Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!sdd.hp.com!caen!umich!sharkey!cfctech!ttardis!dbl7201
From: dbl7201@ttardis.UUCP (David B Lightstone)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Adaptec AHA-1542a dual SCSI / FDC Controller - FDC Section
Keywords: FDC problem
Message-ID: <2706@ttardis.UUCP>
Date: 11 Mar 91 13:45:52 GMT
Organization: self employed
Lines: 15


I am experiencing a nusance problem which I do not know how to
trouble shoot.

Under DOS I can utilize the controller to read either low (DD) or
high (HD) floppy disks. What I can't do is either read a DD, 
remove it and replace it with a HD and read the HD (and converse).
I have to reboot DOS in order to change floppy disk densities.

Is this a controller problem, a floppy disk configuration problem,
or an known characteristic of the usage of the dual controler.

Any guidance would be approciated. Thanks 

Dave