disk or cable error? (CAM status: ATA Status Error)

[ixbug at riseup.net]

SMART long test returned with no errors on both disks:

Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended offline    Completed without error       00%      2861         -


next I'm going to replace the cable.