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Energy Use : 1-6 watts in Standby and 0 watts in Hibernate
Time to sleep/wake up : a few seconds in Standby, and30 secs to3 minutes in Hibernate
Standby puts your computer into energy-saving mode, where it uses very little power.
Hibernate saves your workspace (all your open windows), then turns the computer off.
The difference is that hibernate saves more energy because the computer goes off completely, but it takes longer for the computer to wake up from hibernation, so it's not as convenient.
Sleep is more complicated, because it means different things on different computers.
You probably want Standby, because it's the most convenient. With Standby it takes only a few seconds for your computer to wake up. With Hibernate or Shut Down, you have to wait30 seconds to3 minutes for it to start up again. Hibernate or Shut Down will save more energy, but not much. Six watts x23 hours a day x30 days a month is4.1 kWh, which at15¢/kWh would cost you62¢/mo. If that kind of savings is important to you, then sure, hibernate or shut down your computer. Otherwise, just set your computer to standby so that it wakes up quickly the next time you want to use it, and don't worry about the very small difference in energy use
Dear Fatma,
== When you click Turn Off Computer, Windows XP shows4 options to shut down your computer: Stand By – Turn Off – Restart –Hibernate Most people understand Turn Off and Restart as they’re frequently used. Where people get confused is between Stand By and Hibernate. The main differences lie in power consumption and data storage.
== Stand By and Hibernate are techniques used for putting your computer to sleep—and saving power. So, when you wake them up, the recovery is fast—that is, relative to a startup from a complete shutdown. But one is much faster and safer. And that’s because they work differently.
== Standby is known as 'sleep' mode. In 'Stand by' mode, Windows OS turns off non-essential hardware resources such as hard disk, removable disks, monitor. The system ten is able to reactivate very quickly when you press any key or move the mouse. FYI - You cannot power-off the system in 'Stand by' mode.
== Sleep is a power-saving state that allows a computer to quickly resume full-power operation (typically within several seconds) when you want to start working again. Putting your computer into the sleep state is like pausing a DVD player—the computer immediately stops what it’s doing and is ready to start again when you want to resume working.
== Hibernate happens automatically in Windows Vista for both laptops and desktops after the computer has been sleeping for a while. Laptop users can skip to the chase and just choose Hibernate manually. That option isn't available to desktop users by default. It's also helpful if the Hibernate option has disappeared from your laptop for some reason.
== Not all PCs have the capability and are configured to Hibernate, and Hibernate doesn’t show by default. If yours is, to see the Hibernate option on your XP shutdown screen, and when you turn off your computer you will see a dialog box presenting three options: Standby, Turn Off and Restart. If you hold down your Shift key, you’ll see the Stand By option changes to Hibernate.If you still can’t see the option, you should check your Power Options Properties in your Control Panel.
== Apple calls Hibernation on Mac OS as "Safe Sleep".Safe Sleep happens on laptops only if it's sleeping and the battery level drops too low. You can override that behavior and get your Mac (laptop or desktop) to Safe Sleep immediately on demand with software like Deep Sleep, SmartSleep, or SuspendNow .
== What is the difference between putting your PC in Hibernate or Standby mode?
In order to understand both modes, we have to declare the differences between them in several aspects:
1- Standby puts your computer into energy-saving mode, where it uses very little power. While Hibernate saves your workspace (all your open windows), then turns the computer off. On my laptop I can go about3 days on battery power in Sleep, and about2 weeks in Hibernate mode.
- The difference is that hibernate saves more energy because the computer goes off completely, but it takes longer for the computer to wake up from hibernation, so Hibernate is not as convenient.
- Standby is the most convenient. With Standby it takes only a few seconds for your computer to wake up. With Hibernate or Shut Down, you have to wait30 seconds to3 minutes for it to start up again.
- Hibernate or Shut Down will save more energy, but not much. Six watts x23 hours a day x30 days a month is4.1 kWh, which at15¢/kWh would cost you62¢/mo. If that kind of savings is important to you, then sure, Hibernate or shut down your computer. Otherwise, just set your computer to standby so that it wakes up quickly the next time you want to use it, and don't worry about the very small difference in energy use.
