Question about Mad Dog Multimedia Dominator (MDED1F) External Floppy Drive

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How is info stored on a floppy disk

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Hi,
This is how it works,

  1. The computer program passes an instruction to the computer hardware to write a data file on a floppy disk, which is very similar to a single platter in a hard disk drive except that it is spinning much slower, with far less capacity and slower access time.
  2. The computer hardware and the floppy-disk-drive controller start the motor in the diskette drive to spin the floppy disk.The disk has many concentric tracks on each side. Each track is divided into smaller segments called sectors, like slices of a pie.

  3. A second motor, called a stepper motorrotates a worm-gear shaft (a miniature version of the worm gear in a bench-top vise) in minute increments that match the spacing between tracks.The time it takes to get to the correct track is called "access time." This stepping action (partial revolutions) of the stepper motor moves the read/write heads like the jaws of a bench-top vise. The floppy-disk-drive electronics know how many steps the motor has to turn to move the read/write heads to the correct track.

  4. The read/write heads stop at the track. The read head checks the prewritten addresson the formatted diskette to be sure it is using the correct side of the diskette and is at the proper track. This operation is very similar to the way a record player automatically goes to a certain groove on a vinyl record.
  5. Before the data from the program is written to the diskette, an erase coil (on the same read/write head assembly) is energized to "clear" a wide, "clean slate" sector prior to writing the sector data with the write head. The erased sector is wider than the written sector -- this way, no signals from sectors in adjacent tracks will interfere with the sector in the track being written.
  6. The energized write head puts data on the diskette by magnetizing minute, iron, bar-magnet particles embedded in the diskette surface, very similar to the technology used in the mag stripe on the back of a credit card. The magnetized particles have their north and south poles oriented in such a way that their pattern may be detected and read on a subsequent read operation.
  7. The diskette stops spinning. The floppy disk drive waits for the next command.
On a typical floppy disk drive, the small indicator light stays on during all of the above operations.

and if i helped u solve ur problem in any way...please help me by clicking on the fixya rating.. 
thank you.

Posted on Mar 10, 2009

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Sabrent external floppy reader is asking me to format my floppy disk. how can a format it without deleting my files on floppy disk?


Your floppy disk drive may be defective. Also, Some floppy drives are manufactured differently. Your best bet is to find another floppy drive to read your floppy disk. You can try to take it to the nearest computer store and ask them to read it for you. If they can read it at the computer store? The Sabrent drive you received if bad. If they cannot read it the floppy is bad. If the floppy is bad you can try to download free data recovery software to attempt to recover your data, files etc. Good luck

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Hello! I have a Floppy Drive FD-235HG-C332 manufacturer TEAC. I want to know what data capacity (Operations modes) has my device: 720Kb, or 1Mb, or 1,44Mb, or 1,6Mb, or 2Mb. There are jampers, placed...


Your TEAC FDD (floppy disk drive) is a Tri-mode device (720 KB, 1.2 MB, and 1.44MB)

The "235" part of the model number indicates the drive's form factor (size) is 3.5 inches.
The "HG" part of the model number indicates that the FDD is a Tri-mode device, with the 3 modes
given above.

The manufacturer notes that it has no jumpers, but every FDD I've ever seen has jumpers for
bus master/slave selection. Either master or slave will work.

Here's the manufacturer's web site URL for your TEAC floppy disk drive:
http://www.teac.com/DSPD/support/floppy_drives/fd235hg_id_your_drive.htm

Here's the info on the NEC FD 1137C drive:
--------------------------------------------------------------
Enclosure Type Internal
Interface Floppy (IDC)
Platform: PC
Technical Features Capacity 1.44 MB,2.8MB,360MB,720KB,1MB,640KB
Minimum System Requirements:
Operating System Microsoft DOS • Microsoft Windows 3.1 • Microsoft Windows 95 • Microsoft Windows NT
Form Factor: 3.5" floppy disk drive

Here's the best info I found on your NEC FD 1137C Floppy disk drive:
http://www.aliexpress.com/fm-store/602209/210081532-394871196/NEC1137C-DATE1992-floppy-Adaptive-720K-1-44M-120M-Capacity-120M-40PIN-Interface-3PIN-Jumper-FD1137C-NEC1137C.html

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Installed new floppy. Set bios. Shows in explorer. After clicking on A drive, get mesage, "Please insert a disk into drive A:" Yes, there is good floppy in drive.


your magnetic head on your floppy disk is dirty.
you can clean it with floppy disk cleaner or open your floppy disk drive and cleaned it manually.
i suggest soft material like cotton and alcohol or other electrical cleaning liquid.
and hope help you.

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UNABLE TO READ A NEW, UNUSED FLOOPY DISK THAT I PUT NEW INFORMATION ONTO. THE ERROR, AS I CALL IT ASK ME IF I WISH TO FORMAT THE FLOPPY. IT REFUSES TO READ THE FLOPPY DISK WHICH HAS MY INCOME TAX INFO...


The disk may have unrecoverable formatting errors making it useless. Or your hardware could be on the failure.

If you absolutely must , try purchasing or borrowing an external floppy drive and try to save the information to the disk on the external drive. If if formats and works then you know your internal floppy drive is bad.

If it has the same problems as formatting it in your internal drive, then the floppy itself is bad.

If I may suggest , in the future it would be wiser to save all your data to a removable USB Flash Drive. They are very very inexpensive and cost a lot less then a box of floppies :)

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