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From: mlr0@bunny.UUCP (Martin Resnick)
Newsgroups: net.periphs,net.wanted
Subject: Re: Need Help with Cipher Microsteamer
Message-ID: <377@bunny.UUCP>
Date: Thu, 13-Mar-86 08:52:54 EST
Article-I.D.: bunny.377
Posted: Thu Mar 13 08:52:54 1986
Date-Received: Sat, 15-Mar-86 18:18:31 EST
References: <1206@mit-eddie.MIT.EDU>
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Xref: watmath net.periphs:1009 net.wanted:8385

> The Cipher documentation indicates that the drive can operate at 25
> ips and 100 ips.  I don't see anywhere how one configures the drive to
> run at the higher speed.  Now it is running (and streaming) at what
> appears to be 25 ips.  How can I get it to go into 100 ips mode?  Is
> this, like the start-stop mode, automatic (i.e. I get Unix to spit out
> data even faster and the drive starts spinning faster) or is there
> something I must do to the drive and/or controller?
> 

Your tape controller must tell the drive to operate at 100ips by asserting
the signal IHISP.

Your software must tell the controller to assert this signal.  Does your
driver support this?  It could be done with an IOCTL or via the minor
device number.