Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!cbmvax!fred From: fred@cbmvax.UUCP (Fred Bowen) Newsgroups: comp.sys.cbm Subject: Re: Colored diskettes - write protection warning Message-ID: <7177@cbmvax.UUCP> Date: 29 Jun 89 18:21:21 GMT References: Reply-To: fred@cbmvax.UUCP (Fred Bowen) Organization: Commodore Technology, West Chester, PA Lines: 19 In article prindle@NADC.ARPA (Frank Prindle) writes: >I found yesterday, quite to my astonishment, that the infrared LED/photo- >transistor sensors used in some disk drives can "see right through" color >diskette shells such as those used by Sentinel color diskettes. Interesting. I have warned folks in the past about using paper-type write-protect tabs, which can have the same effect. Also, I often find myself working on disk drives with the top case cover removed (imagine that :-). It was not until I wasted a day or two chasing after problems that I discovered the sunlight was effectively "shorting" the write- protect and disk-present photo sensors. And all along I thought I just naturally worked better at night. -- Fred Bowen uucp: {uunet|rutgers|pyramid}!cbmvax!fred arpa: cbmvax!fred@uunet.uu.net tele: 215 431-9100 Commodore Electronics, Ltd., 1200 Wilson Drive, West Chester, PA, 19380