On Tue, 16 Apr 2013, Cory Smelosky wrote:
On 04/16/2013 01:58 PM, David Riley wrote:
Well, unless your DNS server has crashed for some
perfectly valid reason. Say, maybe, the janitor bumped into the server rack and
accidentally ejected a hot-swap drive and caused a kernel panic. I've heard of that
happening (to companies who subsequently either got rack doors or stopped letting the
janitors clean the server room).
I was assuming it was a non-trivial fault. I'm used to DNS servers not failing I
guess. ;)
My home DNS server crashed when my CD-ROM drive failed once...kept running until I tried
to update the zonefile.
HOW DOES A CD-ROM DRIVE SPONTANEOUSLY FAIL?!
Out of the different cdrom drives I've disassembled... dust and dirt, faulty solder
joints, bad electrolytics, failed laser diodes, and poor quality leaf switches. The leaf
switch issue was particularly fun as I had a school with dozens and dozens of Goldstar
branded cdrom drives that would spontaneously and randomly eject their trays. It turned
out the plating on the switches was crap and when the switch wouldn't reliably
register that the tray was closed, the drive would eject the tray. Had they either plated
the contacts properly or had better switch debounce logic the drives probably would have
been fine. In the end, we replaced them all and I kept a half dozen around to tinker with.
This disappeared from the IDE bus during runtime when the drive was completely idle. Tray
still ejects.