Question for phy event counters

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

Formatted message: <A HREF="r0605232_f.htm">HTML-formatted message</A>
Attachment #1: <A HREF="r0605232_smime.p7s">smime.p7s</A>

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 
Hewlett-Packard Industry Standard Server Storage Advanced Technology 
From: owner-t10 at [mailto:owner-t10 at] On Behalf Of Lau, Victor
Sent: Tuesday, May 23, 2006 8:16 AM
To: t10 at
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 and/or the SMP REPORT PHY ERROR LOG function (see
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
Thus, which type of counter we should use?

More information about the T10 mailing list