I will try it again as I did before.
any good advice ?
I will update..... stay tuned.
Roger@2018/06/08.