SE fast-40 supported in SPI-3 (never mind)

[gop at us.ibm.com]

* From the T10 Reflector (t10 at t10.org), posted by:
* gop at us.ibm.com
*
Sriram, Praveen,

You are right. ST does apply to speeds up to fast-40. I got my STs  and SEs
mixed up. That's a sure sign I have been working too many hours on this.
Now if I could only figure out a way to destroy the first note before
everyone sees it on Monday!!!

Bye for now,
George Penokie

Dept Z9V  114-2 N212
E-Mail:    gop at us.ibm.com
Internal:  553-5208
External: 507-253-5208   FAX: 507-253-2880



Praveen Viraraghavan <Praveen.Viraraghavan at wdc.com> on 11/26/99 02:53:50 PM

To:   George Penokie/Rochester/IBM at IBMUS, srirams at propwash.co.lsil.com
cc:   t10 at t10.org
Subject:  RE: SE fast-40 supported in SPI-3




* From the T10 Reflector (t10 at t10.org), posted by:
* Praveen Viraraghavan <Praveen.Viraraghavan at wdc.com>
*
George,

     I also agree with Sriram.  This table pertains to ST timings.  The SE
timings apply until the Fast-20 part of the table and figure.  If you
remove the Fast-40, then there is nowhere in SPI that the timing for LVD
ST Fast-40 are described.

thanks

pv



Praveen Viraraghavan
ASIC Design Engineer
Western Digital - Enterprise Storage Group
WORK: (507) 286-7668
CELL: (507) 269-4312
FAX: (507) 286-7079
praveen at wdc.com


----------
From:     Sriram Srinivasan[SMTP:srirams at propwash.co.lsil.com]
Sent:     Friday, November 26, 1999 2:22 PM
To:  gop at us.ibm.com
Cc:  t10 at t10.org
Subject:  Re: SE fast-40 supported in SPI-3

* From the T10 Reflector (t10 at t10.org), posted by:
* Sriram Srinivasan <srirams at propwash.co.lsil.com>
*
     I wish to stand up (and be stoned if I happen to be wrong! :).

     Doesn't the information in table 31 and figure 49 pertain to ST
transfers rather than JUST SE?  So when u do Fast-40 transfers w/ LVD
devices u
would use those values, would u not?  Am I right or do I deserve to be
stoned?!?

     -Sriram
---------------------------------------------------------------------------
----
Sriram Srinivasan,
ASIC Design Engineer, LSI Logic,         Phone : (970) 206 5847
2001 Danfield Ct., Ft. Collins, CO 80525      FAX   : (970) 206 5244
---------------------------------------------------------------------------
-----

>
>* From the T10 Reflector (t10 at t10.org), posted by:
>* gop at us.ibm.com
>*
>OK now that I have your attention.
>SPI-3 has all the timing values that would be required to support a SE
>version of a fast-40 SCSI device. If you don't believe me look in table
31
>and figure 49 which contain information only for SE SCSI devices. Of
course
>this will not work and fortunately table 1 does not allow SE drives to
run
>faster than fast-20.
>Interestingly enough no one pointed this out in there letter ballot
>comments and the only reason I noticed it was because of a comment Gene
>made that annex G was supposed to have been deleted.
>I assume no one has any objection to me removing the fast-40 information
>from table 31 and figure 49 of SPI-3 rev 10!! If they do let them stand
up
>and be stoned.
>
>Bye for now,
>George Penokie
>
>Dept Z9V  114-2 N212
>E-Mail:    gop at us.ibm.com
>Internal:  553-5208
>External: 507-253-5208   FAX: 507-253-2880
>
>
>*
>* For T10 Reflector information, send a message with
>* 'info t10' (no quotes) in the message body to majordomo at t10.org
>


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