-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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. On 18/01/16 15:47, Matt Garman wrote:> That's strange, I expected the SMART test to show some issues. > Personally, I'm still not confident in that drive. Can you check > cabling? Another possibility is that there is a cable that has > vibrated into a marginal state. Probably a long shot, but if it's > easy to get physical access to the machine, and you can afford the > downtime to shut it down, open up the chassis and re-seat the > drive and cables. > > Every now and then I have PCIe cards that work fine for years, > then suddenly disappear after a reboot. I re-seat them and they go > back to being fine for years. So I believe vibration does > sometimes play a role in mysterious problems that creep up from > time to time. > > > > On Mon, Jan 18, 2016 at 5:39 AM, Alessandro Baggi > <alessandro.baggi at gmail.com> wrote: >> Il 18/01/2016 12:09, Chris Murphy ha scritto: >>> >>> What is the result for each drive? >>> >>> smartctl -l scterc <dev> >>> >>> >>> Chris Murphy _______________________________________________ >>> CentOS mailing list CentOS at centos.org >>> https://lists.centos.org/mailman/listinfo/centos . >>> >> SCT Error Recovery Control command not supported >> >> _______________________________________________ CentOS mailing >> list CentOS at centos.org >> https://lists.centos.org/mailman/listinfo/centos > _______________________________________________ CentOS mailing > list CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos >-----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAEBAgAGBQJWnXaVAAoJEAF3yXsqtyBlQJ0P/i92NZYQvNiwK3a/jUDJpwcV 7lHGPJzdAFbR2VRTblrvtxWifLle8FhDde7O4zh+3j1R/Jt49f61764eEXAjsP7M xb9JtaPvVxpTNFygqfh9n9/wZkJCmokYFvd8KLWqQuZDqa8R89z/KRM1IxR4W3Ux s+bk5BYTvybRcV+tmhlSOQC0GcZj108b/4Ki2AuHEVTCJQ6TlY/J3cSN/bhmiNcc Tmj3mamgnjmOEdKbtNpbrA3tTvfY1/OY7wqqBYtojaqPKB38RIFhqr0z1bEhkLQy oB3Y4Nw1nW/r+KrFuHE2siBI/qTRR0Pf/RwPU7LLGrsjUgTwygVhp4tivb6wOFgQ YLVJNC8+XdNxYuSrdyvfkCrU1LyW/4HLmaANj78ZjlakB80WNkWmocoJrGBGnp3E 2akAUJV7CS/+xkXMyJuWhkKFjMkjzn+o2TFD9Fw9Re+NNtvmtRSQ54C4zlyXWKOI xxPajRRmHfXQObi0kkGHABZqSUAwXt60YQmalZfKXO8bWE0ySALc0OE9GFjvNh4V tX+PUoKfgtCEoSRMcFIytMJxc46prgS0OakHew0jlBCDOEEl9Kyyo0OsEOy1+jpd hKeVQ66h5+Xv+FqXf/JUQmNO3xo+zUCjIDNIPeQbyLjYNQHicy/WIqZ2kLRKdu1q ZZE5IlmRmnALqLxE5MZd =zUh6 -----END PGP SIGNATURE-----
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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 -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQEcBAEBAgAGBQJWnYXFAAoJEAUijw0EjkDv+4EH/0wbRnoM9KePC0UUhViIdFZ1 cpaVvNqre+zVd6qBhnzbcPT+lXINHZ5Mm/Rw0tcBqx8nYzYab5qS5hTRaZOTm6H/ aXbH6shJC4o1LW/fGDkMZ0V8ZGgz4uN4cdMYN87rVqX+J477Igs3D4yO9Gxux6K7 Eqn3+kBECL5iBiFdOf86H0UoNZuUHkfMpj95R4AJnywTCqB5W1XaVQPViNs/ge16 5Ipk7uopfbREM+F60hI889XH3s0eUXabZsTUGJWE/nUd/sNCdnAqBVD3aTuwz6gv sb599qH8AAFX8pz0DloslLVQRb0pExbAHGM/IDMMwi1aJHGtbSDtphrt369aKJo=5+bz -----END PGP SIGNATURE-----
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I suspect that the gold layer on edge connectors 30-odd years ago was a lot thicker than on modern cards. We are talking contacts on 0.1" spacing not some modern 1/10 of a knat's whisker. (Off topic) I also remember seeing engineers determine which memory chip was at fault and replacing the chip using a soldering iron. Try that on a DIMM! On 19/01/16 00:39, Peter wrote:> 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 _______________________________________________ CentOS > mailing list CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos >-----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAEBAgAGBQJWnsboAAoJEAF3yXsqtyBlm3UP/00YVsd3q7lEY1S9fXw/Y5YI uLkfigS6I9/LqVMXL3YT/pmrE745kxROUEfO0qPHDETx2gcjLlq+gOJ1icJMD2sW hn8JY4Pv7IouK4DvZ3hXCIaqQgegsYcqoEi5Ii1F+T+qguS0CHxLqZ98vocPmSnB IOpwId7L5/wgdtsTKgSHcwl2WaEvp2WojOFP7Asv9QbgCxfhpI6AYN3uptjeR0zQ 868Eo5tRoS2g42BijN6PZTc+1HnpFhp/K/Gy/GxzqvBKG+rx/heF4u/xOkCkH78y qbDXVTNcxqr8Uf65302gfGompXPZO56czvMOlxUWcvKU6O2fSlhRfgF1v2XR+7pL jf7E332bSml1W0NlA/fzM9HIXTgX3t+BJ9P0F1wjOLGuXuYf5zvdjXff4yjJlgGC hVc6OEzUZrDM1EAE+Eu8ENqzVg6aTQGm17FkDRuKqVF3XXE4Ok5Pm0+scMjylVRX V0yXKMzRH+T5IUJK6xnFU84Eadr7dl0EUf6f+EX61wDhhUauK3N5XnVNaOZ3dLom fuTjk5Qg+BBHVQPG1/Ud4KK8sEZbB55zc7udinhbh45onn3oUGA4LtoA6wqqgHMJ ue87YC/Y5FPd8G3neei/bVkGrr2EEWgSxJ2PQYxeiXda6trf8nzBNqz7vXK4/mDw fAl4ie58Zd0vGbRAb2hB =iezY -----END PGP SIGNATURE-----