Is rebooting the same thing as cold starting?

I am very, very new to the Mac.
(Most of my experience is with old, non-PC, non-Apple, obsolete computers.)
I have been trying to install Adobe Photo Shop Elements 6, and I am currently running Mac OS X 10.5.4 with 512 mb on an Intel Core Duo at 1.83 GHz.
During the installation process, I get a couple of Photo Shop Elements icons on the bottom toolbar of the desktop, and this appears to be, arguably, normal, but then I get a message that I ought to call Technical Support. About what, Lord knows.
Now, I know that if I let the Mac mini go to "sleep" - after about 30 minutes of continuous inactivity - I can turn off the power strip to the entire computer, and the Mac mini will be completely down. That little LED that looks like it is snoozing, is completely out.
It won't wake up at that point. Not by tapping the keyboard, nor by clicking the mouse.
There appears to be a power button just above the power cord. By pressing this is, you can start the Mac mini back up again.
I assume that it is now doing what we used to call "coldstarting" - but the user's manual doesn't really explain what is being achieved by doing it this way. I don't know if the Mac mini has "nonvolatile" memory, but I'll assume that there is bound to be SOME memory that is nonvolatile, and which does not fade away when you cause the Mac mini to undergo a coldstart. Can anybody comment on this?

Dave Sawyer wrote:
I know that if I let the Mac mini go to "sleep" - after about 30 minutes of continuous inactivity - I can turn off the power strip to the entire computer, and the Mac mini will be completely down. That little LED that looks like it is snoozing, is completely out.
Even after turning the power back on, with hardly more than a tenth of a second, it won't wake up, not by tapping ther keyboard, or by clicking the mouse.
It won't wake up at that point. Not by tapping the keyboard, nor by clicking the mouse.
<snip>
So far as I can tell, my Mac mini does not have a battery inside it. (Maybe I should sink some money into an uninterruptible power supply?) Ever had your house 'blink' for a tenth of a second (or less), and your Mac was in sleep mode? Sure enough, the Mac mini goes out, as it is not that tolerant of a sudden lapse in power. It seems that a fraction of a second is all it takes for a Mac mini to go from 'Asleep' to 'Off.' But your experience may be different from mine.
Macs use an electronic power switch, so if you turn off the power strip, turning it back on will not in and of itself turn the Mac back on. You do indeed have to press the power button on the back of the system.
There you go, it is just as I said.
This is by design and is common to current and recent computers; most have an electronic button that command circuitry rather than being a direct make/break of the power and so require the button to be pressed to start the system.
Well, when the Mac is sleeping, it stands to reason that the harddrive inside the Mac mini has been isolated, the motor is not spinning, and the R/W head (or whatever gizmo it is) has been taken to a safe location. A sudden power surge shouldn't suddenly send a charge to the R/W head or laser, or whatever it is that does the reading of the medium inside the harddrive. If the Mac was sleeping, but I noticed a whirring going on, I sure wouldn't reach for the power strip switch, to turn it off. But that's just me.
If you want to be able to just press a key on the keyboard or move the mouse to bring the computer back into operation, do not use the Shut Down command and do not turn off the power strip. Either let the computer go to sleep on it's own (the time it takes can be set in the Energy Saver system preference) or choose the Sleep command, also under the Apple menu.
Okay.
"Coldstart" usually means starting up a computer from a completely power-down state, as would be the case if you Shut Down your Mac and/or turn off the power strip.
I don't know if the Mac mini has "nonvolatile" memory, but I'll assume that there is bound to be SOME memory that is nonvolatile, and which does not fade away when you cause the Mac mini to undergo a coldstart.
Anything stored on your computer's hard drive will (barring a malfunction of some sort) remain after the power is shut off. There is also some nonvolatile memory that stores the computers power-up information, but in most cases you don't need to concern yourself with that.
Okay.
As to the question you raised in the subject header, "rebooting" usually means restarting the operating system without shutting off power to the computer. This in a Mac is done via the "Restart" command, again under the Apple menu. You'll see this sometimes referred to as a "warm start" as contrasted with a "cold start" where the power to the system is turned off (either via the computer's own power supply or externally as by a power strip).
Message was edited by: Dave Sawyer
Has anybody else beside me had a hard time installing Adobe Photo Shop Elements 6 on a Mac mini running OS X 10.5.4? There seems to be several months intervening between the release of Elements 6, and OS X 10.5.4.

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Is rebooting the same thing as cold starting?

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