<div dir="ltr"><div>If you get PCS errors during moderate or heavy disk I/O it means there is probably too much electrical cross talk or noise on the SATA link. Probably a cabling issue. Either the cable is not shielded or the cable is going through an enclosure connector and not directly connected to the drive. Sometimes sub-stanadard motherboards have cross talk on the traces (though it is rare). Sometimes sub-standard hot-swap bay enclosures have similar issues. More likely the cable is not shielded. If it is a mobo issue you can try connecting the cable to a different SATA connector.<br><br></div><div>Transient PCS errors are fairly serious if they occur at times other than when you are inserting or removing a drive from a hot swap bay.<br></div><div><br></div>-Matt</div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jun 30, 2015 at 5:38 AM, Mohammad BadieZadegan <span dir="ltr"><<a href="mailto:mbzadegan@gmail.com" target="_blank">mbzadegan@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hi everybody,</div><div>I installed DF-BSD 4.2.0 and while I standby or installing any tools the message of <b>ahci0.4: Transient Errors: 40<PCS> (7)</b> notify me more times!</div><div>What's the matter? If no problem how can I disable that?</div><div>Thanks.</div></div>
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