Path: utzoo!mnetor!uunet!husc6!mit-eddie!uw-beaver!tektronix!reed!omen!caf
From: caf@omen.UUCP (Chuck Forsberg WA7KGX)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Hub ring on HD floppies
Message-ID: <626@omen.UUCP>
Date: 28 Dec 87 19:01:07 GMT
References: <415@wa3wbu.UUCP> <3209@batcomputer.tn.cornell.edu> <1345@uhccux.UUCP> <868@neoucom.UUCP>
Reply-To: caf@omen.UUCP (Chuck Forsberg WA7KGX)
Organization: Omen Technology Inc, Portland Oregon
Lines: 25
Keywords: floppies

:Unfortunately, it still doesn't explain why HD disks don't have hub
:rings!!
:

Every HD drive I have seen has an "anti-scruntch" feature that spins
the hub when a diskette is inserted.  This alleviates the need for a
strong (i.e., reinforced) center hole in the diskette.

Two caveats:  1) Make sure the computer is powered up before inserting the
diskette.  2) SLOWLY turn the lever to lock the diskette in the drive,
give it a chance to get up to speed and seat the diskette.

Failure to observe the above cautions has damaged the center hole,
sometimes rendering the diskette unreadable.  Scruntching diskettes
is the DOS analogue to Unix rm -rf /.

Chuck Forsberg WA7KGX Author of YMODEM, ZMODEM, Professional-YAM, ZCOMM, and DSZ
...!tektronix!reed!omen!caf  Omen Technology Inc "The High Reliability Software"
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P.S.: I have seen a few HD diskettes with hub rings.  Conroy-LaPointe
used to sell them.