From owner-freebsd-hackers  Wed Mar  4 16:08:41 1998
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From: Simon Shapiro <shimon@simon-shapiro.org>
To: Wilko Bulte <wilko@yedi.iaf.nl>
Subject: Re: SCSI Bus redundancy...
Cc: grog@lemis.com, hackers@FreeBSD.ORG, blkirk@float.eli.net, jdn@acp.qiv.com,
        tlambert@primenet.com, sbabkin@dcn.att.com, karl@mcs.net
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 ...

> Or a FibreChannel array. Will be playing with that for the rest of the
> week.  I'm pretty curious to see how that behaves.

Ah, the first usable and functional disk channel to hit small computers.
The demos I saw several years ago showed over 1,700 TPS to a single drive. 
And it is redundant, EMI/RFI clean, wonderful, and expensive.

 ...

> I don't know if DPT will be part of our product offering. I play with
> what they throw at me ;-) The FC array is cute so I don't complain.

I do NOT work for DPT.  I get generous help when I need it.  But they have
an FCAL HBA someplace.  There was another company in Colorado (?) which had
a controller.  They promised me a card to write the FreeBSD driver, but I
never hear from them anymore.

...

>> the ball on tracking these down but will pick it up soon.  SMP is twice
>> as slow as UP in these tests.
> 
> Somebody/something locking resources? But that is definetely worth
> investigating for SMP users.

Yup.  I never invoked any interest in this phenomenon, other than ``if you
find why, give me the patch''.

Simon


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