On 07/12/2013 01:00 PM, Paul Smith issued this missive:
On Fri, Jul 12, 2013 at 8:54 PM, Reindl Harald <h.reindl@xxxxxxxxxxxxx> wrote:
I am experiencing the following problem while booting Fedora 19:
smpboot: CPU2: Not responding.
The computer seems to be blocked. Is there some way of rebooting it
without having to power off the computer?
https://www.kernel.org/doc/Documentation/kernel-parameters.txt
nosmp [SMP] Tells an SMP kernel to act as a UP kernel,
and disable the IO APIC. legacy for "maxcpus=0"
however, if one CPU or core doe snot respond
all the time assume your hardware is dying
Thanks, Reindl. The issue was caused by the fact that I rebooted the
computer without having disconnected the external disk before. Since a
hard power off, the computer has worked just fine. But I was keen to
avoid the hard power off, as someone told me that it is maleficent for
the hard drive. However, it seems that that opinion is not unanimous
according to the discussions I have consulted meanwhile -- many claim
that a hard power off is pretty safe regarding hardware.
Power cycling (more specifically thermal cycling) is harder on the
hardware than simply leaving it on. In my 35+ years in electronics,
generally if a piece of equipment is going to die, it's going to do so
during power up or a really big swing in temperatures (such as the loss
of aircon in a data center). I will say this observation is completely
empirical and I can't back it up with hard numbers, but it is my
experience.
The occasional hard, poweroff boot shouldn't be a big deal and you may
never experience a failure because of it. I have, which is one reason
my systems at home never get powered off other than when I perform
maintenance on them. I do turn off monitors and the like, but they're
cheap to replace if they croak compared with my computers and the data
contained thereon (and yes, I back up religiously).
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- Rick Stevens, Systems Engineer, AllDigital ricks@xxxxxxxxxxxxxx -
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- "Daddy, why doesn't this magnet pick up this floppy disk?" -
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