Re: [CentOS] HDD badblocks

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On 19/01/16 12:34, J Martin Rushton wrote:

Not new: I can remember seeing DEC engineers cleaning up the contacts on memory boards for a VAX 11/782 with a pencil eraser c.1985. It's still a pretty standard first fix to reseat a card or connector.

I used to do that as well. The contacts would come out nice and shiny when you clean them. Then I found out that what I was actually doing was removing the very thin layer of gold plating on the contacts and revealing the copper underneath. That's why you should never clean contacts with a pencil eraser, just re-seat the boards and they'll make contact again.

Peter