In <[EMAIL PROTECTED]>, on 08/03/2005
at 03:46 PM, "R.S." <[EMAIL PROTECTED]> said:
>I'm too young to use these devices, however I was told what is the
>difference between drum and disk: Drum is ...geometrical drum, active
> surface is on the side, not top/bottom. Disk is thin slice of drum,
>the active surface is on top and bottom circles - like in longplay,
>or CD (with the exception to one spiral track vs concentric circle
>tracks).
The RCA Data Record File ("jukebox") was a disk drive with a spiral
track. As you might guess, it was not speedy.
>Drum was similar to Edison voice recording machine.
Or, more[1] recently, Dictaphone
[1] But still quite old.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO
Search the archives at http://bama.ua.edu/archives/ibm-main.html
