[GLLUG] Odd SATA Issue - slightly OT

Ken Smith kens at kensnet.org
Mon Dec 24 22:15:09 UTC 2018

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

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