Article View: comp.arch.storage
Article #110Re: Questions on Tape Drives
From: Peter Reilley
Date: Tue, 15 Sep 1992 12:27
Date: Tue, 15 Sep 1992 12:27
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uncal@talgras.UUCP (Al Amet) writes:
>Actually you never want the tape to touch the head with any of them. The
>object is to have just a few molecules of air between the head and the tape.
>I use to have a chart that showed objects in reference to a 1/4" cartridge
>head. A human fingerprint was several times the thickness of the distance
>between the head and the tape. Head design is an art. The object is to
>keep the tape wrapped around the head as close as possible without it
>touching.
All tape drives have their heads in contact with the media.
The chart that you have describes disk heads, which do float on a
thin layer of air. The only flexible media system that I am aware of
that does use floating heads is the Bernouli drive. In tape drives
the head does wear because of the media contact. Hard disk
heads do not wear while the drive is running.
--
>>>>>>>>>>>> Peter Reilley ..... pvr@wiis.wang.com ..... KA1LAT <<<<<<<<<<<<<
Well, that about says it.
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Path: arc1-ca.pugleaf.net!sparky!uunet!usc!rpi!bu.edu!wang!pvr From: pvr@wang.com (Peter Reilley) Newsgroups: comp.arch.storage Subject: Re: Questions on Tape Drives Message-ID: <bumda6.b0h@wang.com> Date: 15 Sep 92 12:27:41 GMT References: <44671@ucbvax.BERKELEY.EDU> <269@talgras.UUCP> Organization: Wang Labs, Lowell MA, USA Lines: 19