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  • How OS manage running programs

    - by Vit
    Hi, since windows is multitasking OS, it must somehow switch between processes. But how is it done? Does windows include some kind of breakpoints into running programs, which should switch to other process? Becouse when program is executed, it takes control of CPU. So to enable multitasking OS must include some break instruction into the program. Am I right?

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  • Can unexpected power loss harm a Linux install?

    - by Johan Elmander
    I am developing an application on a Linux embedded board (runs Debian) e.g. Raspberry Pi, Beagle Board/Bone, or olimex. The boards works on an environment that the electricity is cut unexpectedly (it is far complicated to place PSU, etc.) and it would happen every day couple times. I wonder if the unexpected power cuts would cause crash/problem on the Linux Operation System? If it is something that I should worry, what would you suggest to prevent the damages on OS against the unexpected power cuts? PS. The application needs to writes some data to the storage medium (SD card), I think it would not be suitable to mount it as read-only.

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  • Transferring 'Live' Documents to Another Computer

    - by waiwai933
    I was wondering if there was any OS/Application that has some support for transferring a document to another computer without having to save, transfer and then reopen. Basically, is there a way so that if I'm working on my desktop, I can click a button (or something similar) and then have the exact state of that computer/application transferred to another? For example, if I'm writing a document, is there a way to get it to computer B without saving it, putting the file on my flash drive, and having to reopen it? Edit: I just realized that this is possible through the wonderful phenomena known as cloud computing, but this is not the type of solution I'm looking for. Edit 2: I wanted to clarify: By 'save', I meant that I didn't want to have to save it to a special location, be that a (flash) drive or uploading to the web. Saving to the local hard drive is fine (and probably necessary, since technologies such as Bluetooth require the file to be saved somewhere). This is a bit inspired by a scene in Avatar, so I highly doubt that this actually exists... but if it does, I don't want to miss out.

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  • Understanding an Application based on the OS interaction with a Hypervisor

    - by Dewy
    Following I will ask a few specific questions but I will set the stage first. My goal is to monitor Applications in a very odd place - between the OS and a Hypervisor. If you have comments about this probably unachievable goal please do educate me. One good advice or link can save me days of work. Now to my current attempt. I installed on WinXP a VirtualBox (being open-source) and got a guest OS of latest Ubuntu running within. Where should I go next? Can I set the logs to show all memory/CPU/disk instructions of the guest OS? Thanks, Dewy

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  • How to install Win7 over top of WinXP partition?

    - by Zeno
    I have a 2TB hard drive with 2 partitions on it, one a C drive for WinXP and another for extra space. I have a Win7 Pro install DVD and I have formatted that C drive via the DVD; it is now a blank "Primary" partition. I attempted to go through the Win7 setup and install it on that partition, but it's giving me an error: Setup unable to create new system partition or locate existing system partition. See setup log files for more info Googling around leads me to believe the entire drive has to be "cleaned" (diskpart) but that would wipe the entire other non-OS partition and I need to keep that data. How can I install Win7 on this blank partition without losing data on the other partition?

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  • How to install Red Hat Enterprise Linux on Apple Macbook Pro MacBookPro4,1

    - by Todd V. Rovito
    I have a one year old Mac Book Pro that I am trying to get RHEL 5.4 installed on via bootcamp. No matter what I do I can't get the installer to boot. I have tried multiple DVD's and even verified the install works on a new Mac Book Pro. Most of the time the installer simply locks up. I usually use Linux text with all-generic-ide on the boot line. I removed the ide parameter and I just used linux text. The results I get are that a bunch of kernel messages appear then the background turns blue and a thin text box pops up saying its loading ata..... something it disappears too fast for me to read. Then the machine freezes. I pressed the alt function keys to see if I could look at the system log, here is what it says: Alt-f3 says "trying to mount CD device hda" Alt-f4 says status error: hda: lastFailedSense Hda: Failed opcode was: unknown Hda: Lost interrupt Hda: Drive not ready for command Ide-cd: command 0x3 timed out Above this junk it looks like it found the partition because it knew it was 20 GB and listed as /dev/sda3. I think it has something to do with the CD drive, is that possible? Thanks again for the support. PS I posted in the apple support forums ( Apple.com Support Discussions Boot Camp Installation and Storage) and didn't get an answer.

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  • Why do computers get slower over time? [closed]

    - by Paperflyer
    Possible Duplicate: Why does hardware get slower with time? You probably know this: A newly bought computer is snappy and responsive and just really fast. Then you use it for a couple of months and slowly but steadily the computer gets slower. Opening programs now takes a long time, accessing files takes longer, everything just takes longer than it used to. If you wipe your hard drive and reinstall, everything is back to its original snappyness, but will deteriorate again. This always happend with any operating system I used. Worst of all Windows XP, but also with Ubuntu Linux, Fedora Linux, OSX 10.5/10.6, Windows Vista... (haven't used Win 7 long enough to confirm this) Do you know the reason for this? Or even, a cure?

