Re: twinax cards

I was thinking some pc twinax emulation cards might have
problems with the new controllers, but nobody has mentioned,
other than Scott's comment on enhanced options.
Rob - your comment about a prev release "did not have the
strength on twinax that the older ones had" had more to do with
many non ibm devices not being "fully compatible". IBM was able to
turn up the twinax xmit rate for better performance. All the IBM
twinax devices and emulation cards did fine. Some non-IBM did
not (had a hardware mfgr actually send in a line analyzer to figure it out).
And weak twinax connections without good grounding fell also.
Same thing happened during S38 - AS400 twinax migration.
 jim

----- Original Message ----- 
From: <rob@xxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Sent: Wednesday, February 25, 2004 2:06 PM
Subject: Re: twinax cards


> I think others have answered more succinctly than I on the other benefits,
> tangible and otherwise, of moving from twinax.
>
> However as far as OS upgrades go...
> There was a newer version of hardware many years ago that did not have the
> strength on twinax that the older ones had.  In other words, if you had
> some marginal wiring that barely worked, or just occasionally gave you
> fits, then upgrading to that hardware was going to lower your tolerance
> level.  I don't remember what level of OS that the old hardware supported.
>  Or otherwise how to tell if you are running that older stuff.
>
> I think you already have enough ammo to stray from twinax.  Don't have
> them delay the move from that obsolete version of OS any more by giving
> them any sort of ammo.
>
>
> Rob Berendt
> -- 
> Group Dekko Services, LLC
> Dept 01.073
> PO Box 2000
> Dock 108
> 6928N 400E
> Kendallville, IN 46755
> http://www.dekko.com
>
>
>
>
>
> "Jim Franz" <franz400@xxxxxxxxxxxx>
> Sent by: midrange-l-bounces@xxxxxxxxxxxx
> 02/25/2004 12:09 PM
> Please respond to
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>
> Is anyone still using twinax cards at v5r2?
> Any problems?
> Upgrading customers from v4r4 and trying
> to convince them to give it up.
> jim
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