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- Newsgroups: comp.sys.ibm.pc.misc,comp.sys.ibm.pc.hardware
- Path: sparky!uunet!spool.mu.edu!umn.edu!umeecs!quip.eecs.umich.edu!joy
- From: joy@quip.eecs.umich.edu (Chien-Chung Chen)
- Subject: Re: Problem with 3.5" floppy drive (help!)
- Message-ID: <1992Dec18.022913.19683@zip.eecs.umich.edu>
- Sender: news@zip.eecs.umich.edu (Mr. News)
- Organization: University of Michigan EECS Dept., Ann Arbor
- References: <1992Dec17.183812.7317@pony.Ingres.COM>
- Distribution: na
- Date: Fri, 18 Dec 1992 02:29:13 GMT
- Lines: 41
-
- In article <1992Dec17.183812.7317@pony.Ingres.COM> bonobo@Ingres.COM (David Victor) writes:
- >I just bought a new 486SX-25 clone system, and I'm pretty happy with it,
- >except for one thing:
- >
- >I do a "DIR B:" (B: is my 3.5" floppy drive) on disk #1, and get a valid
- >file listing.
- >
- >I take out disk #1 and replace it with disk #2, which is known to have
- >different files on it (verified on 2 other machines).
- >
- >I do a "DIR B:" again, and I get the *same* file listing as I had on my
- >disk #1!
- >
- >If I reboot the machine and do a "DIR B:" on disk #2, I see the correct
- >listing of the contents of disk #2 (which again supports my contention
- >that disk #1 and disk #2 have different files on them).
- >
- >In other words, my directory listing is the same for every disk I insert
- >into drive B: forever, until I reboot. Can anyone tell me what's going
- >on? Thanks for any help!!
- >
- >-David Victor
-
- Here, I just give you the experience I had with my old 286. Hope it helps.
-
- I had the same problem with the 1.2 MB floppy drive after about 4 years
- of usage. As I took down the floppy drive, I found dust covered the photo-
- sensor which is used to detect whether a diskette is placed in the drive.
- When the sensor is covered with dust, the computer always thinks that
- there is a diskette in the floppy drive, and cannot detect the change of
- diskette. I fixed this problem by cleaning the sensing path with a cotton
- swab.
-
- Since you mention that your PC is new, probably it's not dust problem.
- Maybe the sensor is not functioning well. Try cleaning the sensor to
- see if things improve. (There are three photo-sensors in the drive,
- if you are not sure which one is for detecting diskette change, clean
- them all.) If this should solve your problem, I guess you have a used
- floppy drive in your new PC.
-
- -- Chien-Chung Chen
-