Checklist of actions from minutes and meeting reminder
Bob Snively
Bob.Snively at Eng.Sun.COM
Fri Aug 4 17:17:32 PDT 1995
To: Distribution
From: Bob Snively
Date: August 1, 1995
Subject: Teleconference on SFF-8045, -46, -47, and -48, August 1
GENERAL DISCUSSION AND ACTIONS:
1) 8046 and 8048
Provide explicit wording indicating drives are required
not to have terminations.
"The drives shall not provide termination."
Done
2) 8045 and 8047
Pull-ups have to be provided by or through backplane.
No passive will be provided on the drive for the ID signals.
8045 Done
8047 Done by reference
3) Glossary for backplane
Be sure that everyone understands that backplane means
on or through the backplane, since the actual signals may
be connected to the backplane connector by some other
mechanism.
Done for 8045, 8046, 8047, (inclusive in unchanged text for 8048)
4) 8047
SER_DATA shall be moved from pin 9 to pin 37.
Done
5) Current conventions
Specified at connector, drive current available or
drive current needed. Positive is into drive.
Alvin's text is modified to read.
"Tables specify the voltage and/or current...
Done
6) 8045, Section 6.4.7.1
Alvin's and Dal's suggested wording is corrected and
moved to section 6.4.7 to describe and separate
the two functions and their optional and non-optional
selection before the two sections which actually
describe the functions.
8045 Done
It is suggested that the wording include the definition
of this signal as an open collector or other circuit
without an active pull-up. The pull-up must be >= 10 K.
8045 Done
7) 8045, Section 6.4.9
No change right now in the electronic information.
8045, 8047 Note added.
The bypass will remain active until the drive has
performed appropriate internal initialization and
has met the requirements of any states established
by MODE SELECT or other commands.
8045, 8047 Done
Remove last two lines of table 6-9.
8045, 8047 Done
8) Management of bypass circuits
After considerable discussion, we decided to leave this
out for now.
9) Section 7.1
Accepted
8045, 8047 Done
10) Pat Edsall's request that short/long pins be specified on backpanel
Accepted
8045, 8047 Done
11) Table 6-5, note by Alvin
Include 3.3 as possible voltage for 6.4.5
8045, 8047 Done
12) Which document to update
Snively document is base, Allan document is guide.
13) The next meeting will be:
Thursday August 10 in Tarrytown. It will be a breakfast meeting
in the hotel dining room starting at 7:30. It will consider
the "final" documents which will be finished sometime this week.
ACTION ITEMS:
Jim Coomes: To provide improved wording for
section 6.4.8 to include characteristic
impedance and coupling properties of
FC signals.
Attendees:
Mike Nemeth DEC CO Springs
Dan Colgrove IBM SJ
Alvin Cox Seagate OKC
Gene Milligan Seagate OKC
Pat Edsall HP Boise
Robert Mejia HP Boise
Jim Coomes Seagate MN
Bob Snively Sun Menlo Park, CA
Jim Espy Clarion Boston
Ed Gardner Quantum CO Springs
ITEMS NOT INCLUDED BUT COMMENTED UPON:
Cox comment:
8045:
__________________________________________
6.4.7.1 SEL_n Function:
Paragraph immediately preceding TABLE 6-7:
"The pull-up resistor is on the backplane and has a value appropriate to limit
the required assertion drive to less than the specified Iol."
Should state: "The backplane shall provide the appropriate HIGH or LOW state
to the disk drive."
__________________________________________
6.4.7.1, 8047
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