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  • Upgrading Windows 8 Consumer Preview to Release Preview

    - by user1407016
    I currently have my main hard drive split into two partitions. One being Windows 7 with about 600 GB of memory, the other Windows 8 Consumer Preview with about 50 GB. As you can guess it is set up for a dual boot. Today while looking up how to get the C# Facebook SDK for Metro apps I learned about the Release Preview being released. I was wondering: How do I go about getting rid of Windows 8 Consumer Preview and replacing it with the Release Preview? I know i can't just wipe it off my second partition because the dual boot uses Windows 8 to choose the operating system to boot.

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  • OS X 10.7.5 - telnet: connect to address 10.0.0.12: Operation not permitted

    - by user2169619
    I have troubles to connect from macos to reach windows shares and I hit some general problem with my macos. When I try to telnet to 445 port to my windows share server the macos throws "Operation not permitted". I have no firewall rule and I'm not able to google anything. sh-3.2# telnet 10.0.0.12 445 Trying 10.0.0.12... telnet: connect to address 10.0.0.12: Operation not permitted telnet: Unable to connect to remote host Any idea what can be the reason?

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  • File system concepts (df command)

    - by mkab
    I'm finding it difficult to understand some stuffs about the df command. Suppose I type df and I have the following output Filesystem 1k-blocks Used Avail Capacity Mounted on /dev/da0s1 some number some number number percentage /win /dev/da0s2 some number some number number percentage /win/home /dev/da0s3a some number some number number percentage / devfs some number some number number percentage /dev /dev/da0s3g some number some number number percentage /local /dev/da0s3h some number some number -number 102% /reste /dev/da0s3d some number some number number percentage /tmp /dev/da1s3f some number some number number percentage /usr /dev/da1s3e some number some number number percentage /var /dev/da1s1a some number some number number percentage /public Are the answers to the following questions correct? How many physical drives do I have? Ans: 2. da0s1 and da1s1 How many physical partitions on each disk? Ans: 8 for da0s1 and 1 for da1s1 How many BSD partition on each physical partition Ans: Impossible to determine. We have to use the -T to determine its type How is it possible for the file system /dev/da0s3h filled at 102%? And where is this overflowed data written?Ans: I have no idea for this one Thanks.

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  • Which equipments should I buy for a laboratory?

    - by Hossein Margani
    Hi every body! I want to create a network of computers for a network laboratory in a university. I want to install windows on them. What is the fastest way for doing this and also which equipments I should buy for this laboratory. I also want to use this network as a computer laboratory, operating system laboratory, programming laboratory, microprocessor laboratory, computer architecture laboratory and software engineering laboratory. I should emphasis that this is a scholastic laboratory. Thanks.

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  • How does operating system software maintains time clocks?

    - by Neeraj
    Hi everyone, This may sound a bit less relevant but I couldn't think of a better place to ask this question. Now consider this situation, you install an OS on your system, set the timezone and time, do some stuff and turn it off. (Note that there is no power going in to the computer). Now next time (say after some hours or days) you turn it on again, and you see the updated time. How is this possible even when my computer is not connected to the internet and was consuming no power during the period it was down.(Is there some kind of hardware hack?) please clarify!

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  • Old Laptop, New OS

    - by Raj More
    I have always been a Windows user. I have a laptop that originally had Windows XP on it and it is currently unused. I want to install a different OS on it. What OS can I try, and from where do I get one?

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  • How to install Ubuntu, Windows XP and Windows 7 from scratch as triple-boot system

    - by simon
    I'm currently running Windows XP, but have ordered Windows 7. I want to keep Windows XP on a separate partition, and install Ubuntu as well. In which order should I install the OSs, and is there anything differing from an ordinary single-system install I should keep in mind? For example, does the order of partition make any difference? If I want to have the system drive as "C:" drive in both Win XP and Win 7, what should I do?

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  • Will I be abled to access 2nd HDD from dual-boot

    - by Ruben
    I'm planning to have a dual-boot on my computer. I have 2 physical hard drives, one 500GB and one 2TB. What I want to do, is have a dual-boot setup (2 partitions, both 50 GB) for Windows 8 and Windows 7. But will I be able to access the 3rd partition on the disk, or the other disk from both OSs? In this case, it would be really useful to access files and install programs, because I could use them on both OSs, as long as I have the same registry keys.

