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Article #2653

Re: gapless tape

#2653
From: Ed Alsberg
Date: Thu, 01 Oct 1992 18:08
34 lines
1793 bytes
|>
|>Does anyone know how to configure a UNIX workstation to read gapless 
|>magnetic tape?  By gapless I mean
|>physical records that are several million bytes long.
|> 
|>Reading such records requires that the tape controller have a byte count register about 24 bits wide (to
|>hold numbers as big as several million), and direct access to large real memory.  The device driver also
|>must be able to deal with large records.
|>
|>
|>-- 

I don't know alot about this technology, but...
Digital has a device and driver to read/write gapless on 
BI based VAXes running VMS.  The controller is the TM32, the driver
is PLDRIVER.  

On the workstation side, you might contact the following outfit,
who I understand makes a QBUS gapless interfaces.  I don't know if they
supply a UNIX driver, nor do I have their elephone number:

Duplication Technology
Boulder, CO

Good luck.


	   /////////////////////////////////////////////////////
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Message-ID: <1992Oct1.180838.17794@oct17.dfe.dec.com>
Path: arc1-ca.pugleaf.net!sparky!uunet!ogicse!decwrl!pa.dec.com!oct17.dfe.dec.com!csc32.enet.dec.com!e_alsberg
References: <1992Sep30.143758@usho13.hou281.chevron.com>

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Path: arc1-ca.pugleaf.net!sparky!uunet!ogicse!decwrl!pa.dec.com!oct17.dfe.dec.com!csc32.enet.dec.com!e_alsberg
From: e_alsberg@csc32.enet.dec.com (Ed Alsberg)
Newsgroups: comp.sys.dec
Subject: Re: gapless tape
Message-ID: <1992Oct1.180838.17794@oct17.dfe.dec.com>
Date: 1 Oct 92 18:08:38 GMT
Article-I.D.: oct17.1992Oct1.180838.17794
References: <1992Sep30.143758@usho13.hou281.chevron.com>
Sender: news@oct17.dfe.dec.com (Usenet News Account)
Reply-To: e_alsberg@csc32.enet.dec.com (Ed Alsberg)
Organization: Digital Equipment Corporation, Colorado
Lines: 34