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-<table class="head">
- <tr>
- <td class="head-ltitle">UT(4)</td>
- <td class="head-vol">Device Drivers Manual (vax)</td>
- <td class="head-rtitle">UT(4)</td>
- </tr>
-</table>
-<div class="manual-text">
-<section class="Sh">
-<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
-<p class="Pp"><code class="Nm">ut</code> &#x2014; <span class="Nd">UNIBUS TU45
- tri-density tape drive interface</span></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
-<p class="Pp"><code class="Cd">ut0 at uba0 csr 0172440 vector utintr</code>
- <br/>
- <code class="Cd">tj0 at ut0 drive 0</code></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
-<p class="Pp">NOTE: This driver has not been ported from
- <span class="Ux">4.4BSD</span> yet.</p>
-<p class="Pp">The <code class="Nm">ut</code> interface provides access to a
- standard tape drive interface as describe in <a class="Xr">vax/mtio(4)</a>.
- Hardware implementing this on the VAX is typified by the System Industries
- SI 9700 tape subsystem. Tapes may be read or written at 800, 1600, and 6250
- BPI.</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="DIAGNOSTICS"><a class="permalink" href="#DIAGNOSTICS">DIAGNOSTICS</a></h1>
-<dl class="Bl-diag">
- <dt>tj%d: no write ring.</dt>
- <dd>An attempt was made to write on the tape drive when no write ring was
- present; this message is written on the terminal of the user who tried to
- access the tape.</dd>
- <dt>tj%d: not online.</dt>
- <dd>An attempt was made to access the tape while it was offline; this message
- is written on the terminal of the user who tried to access the tape.</dd>
- <dt>tj%d: can't change density in mid-tape.</dt>
- <dd>An attempt was made to write on a tape at a different density than is
- already recorded on the tape. This message is written on the terminal of
- the user who tried to switch the density.</dd>
- <dt>ut%d: soft error bn%d cs1=%b er=%b cs2=%b ds=%b.</dt>
- <dd>The formatter indicated a corrected error at a density other than 800bpi.
- The data transferred is assumed to be correct.</dd>
- <dt>ut%d: hard error bn%d cs1=%b er=%b cs2=%b ds=%b.</dt>
- <dd>A tape error occurred at block</dd>
- <dt>bn.</dt>
- <dd>Any error is fatal on non-raw tape; when possible the driver will have
- retried the operation which failed several times before reporting the
- error.</dd>
- <dt>tj%d: lost interrupt.</dt>
- <dd>A tape operation did not complete within a reasonable time, most likely
- because the tape was taken off-line during rewind or lost vacuum. The
- controller should, but does not, give an interrupt in these cases. The
- device will be made available again after this message, but any current
- open reference to the device will return an error as the operation in
- progress aborts.</dd>
-</dl>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
- ALSO</a></h1>
-<p class="Pp"><a class="Xr">vax/mt(1)</a>, <a class="Xr">vax/mtio(4)</a></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
-<p class="Pp">The <code class="Nm">ut</code> driver appeared in
- <span class="Ux">4.2BSD</span>.</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="BUGS"><a class="permalink" href="#BUGS">BUGS</a></h1>
-<p class="Pp">May hang if a physical error (non-data) occurs.</p>
-</section>
-</div>
-<table class="foot">
- <tr>
- <td class="foot-date">February 17, 2017</td>
- <td class="foot-os">NetBSD 10.1</td>
- </tr>
-</table>