- Hibernate is great. You see, sleep mode (as standby) puts your system into an off-like state, allowing you to pick up where you left off after just a few seconds (unlike rebooting, which can take minutes). But a PC in standby mode continues to consume battery power, so it's not uncommon to return to a "sleeping" PC to find that it's just plain dead.
- Hibernate; on the other hand, writes your machine's current state to a temporary hard-drive file, then shuts down completely (much like "off"). When you start it up again, it loads that file and returns you to where you left off--no booting required.
- Both ends of the Hibernate process take a little longer than standby (usually10-20 seconds, in my experience), but you avoid any of the issues that can arise when Windows suddenly loses power. What's more, standby is a notoriously flaky mode. I've encountered plenty of systems that refuse to wake up properly, so you end up losing whatever work you were trying to preserve.
- Stand by will still use some power in the sleep state to maintain those programs and files, and therein lies a danger: If the battery should drain to empty during that period, any unsaved data will be lost. Hibernate is recommended in an extended period of sleep.
- Consequently, unless you're running your laptop on AC power, I recommend using Hibernate most of the time. And here's a handy related tip: You can change the function of your laptop's power button,so that pressing it automatically activates hibernation.
- Still, Standby mode is also friendlier for quick email checks or5-min web browsing at a WiFi hotspot. The laptop can come out of standby in10s or less, while un-hibernating takes about as long as a full boot up. Besides, Hibernate will fail when and if you change your hyper-threading settings in bios prior to waking your PC.
2- Sleep is more complicated, because it means different things on different computers.
- Mac OS, desktop. Sleep is the same as Standby. There is no built-in way to Hibernate.
- Mac OS, laptop. Sleep initially means Standby, but if the battery level drops very low then the laptop automatically hibernates.
- Windows Vista. Sleep initially means Standby, but it switches to Hibernate if the battery level drops too low (laptop) or the computer has been sleeping for more than three hours (both desktops & laptops). You can change the3-hour period to something else in Settings > Power Options.
- Windows XP. ???
3- Most Windows XP systems allow you to set various power options. This is ideal for notebook users who wish to conserve power after a certain period of inactivity. It’s also useful for desktop owners who wish to conserve power. As example, you might want to create a profile that first puts your computer into Stand By mode and then goes into Hibernate after another time.
To create a Power Profile in Windows XP:
a. From the Start menu, select Control Panel
b. Select Performance and Maintenance
c. Select Power Options. Your system should display the Power Options Properties dialog with various tabs. The number of tabs will vary based on your manufacturer and if you have a UPS. Notebook systems have extra settings so you can set a scheme for when you’re using direct power or batteries.
d. Click the Hibernate tab. Check the box if you wish to enable this feature.
e. Click the Power Schemes tab.
f. Set your options to suit your needs. If you’re on a notebook, make sure that your Hibernate time is less than your battery time. Otherwise, your battery will drain before the option can kick in.
g. Click OK.
Note: It is may be cheap and abundant energy, but there is little need to keeping your computer fully powered. Microsoft and various hardware vendors have improved the power management systems. The bigger question is whether you should use Stand By, Hibernate or both.
4- In general, I suggest using Stand by when, for example, you take a short break during a meeting, or when you want to leave the internet café for such an important appointment and put your plans to return later on.
- Then, when the meeting resumes or comes back from your appointment, a click of a key will nearly instantly reopen the programs and files to their pre-sleep state.
- Your machine recovers quickly as your data is stored in RAM. The slower part is waking up the peripherals. Although your machine is in "standby" the power has been cut to items such as your hard drive and monitor. You're running your machine in a very low power mode, but it is still on. This mode can be useful if you're on a notebook and need to conserve your battery while you step away.
- If you have a notebook, you wouldn’t want to keep your computer in this state for more than several hours. The first issue is that even though you’re in a low power consumption state, you’re still using power. The bigger reason is once your power goes, so does your data.
- The big drawback to Stand By is you run the risk of losing whatever data you were working on if the power goes out. As a precaution, you might want to save the data before putting your computer in this mode or use Hibernate. At Hibernate, your data is saved to your hard disk and not RAM. This makes it a safer, but slower option for shut down and resume.
- Actually Hibernating doesn't necessarily take up as much disk space as RAM in your machine. Instead XP and later only save the contents of RAM that is in use, which could be significantly less than what you've got installed. XP and later also do some fast compression on the Hibernate file when saving it. That way there's less to read back in upon resumption (and so it's faster.)
