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computers / comp.sys.ibm.ps2.hardware / Re: In through the out door [SCSI over Ethernet]

In through the out door [SCSI over Ethernet]

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From: ohland@charter.net (Louis Ohland)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: In through the out door [SCSI over Ethernet]
Date: Wed, 7 Jul 2021 06:56:46 -0500
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by: Louis Ohland - Wed, 7 Jul 2021 11:56 UTC

Folks, one of my many delusions has been Ethernet over SCSI, trying to
beat Fast Ethernet out of the Corvette.

Many moons ago, Lorenzo sendt me a Microtest DiscPort, a neat-o little
box that has a 10Mbit BNC / RJ45 port that disgronifies the phlogistron
and outputs SCSI-1 over a DB25F port [sigh]. It is sordid like NAS, but
in the mid to late 90s.

Reminds me of a solution looking for a problem [to MY needs, that is].
It gets SCSI over Ethernet, but now you need an external SCSI device to
actually USE it. But... can we switch hit and transmit Ethernet [TCP/IP]
over SCSI?

Not much documentation. Later versions did NT.

Is there some bi-curiosity about seeing feelthy-feely pictures of the
lone PCB?

MICROTEST CD-ROM NETWORKING WORKGROUP SOLUTIONS

DiscPort
https://web.archive.org/web/19970416085230/http://www.microtest.com/html/cdrom_workgroup_main.html

NCR 53C80E [SE] mfd 9507
https://datasheet.datasheetarchive.com/originals/distributors/Datasheets-111/DSAP0032062.pdf

Resistor network and a PTC "sandwich", I would SWAG it's autoterm?

DB25 port, sigh...

80C188XL-12

20.000 MHz osc

DP83902AV
https://datasheet.datasheetarchive.com/originals/distributors/Datasheets-22/DSA-423390.pdf

CS83C92A-CL
https://datasheet.datasheetarchive.com/originals/scans/Scans-029/ScansU3X847.pdf

Re: In through the out door [SCSI over Ethernet]

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Subject: Re: In through the out door [SCSI over Ethernet]
From: wbstclarke@gmail.com (WBSTClarke)
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by: WBSTClarke - Wed, 7 Jul 2021 17:08 UTC

On Wednesday, 7 July 2021 at 13:03:15 UTC+1, Louis Ohland wrote:
> Folks, one of my many delusions has been Ethernet over SCSI, trying to
> beat Fast Ethernet out of the Corvette.
>
> Many moons ago, Lorenzo sendt me a Microtest DiscPort, a neat-o little
> box that has a 10Mbit BNC / RJ45 port that disgronifies the phlogistron
> and outputs SCSI-1 over a DB25F port [sigh]. It is sordid like NAS, but
> in the mid to late 90s.
>
> Reminds me of a solution looking for a problem [to MY needs, that is].
> It gets SCSI over Ethernet, but now you need an external SCSI device to
> actually USE it. But... can we switch hit and transmit Ethernet [TCP/IP]
> over SCSI?
>
> Not much documentation. Later versions did NT.
>
> Is there some bi-curiosity about seeing feelthy-feely pictures of the
> lone PCB?
>
> MICROTEST CD-ROM NETWORKING WORKGROUP SOLUTIONS
>
> DiscPort
> https://web.archive.org/web/19970416085230/http://www.microtest.com/html/cdrom_workgroup_main.html
>
>
> NCR 53C80E [SE] mfd 9507
> https://datasheet.datasheetarchive.com/originals/distributors/Datasheets-111/DSAP0032062.pdf
>
> Resistor network and a PTC "sandwich", I would SWAG it's autoterm?
>
> DB25 port, sigh...
>
> 80C188XL-12
>
> 20.000 MHz osc
>
> DP83902AV
> https://datasheet.datasheetarchive.com/originals/distributors/Datasheets-22/DSA-423390.pdf
>
> CS83C92A-CL
> https://datasheet.datasheetarchive.com/originals/scans/Scans-029/ScansU3X847.pdf

SCSI-2 (and above) defines a "Communications Device" class:
https://www.staff.uni-mainz.de/tacke/scsi/SCSI2-18.html

All you'd need would be an SBC with onboard SCSI-2 and Fast Ethernet and related firmware/OS and drivers.
However, that's not a "simple" project.

Re: In through the out door [SCSI over Ethernet]

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From: ohland@charter.net (Louis Ohland)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: Re: In through the out door [SCSI over Ethernet]
Date: Wed, 7 Jul 2021 12:36:38 -0500
Organization: csiph.com Internet News Service
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by: Louis Ohland - Wed, 7 Jul 2021 17:36 UTC

The DiscPort XL [IIRC] has HPDB50 ports, might be SCSI-2.

Looking for a SIMMple device. The abortive NetVista 8364 projekt crashed
and burnt [possible board-level failure]. Some sordid internet device...

On 7/7/2021 12:08, WBSTClarke wrote:
> SCSI-2 (and above) defines a "Communications Device" class:
> https://www.staff.uni-mainz.de/tacke/scsi/SCSI2-18.html
>
> All you'd need would be an SBC with onboard SCSI-2 and Fast Ethernet and related firmware/OS and drivers.
> However, that's not a "simple" project.

Subject	Author
In through the out door [SCSI over Ethernet]	Louis Ohland
Re: In through the out door [SCSI over Ethernet]	WBSTClarke
Re: In through the out door [SCSI over Ethernet]	Louis Ohland