3-1/2" Floppy Market Cornered

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Thu May 22 16:35:01 2003

[3" disks]

> But, IIRC, the double sided drives would not let you insert a diskette
> upside down, and therefore were incapable of reading the second side of a

Yes. There's an off-centre notch in the front edge of the disk. On the
double-head drive, there's a metal bracket that slots into this notch
which prevents the disk going in if upside-down.

The better class of single-head drive have an optical sensor to detect
this notch. The In-Use LED is green if the disk is in one way up, and red
if it's the other way up. Or at least the one in my Einstein behaves like

> flippy other than backwards, which was not supported by the controllers.

True :-(

Received on Thu May 22 2003 - 16:35:01 BST

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