5- An important difference between Sleep & Hibernate is how they handle attached devices. Sleep leaves them 'open' or 'connected' while Hibernate writes out active files and closes all connections.
- This difference can be important if you're using external drives and with Hibernation you can detach external drives and the like from the computer when it is in that state. This is different from Sleep where there's a good chance files aren't entirely saved, drive indexes aren't updated, etc.
- Thus, resuming from Sleep you might get error messages, particularly if your external devices take a moment to 'wake up' themselves and aren't immediately ready.
- Windows will want to finish whatever it was doing before it went to Sleep, won't be able to, and will throw up an error message (and you'll possibly have a damaged file and/or crashed application.)
Finally, it is better to know that:
- In Windows7 and Windows Vista there is the concept of "hybrid sleep"; this Sleep mode, which is a hybrid of Stand by and Hibernate—adapting the best features of both, not only putting the computer to sleep but also copying the contents of the memory to disk (a la hibernation).
- If you engage Sleep, first the computer will go into a Standby mode, and then, if the battery becomes dangerously low, it will automatically engage Hibernate and take that critical snapshot before closing.
- The advantage of this is that you get all the fast booting goodness of sleep but if power is lost then the computer can fall back to resuming from the hibernation file - rather than making you fully restart Windows again and lose your open windows, files orthere's normal standby (ram is powered), hibernate (sleep) where the contents of ram are stored on the hard disk and hybrid where the ram-content is kept and additionally written to disk (to prevent data loss on power outage
- In addition, Vista lets the user select a default time period before the Standby mode automatically switches to Hibernate. It’s a nice addition.
- If you want to make any number of power-saving adjustments to your computer, follow these steps:
- i)- For Windows XP, click on Start, Control Panel, Power Options. And if you press the Power Schemes tab, you have even more options.
ii)- In Vista, click on Start, Control Panel, Power Options (see screenshot below), and you’ll see an even wider assortment of options.
Best Regards,
Lubna al-Sharif
الـ Hibernate، انه كمبيوترك لمن يفعل الـ Hibernate يخزن كل المعلومات والنوافذ اللي على الشاشة في مكان في الهاردديسك، ثم يطفي، بمجرد تشغيلك للجهاز مرة أخرى.يرجع لك الـ Windows لشكله الطبيعي قبل لا تطفيه، ببرامجه وبملفاته وبالنوافذ اللي على الشاشة .لكن الـ Stand By .. يطفي جهازك بشكل جزئي، وهو يشتغل كأنه Shutdown حقيقي .. وثنينهم تشغلهم بثواني بحركة فارة او بضغطة الباور !
والله ماعندي الخبره الكافيهلكن اتوقع انه stand by يكون الجهاز معلق .. لكن تشغيله يكون اسرع من يوم يكون مقفل بالكاملو hibernate يكون الجهاز يشتغل لكن على طاقه كهربائيه ضعيفه جدا .. بحيث انه تقدر تكمل عملك اول ماترجعله بشكل اسرع
In the first I would like to explain something missing here "Standby/Sleep" they're just two different names for the same thing.
Sleep is commonly known as Standby in Windows systems or S3 in ACPI. In Sleep mode, the power supply to non-essential and non-critical components is withheld, and most system operations are shutdown and stopped. All data in physical memory (RAM) is still kept in internal memory, and the whole system is placed in a standby mode, which can be woken up and used almost immediately.
In Sleep mode, the power load reduces considerably, saving energy. However, the power to the machine must not be cut off completely. If power is lost, the system state will also be lost and the computer will behave as though just booted from a powered-off state.
Hibernate, or S4 in ACPI, meanwhile will save the data in physical memory to the hard disk drive first, and then power off the computer.
In Hibernate mode, a file named hiberfil.sys, which has the same file size as the amount of system memory, will be created on the local disk. When the user restarts the machine, it will boot up and load back the system state at the point of the last hibernation.
The advantage of Hibernation mode is that no power is wasted. In Hibernation, no electricity is consumed by the system so a computer can be kept in this state indefinitely.
