Question for phy event counters

Elliott, Robert (Server Storage) Elliott at hp.com
Tue May 23 07:50:33 PDT 2006


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The original REPORT PHY ERROR LOG has four saturating counters for those
events.  These are mandatory.
The new REPORT PHY EVENT INFORMATION has four wrapping counters for those
same events.  These are optional.  Wrapping counters are easier for
multi-initiator systems to track.
-- 
Rob Elliott, elliott at hp.com 
Hewlett-Packard Industry Standard Server Storage Advanced Technology 
https://ecardfile.com/id/RobElliott 
  _____  
From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf Of Lau, Victor
Sent: Tuesday, May 23, 2006 8:16 AM
To: t10 at t10.org
Cc: Lau, Victor; Seto, Pak-lung
Subject: Question for phy event counters 
In sas2r04 spec page 103, it states the following events should use the
saturating counters
Phys shall count the following events using saturating counters and report
them in the Protocol-Specific Port
log page (see 10.2.8.1) and/or the SMP REPORT PHY ERROR LOG function (see
10.4.3.6):
a) invalid dwords received;
b) dwords received with running disparity errors;
c) loss of dword synchronization; and
d) phy reset problems.
However, on p.104, table 24, these 4-events are using counter type "wrapping
counter"
Thus, which type of counter we should use?
Thx
Victor



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