My friend claims that dual booting, using two different OSes, requires a multi-core or multi-threaded processor. Is this true?
And if I install additional OSes, will my computer slow down any?
Your friend does not know what he's talking about.
Dual booting can be done on any computer regardless of CPU.
And dual or triple or quadruple booting will not slow your computer down, it only runs one OS at a time.
Dual booting is when you have multiple OS's installed on the same computer and you choose what OS to boot when you power it up.
The only way dual-booting affects the OS running right now is that the other OS takes some disk space. As long as you have enough disk space for both, you're done.
Your friend is incorrect. Dual booting has nothing to do with anything except the boot commands written to the hard drive.
It doesn't matter how many cores your CPU has, physical or virtual. It doesn't matter how many hard drives you have.
Technically, you can run more than one OS even on the same partition, though this usually only works with OSes of the same type, as in 2 versions of windows.
And if you dual-boot, your computer will not slow down. Installing another OS results in more hard drive space used up, but so long as you have sufficient capacity on your hard drive to fit the other OSes, you won't experience any slowdown related directly to the dual-boot configuration.
However, if you're talking of virtualization, which is where some software "pretends" it's another computer an an OS runs inside that software, yes, a multi-threaded, multi-core cpu is much better, and you'll experience a slowdown.
I recommend you do a little research on the OSes you want to run and why you want to run them, and then decide the best way to go about doing it.
The number of processor cores/register sets (HT) cores does NOT in any way determine the number of OS'es you can set up in a multi boot configuration.
As long as the OS can run on a single core, it wont make any difference.
Central Processing Units (CPUs) which are the processors, or the brains, of your computer. Pretty well everything that is processed in your computer, with the major exception of the video processing, is done inside the CPU. That makes the CPU a very critical part of your system. Generally speaking, the faster your CPU can process the data, the faster your system responds and the less time you spend twiddling your thumbs and watching the hourglass.
There is no relation of dual boot with the dual core. In our institute there are still P4 processor are available and still we use
Windows XP and
Linux on them.
Users will notice a serious increase in speed when they go to dual-core, even when running applications that are not "multi-threaded". One core will be dedicated to only running the application and the other core will run all the background functions.
You'll see faster response time and generally have a happier computing experience. The only thing is that the processors can increase the performance of software and can boot fast.
Your friend is wrong. In my work laptop I have 2 OS, windows and linux and I access any file in the computer from both. It has no impact in performance. Just have to take care that if you mount a partition in one you or your OS has to unmount it before you move to the other OS or it will inaccessible.