[5017] in linux-scsi channel archive
Re: Q: DLT7000 tapedrives under Linux
daemon@ATHENA.MIT.EDU (Jon Lewis)
Wed Oct 28 01:25:55 1998
Date: Tue, 27 Oct 1998 20:24:45 -0500 (EST)
From: Jon Lewis <jlewis@inorganic5.fdt.net>
To: Pieter Krul <pkrul@dare.demon.nl>
cc: Linux SCSI <linux-scsi@vger.rutgers.edu>
In-Reply-To: <363634CE.A88B34F0@dare.demon.nl>
On Tue, 27 Oct 1998, Pieter Krul wrote:
> The DLT7000 drives as I know them are able to write data in
> so called 'streaming mode' at about 5MB/s uncompressed.
>
> The only way I've had the 7000 to work is in the 'normal' tape-
> drive mode, so the drive starts to write, stops, waits a while,
> writes, stops etcetera, so not what it should have done.
>
> The performance of these drives in this way can be called quite
> poorly (1.5MB/s).
With the really fast tape drives, the problem is usually that you can't
give them the data fast enough for them to keep streaming. There is a
program called buffer that can be used to create a large shared memory
buffer that helps. I grabbed my copy from a Debian mirror as
buffer_1.17.orig.tar.gz.
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