<div dir="auto">Great then. Please be aware that tuned is doing a lot optimizations. In my case it was setting APM to low on sata links which reduced performance. Anyways tuned can be adjusted with proper settings. Read manual.</div><div class="gmail_extra"><br><div class="gmail_quote">27.12.2016 12:28 AM "Ben Bullard" <<a href="mailto:benbullard79@cox.net">benbullard79@cox.net</a>> napisał(a):<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<p>I tried throughput-performance, desktop, and realtime and had
same problem with all. Then I tried disabling tuned.service and
that worked in that there are no longer drops or fluctuations in
read speed under hdparm over 10 hour time period.<br>
</p><div class="quoted-text">
<pre class="m_-4151017798622765672moz-signature" cols="72">Ben Bullard
ben79
--------------------
OpenMandriva-QA Team
</pre>
</div><div class="quoted-text"><div class="m_-4151017798622765672moz-cite-prefix">On 12/25/2016 05:19 PM, Tomasz Paweł
Gajc wrote:<br>
</div>
</div><blockquote type="cite"><div class="quoted-text">
<pre>Dnia niedziela, 25 grudnia 2016 16:58:19 CET Ben Bullard pisze:
</pre>
</div><blockquote type="cite">
<pre>Drive in question: Model Family: Crucial/Micron
MX100/MX200/M5x0/M600 Client SSDs
Device Model: Crucial_CT500MX200SSD4
Firmware Version: MU04
Ok, this problem isn't going away. TPG, Colin, Bero, or anyone what logs
or test/commands in addition to omv-bug-report.log do I need to include
for a bug report on this.
</pre>
</blockquote>
<pre>
Hard to say what may be the problem.
Maybe it's related to aggresive APM on your SATA ports.
tuned daemon may interfere here.
take a look on:
tuned-adm active
then change to diffrent profile:
tuned-adm profile throughput-performance
and then run hdparm tests
</pre><div class="quoted-text">
<blockquote type="cite">
<pre>There was a kernel-firmware (20161225) update
today I hoped would address this but it didn't.
</pre>
</blockquote>
</div><pre>
kernel-firmware has nothing to do with firmware with your disk.
On my SSD Samsung EVO 840 on Lx 3.0 i got stable results:
[root@lazur tpg]# hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 762 MB in 3.01 seconds = 253.56 MB/sec
[root@lazur tpg]# hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 778 MB in 3.00 seconds = 259.29 MB/sec
[root@lazur tpg]# hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 778 MB in 3.01 seconds = 258.63 MB/sec
</pre>
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