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  • Notebook Operating System with extreme support cycles/security updates

    - by leto
    Hello there, after reading the announcements about Mac OS X "Lion" and Apples political decision, I've had enough. I'm a longtime Apple User since 1992, have always felt at home there, but am trying to switch to alternative Operating System since a year. I've also been working with Unix machines since 2001, so I'm looking in one of the free Unices or a Linux. Since I last looked at the desktop in 2002 choke much has changed, it seems. So I'm lost once more in the war between desktop environments and software. To be honest: I don't care what it's name is, I want to get my job done. Here's what I set me as landmark for an operating system/software to be considered: Has to be atleast four years old Has to supply security updates for current release for atleast a year Production quality stability for the whole desktop environment (!) No f****g commercial stuff that tends to supply me with privacy invading App Store or Cloud space So far I'm running a MacBook from 2007, 4 Gig memory, 250 Gig disk and I need: IMAPs for Mail since 1995 Webbrowser sic Shell Keeping current with Updates/Upgrades with no more than 5 Minutes spent in entering commands (makes it hard for OpenBSD ;-) ) A desktop filemanger would be nice, but is a bonus. What can you suggest as operating system? The one with the longest support cycles and best chance to survive the next 10 years will win a new user, even sending patches when needed :-) Greets

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  • Are memory leaks really something to worry about?

    - by chuck final
    I came across this post today, arguably debatable/wrong somewhat, but worth a shot looking over: http://andyharglesiscodebase.wordpress.com/2013/11/01/why-programmers-shouldnt-worry-about-memory-leaks/ The poster claims that modern OSes automatically have garbage collection implemented in the kernel memory, and that any unfreed user heap memory is managed during "post partum cleanup". It seems like rubbish, but I can't be 100% sure since I am not that knowledgeable on the kernel's memory management setup, etc.

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  • How does USB device recognition work?

    - by GorillaSandwich
    I'm curious how USB device recognition works in Windows. I imagine it's something like this: When you plug in a device, it tells Windows "here's my device ID to tell you what I am" Windows looks to see if any drivers have been installed that match that device ID. The driver probably tells Windows what the device should be called - like "BlackBerry Curve" or "Canon Printer" If so, it somehow associates that device with that driver Otherwise, it looks for a matching driver online (if you let it) Am I right? If so, that still leaves some questions. When you install drivers, where do they go? Are they files in a folder, or do they get added to the registry? What is Windows doing when it first recognizes the device, thinks, and finally says "your new device is installed and ready to use?" Where does Windows look for missing drivers? Is it in their own database? Do device manufacturers submit drivers to Microsoft for inclusion there? Can anybody explain how this process really works? Also, do other OSes do this differently?

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  • Is it Possible to Increase Display Resolution for OS X Maverick

    - by Michael
    The new OS X Maverick operating system has reduced maximum display resolution from 1920 x 1200 in Mountain Lion to 1680 x 1050, which is a SIZABLE reduction. The difference is obvious when viewing videos or photos. In addition, the colors are less vibrant. Does anyone know a way to change the display resolution for Maverick, thus restoring Mountain Lion resolution (1920 x 1200)...along with color vibrancy. By the way, I am using a 2012 Macbook Pro, with Matte display, which I think makes matters worse. At 1920 x 1200 my Macbook Pro was excellent...but at 1680 x 1050, it is very pedestrian.

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  • Snow Leopards Desktop Icons keeps Resizing Repeatedly

    - by Arashi
    I'm using a new macbook 10.6.5. I've been using mac OS for years. However, the problem that I'm getting is that the desktop icons keep resizing repeatedly. It keeps going to the biggest size possible and its driving me crazy. I've been resizing it back to medium size all the time. But when I start doing something at the finder it starts resizing by itself once again. Is there a fix to this problem? Please help.

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  • Computer does not boot after ram upgrade

    - by Calmarius
    I have a Dell Optiplex GX520 desktop (it's abount 5 yr old) PC with 512 MB DDR2 RAM. Since my computer always swapping I thought I should upgrade my RAM. I bought a Kingmax 2GB DDR2 RAM. But my system does not boot. The status leds are on 2 and 4. The user manual says 'video card failure' wtf? I put back the original module and everything works. I tried many combinations. When I leave the old 512 RAM in and put the 2GB next to it to the other socket my system completes the POST and I'm able to enter the BIOS menu. It says my system has 2.5 GB installed, one 0.5GB and one 2GB in dual asymmetric channel mode. It's seemingly right. Exiting the BIOS setup GRUB loads successfully, but when I try to boot Ubuntu it crashes with kernel panic immediately. Trying to load Windows XP does not get past the loading screen, it crashes with 0x8E stop error. Does this mean the ram I bought is faulty? Or is it just mean that the memory module I bought is too new to be handled my computer? I this case I may exchange the RAM with my friends. No other computer is in my house (my very old box has DDR1 ram, my systers new box has DDR3 ones. I can't plug my memory in neither one.) I'm going to return the RAM to store to replace it with a better one tomorrow. Is there any hope to get this new module work?

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