Also, restoring from Hibernate is generally faster than a computer reboot. It is also different from a reboot in the sense that users can return to the exact state of the last hibernation with all running programs and open documents intact, instead of booting to an empty desktop.
The disadvantage of Hibernation is that after a period of time, there may be fragmentation of the hibernation file. Users may need to defragment the volume that stores the hibernation file frequently.
Dear Fatma Abed
Firstly First thank you for inviting me to answer your question.
then ,the Answer For your question is :
Sleep : is a power-saving state that allows a computer to quickly resume full-power operation (typically within several seconds) when you want to start working again. Putting your computer into the sleep state is like pausing a DVD player—the computer immediately stops what it’s doing and is ready to start again when you want to resume working.
Hibernation : is a power-saving state designed primarily for laptops. While sleep puts your work and settings in memory and draws a small amount of power, hibernation puts your open documents and programs on your hard disk, and then turns off your computer. Of all the power-saving states in Windows, hibernation uses the least amount of power. On a laptop, use hibernation when you know that you won't use your laptop for an extended period and won't have an opportunity to charge the battery during that time.
For Further Information ( Microsoft MSDN Article)
Notes : the Sleep Mode May Cause a startup Failure you can Solve this problem by restarting your computer And delete the image created by windows temporarily .
Hope this help you ..best regards .
STANDBYايقاف محرك الأقراص الصلبة والمراوح والشاشات,فهذه أدوات إستهلاك كهربائية عاليةالحاسوب ما زال يستعمل القوّة لحفظ البيانات في الذاكرة، لذا أنت يمكن أن تستأنف التشغيل بسرعة أكبر.Hibernateفي نمط Hibernate، يحفظ XP البيانات في الذاكرة بالقرص الصلب. و لا ضير أن القوّة تنقطع بالكامل، لذا هذا يبقي حياة للبطارية أطول, خصوصا لأجهزة اللاب توب. عندما تستأنف Resume، فإنه يأخذ مدة أطول قليلا لأن البيانات حفظت على القرص ويجب أن تعاد إلى الذاكرة. بالطبع، تستعمل هذه الطريقة سعة قرص لخزن بيانات الذاكرة.للمزيدhttp://whatis.techtarget.com/definit...841386,00.htmlhttp://en.wikipedia.org/wiki/Standby
اولا نبداء بـ : stand byمصطلح يطلق عادتا في عالم لويندوز على وضع الوقوف المؤقت عند استعمال برنامج ما (مثلا عند مشاهدة فلمWindows Media Player ) للمواصلة بعد ذالك دون اقفالهاما عن hibernate و sleepفهما وضعان لحفظ الطاقة في لويندوز اثناء عدم استخدامك للجهاز1. Sleep:في هذا الوضع يقوم الجهاز بحفاظ على عملك و معلوماتك في Ram لذا يحتاج لإبقاء الطاقة موصولة بها اما الجزاء الأخرى فيقطع عنها التيار البروسيسر ، القرص الصلب ... الخ و حال عودتك للعمل على الجهاز يقوم باسترجاعها منها .2. Hibernate:في هذا الوضع بحفظ معلوماتك و ما كنت تقوم به في القرص الصلب ثم يقطع التيار على اغلب اجزاء الجهاز ما عدا BIOS. و بذا يفر اكبر قدر ممكن لطاقة حتا ان معلوماتك لا تضيع اذا قطع عن جهاز التيار لإمكانية استرجاعها في اي وقت فالقرص الصلب كما هو معروف لا يحتاج تيار كهربائي لحفض المعلوماتبعد أن عرفنا الإثنين الفرق واضح بينهما الوضع Sleep يطفئ بعض اجزاء الجهاز لتوفير الطاقة لكن حال انقطاع التيار ستفقد كل المعلومات الغير محفوظةبينما الوضع Hibernate يفر طاقة اكثر بإغلاق اغلب اجزاء الجهاز و لا تضيع معلوماتك فيه حتى ولو انقطع التيار عن جهازك تماما و هو مناسب لفترات الغياب الطويلة عن جهاز فمن يدري ما قد يحصلو انت ما عليك إلا أن تختار ما يناسب حسب الموقف الذي انت فيهيمكن أن تجد معلومات اكثر في موقع مايكروسوفت للدعم:Sleep and hibernation: frequently asked questions
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