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[Freeipmi-devel] Re: ipmi sensor thresholds
From: |
Anand Babu |
Subject: |
[Freeipmi-devel] Re: ipmi sensor thresholds |
Date: |
Mon, 09 Aug 2004 16:43:00 -0700 |
User-agent: |
Gnus/5.1006 (Gnus v5.10.6) Emacs/21.3 (gnu/linux) |
Latest update on "SDR#12 Proc Bd sensor ALERT" issue:
=====================================================
BUG:
----
Most SR870BN4 (Tiger4) systems's Proc Bd sensors exceeds normal
min/max limits.
Example
12: Proc Bd +1.2V (Voltage): 1.22 V (low=1.18/nom=1.20/high=1.21)
Solution:
---------
After carefully going through the IPMI specification, I now
understand that interpreting normal min/max fields to calculate
ALERT status is a BUG. Also current health-check routine interprets
to only {OK, ALERT, FAILED} values. This is wrong.
FIX:
----
Correct implementation should interpret {non-critical, critical and
non-recoverable} threshold limits to calculate {OK, Non-critical,
Critical, Non-recoverable, Unspecified fault, Unknown} states.
Available limits:
- Nominal reading
- Normal maximum
- Normal minimum
- Sensor maximum reading
- Sensor minimum reading
- Upper non-recoverable threshold
- Upper critical threshold
- Upper non-critical threshold
- Lower non-recoverable threshold
- Lower critical threshold
- Lower non-critical threshold
Possible states:
[OK] - monitored parameters within normal operating
ranges
[Non-critical] - `warning': hardware outside normal operating
range
[Critical] - `fatal' :hardware exceeding specified ratings
[Non-recoverable] - `potential damage': system hardware in
jeopardy or damaged
[Unspecified fault] - fault detected, but severity unspecified
[Unknown] - status not available/unknown
Interpretation rules:
[OK] : < non-critical
[Non-critical] : => non-critical < critical
[Critical] : => critical < non-recoverable
[non-recoverable] : => non-recoverable
Because sensors readings in SR870BN4 exceeding normal min/max limits
falls under [OK] state according to specs, there is no need to fix SDR
firmware. How ever we will continue to develop "sdr-ed" tool as a part
of the GNU FreeIPMI project for completeness.
--
Anand Babu
Free as in Freedom <www.gnu.org>
- [Freeipmi-devel] Re: ipmi sensor thresholds,
Anand Babu <=
Re: [Freeipmi-devel] Re: ipmi sensor thresholds, Albert Chu, 2004/08/18
Re: [Freeipmi-devel] Re: ipmi sensor thresholds, Albert Chu, 2004/08/18
Re: [Freeipmi-devel] Re: ipmi sensor thresholds, Albert Chu, 2004/08/18