EX8200's ( was Re: QBUS Board ID?

From: Richard Erlacher <edick_at_idcomm.com>
Date: Tue Jul 10 17:02:10 2001

I once had one of the Maynard devices you mention. It worked VERY reliably,
even under Win95 with Seagate Backup Executive. Unfortunately, it is limited in
capacity to 5GB per 112 meter tape with software compression. The drive is very
slow with software compression, however, as the overhead drops the rate down
below the streaming rate of common inexpensive SCSI adapters.

Under more or less ideal circumstances, I was able to make the drive stream
(under Win9x) across a 10Mb ethernet, which was adequate at the time for backups
over the ethernet. When software compression was used on a relatively slow
machine, the software compression slowed the transfers down enough that the
drive frequently had to stop, rewind, and start again, lowering the transfer
rate to well under 100KB/sec. This didn't happen with adapters that used DMA
and with machines running faster than 150 MHz. Performance was MUCH better
using DOS backup utilities.

Dick

----- Original Message -----
From: "Jeff Hellige" <jhellige_at_earthlink.net>
To: <classiccmp_at_classiccmp.org>
Sent: Tuesday, July 10, 2001 3:07 PM
Subject: Re: EX8200's ( was Re: QBUS Board ID?


> >At 10:16 PM 7/10/01 +0200, you wrote:
> >>The EXB8200 is a rather strange device. It needs many quirks in the
> >>SCSI driver to work. So it may be plain incompatible with the card. Or
> >>the card wants a very special drive with a special firmware...
> >
> >I've noticed this about the 8200. I've got a CMD card that talks to
> >EX8200s and so I tried it with two of the drives I have here.
>
> I've got an 8200 rebadged as an external Maynard Maynstream
> 2200HS. I used to use it to backup my Amiga's but only one software
> package would even deal with the drive. I've yet to find either a
> Mac or PC backup program that liked the drive, but then again, most
> recent packages don't support it at all. I bought it for like $30
> 6-7 years ago and it had a tape stuck in it. Maynard replaced it
> under warranty and it's seen little use since then due to
> compatibility problems.
>
> Jeff
> --
> Collector of Classic Microcomputers and Video Game Systems:
> Home of the TRS-80 Model 2000 FAQ File
> http://www.geocities.com/siliconvalley/lakes/6757
>
>
Received on Tue Jul 10 2001 - 17:02:10 BST

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