<div dir="auto">I also run CentOS 7, and I do get that same message when I am swapping around various USB hard drives. It usually occurs when I use a USB3 capable enclosure on a USB2 port. I've seen this both on my Dell Latitude and Intel server board. I got this quite a bit when I upgraded to two 4tb drives in my server and was copying stuff from the old 1tb drive that I had put in the USB3 enclosure. I did not see any actual data errors.</div><div class="gmail_extra"><br><div class="gmail_quote">On May 18, 2017 10:05 PM, "Joseph Beard" <<a href="mailto:joseph@josephbeard.net">joseph@josephbeard.net</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div>Hello,<br></div>My ThinkPad has recently started exhibiting some odd behaviour that doesn't make sense to me. Occasionally, and seemingly at random, this message will pop up in my terminal:<br><br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">WARNING: Your hard drive is failing<br>Device: /dev/sdc [SAT], unable to open device<br></blockquote><br></div>Normally, I'd take a message like this to mean just that: that my hard drive is failing. But here's the weird thing: there is no `/dev/sdc` in this box. I have `/dev/sda` (a Seagate SSHD), and `/dev/sdb` (an MSATA SSD). I am _occasionally_ connected to a USB HDD, which I believe shows up as `sdc`, but these messages appear when I am not connected and haven't been connected for some time (sometimes hours). I do not have any filesystems mounted on the external when I disconnect.<br><br></div>Just for sanity's sake, I've used `smartctl` to test all three devices and have had no errors reported. I feel I can safely ignore this, because it seems crazy, but I'd <br>really feel much better knowing why it's happening.<br><br></div><div>I'm running CentOS 7. Any ideas?<br><br><br></div>Joe<br><div> <div><div><div><div>--<br clear="all"><div><div class="m_-6937560208424660843gmail_signature">Joseph Beard<br><a href="mailto:joseph@josephbeard.net" target="_blank">joseph@josephbeard.net</a></div></div>
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