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I am seeing these errors:

sd0(ahc0:1:0): ABORTED COMMAND info:20080 asc:47,0 SCSI parity error 
field repla
ceable unit: 3
, retries:4
sd0(ahc0:1:0): ABORTED COMMAND info:30050 asc:47,0 SCSI parity error 
field repla
ceable unit: 3
, retries:4
sd0(ahc0:1:0): ABORTED COMMAND info:30050 asc:47,0 SCSI parity error 
field repla
ceable unit: 3
, retries:4
sd0(ahc0:1:0): ABORTED COMMAND info:30050 asc:47,0 SCSI parity error 
field repla
ceable unit: 3
, retries:4
sd0(ahc0:1:0): ABORTED COMMAND info:30050 asc:47,0 SCSI parity error 
field repla
ceable unit: 3
, retries:4
sd0(ahc0:1:0): ABORTED COMMAND info:30050 asc:47,0 SCSI parity error 
field repla
ceable unit: 3
, retries:4

On an ST32155N hard drive. Adaptec disk verify finds no problems.

Any idea what is happening, and how it can be fixed on a production system?

Thanks,

Jerry.