Uninterruptible Power Supply and Backup

how to find out what it is waiting for

When looking at the process with "ps ax" the stat column is "Dl" which means "uninterruptible sleep (usually IO)". Is it possible to find out more details on what the process is

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An uninterruptable power supply (UPS) is a type of backup battery that will continue to provide electrical power to the electronics that you have plugged into it even if electricity from your

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An uninterruptible power supply, or UPS, is basically a surge protector, battery, and power inverter — which turns the battery''s stored energy into usable power — in one.

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Uninterruptible power supply FAQ

With a wide range of cost-effective models available, a UPS system is an essential investment to prevent damage, data loss and downtime caused by power problems. A UPS ensures that

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The best UPS battery backups offer enough power and protection to keep your devices running well when there''s no power. Here are our recommendations based on expert

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Our pick for the best UPS overall goes to the APC BR1500G Backup Battery. At 1500VA/865W, it can power most devices, including computers, external hard drives, and

How to create an uninterruptible sleep in C?

0 I''m looking to create a state of uninterruptible sleep for a program I''m writing. Any tips or ideas about how to create this state would be helpful. So far I''ve looked into the

Linux Process States

A process performing I/O will be put in D state (uninterruptable sleep), which frees the CPU until there is a hardware interrupt which tells the CPU to return to executing the

The 7 Best UPS Battery Backups 2024

Beyond just keeping your devices running, the best UPS battery backups also shield sensitive electronics from potentially damaging power surges and fluctuations

Do we need to call set_current_state (TASK

Yes, you must call set_current_state() before calling schedule(), because otherwise the scheduler will not remove the task from the run queue (if you just want to

How to stop ''uninterruptible'' process on Linux?

I have a VirtualBox process hanging around which I tried to kill (KILL/ABORT) but without success. The parent pid is 1 (init). top shows the process as D which is documented as

Best Uninterruptible Power Supply (UPS) in 2025

An uninterruptible power supply (UPS) helps prevent sudden shutdowns, data loss, and hardware damage by providing backup power when your main electricity fails.

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Backup battery power supply is designed for use during outages and unsafe voltage fluctuations, and provides surge protector with battery backup in the event of damaging power

Why there is a state called ''TASK_UNINTERRUPTIBLE'' in Linux

As you could read from that answer, setting the current process state to TASK_UNINTERRUPTIBLE is needed for make schedule() call, performed by that thread, to

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