Fwd: Re: OT: Question re: SCO Use

[D . Thomas Podnar]

On Thu, Jun 23, 2005 at 02:18:22PM -0400, Transpower wrote:
> 
> 
> -------- Original Message --------
> Subject: Re: OT: Question re: SCO Use
> Date: 6/23/2005, 2:15 PM
> From: Transpower <transpower at aol.com>
> To: "D . Thomas Podnar" <tom at microlite.com>
> cc: filepro-list at celestial.com
> Organization: Transpower Corporation
> 
> D . Thomas Podnar wrote on 6/23/2005, 1:57 PM:
> 
>   > On Wed, Jun 22, 2005 at 09:28:31AM -0400, Jay R. Ashworth wrote:
>   > > On Tue, Jun 21, 2005 at 09:28:53PM -0400, Jean-Pierre A. Radley wrote:
>   > > > But after tomorrow when OSR 6.0.0 is officially launched, I
> revert to
>   > > > being nought but a consumer of documentation.
>   > >
>   > > Oh: you mean System 5 Release 3.2v6.0?
>   > >
>   > > When *are* they going to finally move up to Release 4?
>   > >
>   > > Oh, "never"?
>   > >
>   > > :-)
>   > >
>   > > Cheers,
>   > > -- jra
>   > > --
>   > > Jay R. Ashworth
>   > jra at baylink.com
>   > > Designer
>   > Baylink                             RFC 2100
>   > > Ashworth & Associates        The Things I
>   > Think                        '87 e24
>   > > St Petersburg FL USA      http://baylink.pitas.com             +1
>   > 727 647 1274
>   > >
>   > >       If you can read this... thank a system administrator.  Or
>   > two.  --me
>   > > _______________________________________________
>   > > Filepro-list mailing list
>   > > Filepro-list at lists.celestial.com
>   > > http://mailman.celestial.com/mailman/listinfo/filepro-list
>   >
>   > Well, histrionics aside, there are a few things to note about
>   > OpenServer 6...
>   >
>   > 1) It is based on SVRV.
>   >
>   > 2) It runs on new hardware up to and including Serial Attached SCSI
>   > (SAS).
>   >
>   > 3) I was able to build an all-SATA solution on it (hard disk, DVD Writer
>   >    and Iomega REV) on a system that the latest Suse (9.3) wouldn't even
>   >    install on.
>   >
>   > 4) It will probably outperform Linux on most network, disk, and
>   >    multi-processing performance tests, AND in real life.
>   >
>   > 5) It will come out of the box more secure than any other shipping OS.
>   >
>   > 6) Linux is backwards compatible to last week. OpenServer 6
>   >    is backwards compatible to Xenix 286. Linux people say "just
> recompile
>   >    and it will all run fine".
>   >    Sure, all your end users can do that.
>   >
>   > 7) Linux will run all your Open Source Applications.
>   >
>   > 8) OpenServer 6 will run:
>   >    all your OpenServer 6 applications
>   >    all your OpenServer 5 applications
>   >    all your UnixWare applications
>   >    all your old SCO UNIX applications
>   >    all your old SCO Xenix applications
>   >    AND
>   >    all your OpenSource applications
>   >
>   > ---
>   > Tom
>   > ---
>   > D. Thomas Podnar
>   > tom at microlite.com         http://www.microlite.com
>   > Microlite Corporation     724-375-6711 Voice
> 
> 
> Tom:  How does serial SCSI and SATA compare in speed with, say, the
> 39320 SCSI?

That's a pretty loaded question.
>From a bus burst performance level, SATA 1 is ~150megabytes per second,
SATA 2 and SAS 1 are ~300 megabytes per second, and of course Ultra 320
is 320 megabytes per second.

Ultra320 is the last generation of parallel technology, and
uses a 68 pin cable, while the serial protocols all use a 4 pin cable.

Lots more issues get added when determining real speed...
Actual performance of device,
Performance of drivers,
ability to stack pipes for more speed (a feature of SAS)
SATA is half-duplex.
SAS is full duplex.

etc.
There are some good whitepapers on the subject.


I think the timeliness and quality of SATA and SAS drivers will be
important as we'll start seeing a transition to these interfaces.


Tom Podnar

> 
> Regards,
> Ron Satz
> Transpower Corporation
> transpower at aol.com, www.transpowercorp
> Commercial and Custom Software Manufacturing Since 1976
> 
> 
> 
> _______________________________________________
> Filepro-list mailing list
> Filepro-list at lists.celestial.com
> http://mailman.celestial.com/mailman/listinfo/filepro-list