Path: utzoo!attcan!uunet!wuarchive!mailrus!accuvax.nwu.edu!tank!eecae!netnews.upenn.edu!dsl.cis.upenn.edu!catone From: catone@dsl.cis.upenn.edu (Tony Catone) Newsgroups: comp.sys.ibm.pc Subject: Re: Disk Driver Formatting in Message-ID: <14789@netnews.upenn.edu> Date: 27 Sep 89 19:00:04 GMT References: <89090607413782@masnet.uucp> Sender: news@netnews.upenn.edu Reply-To: catone@dsl.cis.upenn.edu (Tony Catone) Organization: University of Pennsylvania Lines: 31 In article <89090607413782@masnet.uucp> jf.messier@canremote.uucp (JF MESSIER) writes: >I also have a problem with the DOS 4.01 : I have installed it on my >system because I just got a 400 MEGS CDC hard disk with ESDI disk >controller. Since that, I have a problem reading my 3 1.2 diskettes. It >seems to be a "classical" problem since it was covered in some >conferences on FidoNet about a year ago. Here's the problem : > > I have a 3.5 " disk drive that can read 720K and 1.44M diskettes. It >is installed as the drive A: on my system. When I start the system, the >first diskette I read in this drive via aDIR command will have the >proper directory, but any other diskette read later will give me the >SAME directory as the first one, even if it's another. It seems that DOS >cannot re-read the FAT and DIR sectors. The diskettes I tried are both >formatted in DOS 3.3 and DOS 4.01. . . . . >. . . The only >"patch" I found was using Pc-Tools to copy the files over a 1.2M floppy I noticed the same problem on an AT&T 386 box that one of our faculty started using. Doing a CHKDSK after changing disks read in the correct (new) directory information; this fix occurred to me because I used a variation of it to do something similar in MS-DOS 2.05 on DEC Rainbows some years back. We are currently not sure why the problem occurs. If anyone has some ideas, I'd love to hear them. By the way, yes, I know, running chkdsk each time is also a pain, but maybe you can pretend you've got a CP/M system again, and treat it like typing Ctrl-C ;-) - Tony catone@dsl.cis.upenn.edu catone@wharton.upenn.edu