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.
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. -Matt On Tue, Jun 30, 2015 at 5:38 AM, Mohammad BadieZadegan <[email protected]> wrote: > Hi everybody, > I installed DF-BSD 4.2.0 and while I standby or installing any tools the > message of *ahci0.4: Transient Errors: 40<PCS> (7)* notify me more times! > What's the matter? If no problem how can I disable that? > Thanks. >
