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.
Ben Bullard
ben79
--------------------
OpenMandriva-QA Team
On 12/25/2016 05:19 PM, Tomasz Paweł Gajc wrote:
Dnia niedziela, 25 grudnia 2016 16:58:19 CET Ben Bullard pisze:
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.
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
There was a kernel-firmware (20161225) update
today I hoped would address this but it didn't.
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
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