Ultra 160/m clocking question

Richard Moore r_moore at qlc.com
Thu Feb 11 15:26:25 PST 1999

* From the T10 Reflector (t10 at symbios.com), posted by:
* Richard Moore <r_moore at qlc.com>
Ultra-3 is a STA term defined by a list of features, none of which is
SPI-3 is the T10 draft standard in which those features are described.
which as far as I know is a term not officially sanctioned by either T10 or
describes a specific Ultra-3 profile, namely double-transition clocking wide
transfers (hence 160 MB/s), with the "m" (for "manageability"), referring to
addition of non-packetized CRC and domain validation.

> -----Original Message-----
> From: Alan Littlewood [mailto:alanl at lsil.com]
> Sent: Thursday, February 11, 1999 1:14 PM
> To: Ken Erickson
> Cc: 't10 at symbios.com'
> Subject: Re: Ultra 160/m clocking question
> * From the T10 Reflector (t10 at symbios.com), posted by:
> * Alan Littlewood <alanl at lsil.com>
> *
> Curiosity gets the better of me.
> Can anyone explain what 160/m is?
> How does it differ from Ultra-3/SPI-3?
> If it is different, who created it and where is it documented?
> If there is no difference, why is there a new term?
> Thanks,
> Alan.
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