1. 2/22 Other data storage methods. Roll call. Video: magneto- optical drives Step-by-step lecture: Zip drives, magneto- optical drives.

2. Part 1: Zip drives & disks Zip drives are a hybrid between floppies and hard drives. Magnetic media Can hold 120 MB. Images courtesy of Cnet.com

3. 1. The Zip media Mylar cookie holds 100 MB. Magnetic coating: S-VHS instead of floppy disk coating. –Harder to magnetize.

4. 2. The Zip heads. 1/10th the size of floppy drive heads. Lightly touch the media. Enter through hole on edge of protective case.

5. 3. The Zip formatting Many more tracks than floppies. (~15 times). Zone recording: all sectors are same size.

6. Part 2: Magneto-Optical drives A hybrid of CD-ROM and hard drives. Magnetically saved data, Optically- locked system.

7. 1. Magneto-Optical Media Crystalline magnetic alloy.

8. 2. Magneto-Optical Writing Laser heats up small section of alloy. Magnet is able to affect the alloy at the elevated temperature.

9. 3. Magneto-Optical Reading Less powerful laser points, Magnetized particles reflect polarized light. Light sensor reads and interprets 0&1.

10. 2/24: Disk compression, defrag, etc. Begin troubleshooting phase of class Have questions ready about hard drive, floppy drives issues and problems. Read pg. 94-101 (ch. 15: “How disk drives increase speed and storage”)