Disk with read errors, should I replace it ?

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I have a disk in my array with read errors

the first one read error occurred about a two months ago with 174 read errors, no more error appeared until I restarted and upgraded  the server two days ago.
the second time was 16 errors and now it became 176 (although no notification in the web gui appeared this last time)
any way, for my usage ,  this is my most used disk in the array, I don't download anything on it, just moving files with samba, and I seed torrents from it. spindown time is three hours and the disk is not spinning most of the time.

could it be just sata cable bad contact since smart report looks fine to me or is this disk worth replacing ?
here is the smart report


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