[mythtv-users] Anyone using SSD for long term storage?

Stephen Worthington stephen_agent at jsw.gen.nz
Wed Jul 23 16:32:12 UTC 2014


On Wed, 23 Jul 2014 12:14:50 -0400, you wrote:

>On a side note to all this: I've been a hacking coughing mess (yay vacay
>summer cold) and hadn't felt like opening up the box. So I've done some
>checks from command line and did a late nite sudo reboot to see if the
>drive came back. It didn't.
>
>Just now realized I hadn't done a hard shutdown and power up. The drive is
>back. I'm currently identifying what needs to be duplicated as must keep
>(news segments I'm in for example) and what's "meh, it's just TV" to at
>least have an immediate sense of backups to my desktops, externals etc.
>Looking at raid for my wishlist. Thanks to all for the great thoughts and
>advice in this thread.
>
>BTW, what causes a drive to just disappear until a hard reboot?

All sorts of things can cause that.  You can blame a passing cosmic
ray, if you feel like it.  A cosmic ray hit in many types of buffer
circuit can cause the circuit to lock into a single state and be
unable to switch states until the substrate power is removed for a
while.  If the buffer is one in the path that commands take to the
disk, a stuck bit like that can easily stop it responding at all until
a power cycle.  Static electricity can do the same, either a discharge
or a field effect from moving something too near that has a big charge
on it.  So a drive that stops responding once like that may never do
it again.  Or it may be a sign of a real problem and it is going to do
it again very soon.

I was taught to always suspect the cable first - try replacing it, and
check the connectors on the drive and SATA port and clean them if
necessary.

Since you said you were away from home when it happened, one thing
that happens when a house is locked up is that it can get considerably
hotter (and colder) than when occupied.  The more extreme temperatures
can bring out existing faults, especially in connectors and cables.


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