`<div dir="ltr">I had this exact same problem recently when setting up a new home server... same controller, same firmware (P20). The errors were on all disks attached to the controller, but only on high read activity. Writes did not generate the errors. I downgraded the firmware to P18 (which is what we are using at work) and the errors went away. Has anyone had success with this controller and the P20 firmware?<div><br></div><div>Aaron</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Nov 25, 2014 at 8:30 AM, Filip Marvan <span dir="ltr"><<a href="mailto:filip.marvan@aira.cz" target="_blank">filip.marvan@aira.cz</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Dan,<br>
<br>
thanks for reply.<br>
Yes, errors are on all 5 disks in the same RAIDZ pool. No problem on other<br>
disks in different pool but on the same SAS cable.<br>
So maybe I only had bad luck with that disks.<br>
<span class="HOEnZb"><font color="#888888"><br>
Filip<br>
<br>
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