Version: 2.0.4-1

reopen 358696 !
retitle 358696 Avoiding halt and rebooting blindly is dangerous
severity 358696 grave
found 2.0.4-1
thanks

The proposed solution endangers data and hardware, thus the grave severity.

1. The UPS may take more than 15 minutes to shutdown the load.  You cannot
assume things like this, and you will cause data loss if you get it wrong:
the power-off could come with the system fully online.

2. Not powering off the box by itself (read: allowing halt and the kernel to
do its job and cut power cleanly) means it will be subject to high
transients when the UPS shuts down the load.  This will, in turn, make it
worse for the other loads that have not been properly shut down.  It would
be a disaster in a server farm.

3. Non-controlled shutdowns are *very* bad for all hardware, including
desktop systems.  For starters, all disks will be subject to emergency head
unloads.  The halt utility does a lot of work-around on kenrel bugs to make
sure disks are parked, RAID arrays are in read-only mode or shutdown, etc
for a damn good reason.

4. It is very probable that in any non-home scenarios, an UPS will protect
more than one equipment.  In those scenarios, the UPS is configured to NOT
accept "immediate shutdown the load" command from any of the equipments,
just from the main controller host.  Nut is geared to work fine and
specifically support such configurations.  This has to be taken into
account.

Thus, implementing the work around proposed in this bug report as a default
behaviour is not acceptable.  Please revert the change, or make it optional,
and *not* enabled by default.   I would go even further and actively
discourage heavily the use of this option, as it can damage the hardware.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh


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