major pita w/LSI Tyan TA26 combo

Freddie Cash fcash at
Mon Mar 6 08:48:57 PST 2006

On Monday 06 March 2006 08:34 am, you wrote:
> Freddie Cash schrieb:
> > On Sunday 05 March 2006 08:48 am, Vivek Khera wrote:
> >>Interesting... They never said that to me.  I have an issue with an
> >>external Dell Powervault array that always reports failure of
> >>whatever is in position 0 once the array is active.  It will format
> >>it, etc. without failure.  If I swap the channels on the 320-2X card,
> >>the error stays with position 0 on the array.  If I drop the channel
> >>down to U160 from U320, no errors.  This leads me to believe that the
> >>backplane of the array box is not up to spec for U320.

> > Is that connected to a riser card that is connected to the
> > motherboard?

> > We only have problems when the MegaRAID card is plugged into a riser
> > card. When it's plugged directly into the motherboard, it runs
> > perfectly.

> We used to have problems with adapters running at 66MHz or more
> using risercards in a number of Tyan S2707. Those risercards came
> from Chenbro, along with the cases. By replacing them with Tyan
> risercards (which became available a few months *after* the boards)
> those problems vanished.

> And now comes the interesting part: Months later, problems began to
> reoccur. In the end we found out that the power supplies were of
> somewhat low quality. Replacing the power supply helped in every
> system that was affected.

Interesting. I'll have to mention that to our system builder as something 
to inverstigate and to watch out for.

Although, in our case, replacing the MegaRAID cards with Escalade cards 
(still plugged into the same riser card) fixed all our issues.
Freddie Cash
fcash at

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