Not really a question--Just a piece of hardware info
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Earlier this week, I started having problems with the local electricity supplier. My UPS'es kept triggering alarms and it turned out to be the power company lines were delivering over 130V. Called the electric company and they determined that a line voltage regulator had failed. They bypassed the regulator and got my supply voltage down to about 125+- but then it would drop under the 105 volt low limit and cause my UPS'es to go into battery backup mode for a few seconds. So here's the fun part: One of the Windows 10 systems would failed to boot after a shutdown from the UPS---giving me a 0xc000021a stop code. Tried Windows startup recovery, replacing the C drive, restoring backups, etc.---all the standard crap. System would not boot. Tried disconnecting all four external disk drives that were attached via a USB 7 port hub. Still failed. Finally disconnected everything, including internal drives and USB hubs (two attached) --- SYSTEM BOOTED! Went through an isolation procedure to determine what was causing the boot failure. Got it down to one of the USB hubs, which was not plugged into the UPS, had gotten smoked somehow. It still looked like it was working but it caused Windows 10 to fail during the boot process. Who would've thunk a USB hub could cause a boot failure on Windows 10? Microsoft owes me for four days labor and several bottles of antacids.
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Earlier this week, I started having problems with the local electricity supplier. My UPS'es kept triggering alarms and it turned out to be the power company lines were delivering over 130V. Called the electric company and they determined that a line voltage regulator had failed. They bypassed the regulator and got my supply voltage down to about 125+- but then it would drop under the 105 volt low limit and cause my UPS'es to go into battery backup mode for a few seconds. So here's the fun part: One of the Windows 10 systems would failed to boot after a shutdown from the UPS---giving me a 0xc000021a stop code. Tried Windows startup recovery, replacing the C drive, restoring backups, etc.---all the standard crap. System would not boot. Tried disconnecting all four external disk drives that were attached via a USB 7 port hub. Still failed. Finally disconnected everything, including internal drives and USB hubs (two attached) --- SYSTEM BOOTED! Went through an isolation procedure to determine what was causing the boot failure. Got it down to one of the USB hubs, which was not plugged into the UPS, had gotten smoked somehow. It still looked like it was working but it caused Windows 10 to fail during the boot process. Who would've thunk a USB hub could cause a boot failure on Windows 10? Microsoft owes me for four days labor and several bottles of antacids.