[GLLUG] Odd SATA Issue - slightly OT

Ken Smith kens at kensnet.org
Mon Dec 24 22:23:21 UTC 2018

Ken Smith via GLLUG wrote:
> Alain D D Williams via GLLUG wrote:
>> On Mon, Dec 24, 2018 at 08:51:09PM +0000, Greater London Linux UUG 
>> wrote:
>>> Hi Everyone,
>>> I have an older centos 6 system that has 3 sata disks in soft raid5.
>>> I've noticed that the disk performance has become very poor.
>>> I did several "dd if=/dev/sdX of=/dev/null count=10000" tests on the
>>> disks and found one of them performing around 1 MB/s while the
>>> others are at 150 MB/s or more.
>> A cheat fix attempt is to replace the power supply. These tend to 
>> fade over time
>> and can cause disks to play up - however I would have expected to see 
>> errors in
>> /var/log/messages
> Thanks Alain, I hadn't thought of that. I'll measure some voltages 
> first and see what I get.
> :-) Ken
I monitor the voltages and fan speeds, among other things,  with Zabbix. 
Something definitely happened about 10 days ago according to the Zabbix 
records. Thanks :-) Ken

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