Is the memory empty after power off ubuntu
I am learning the fundamentals of CS and confused about the main memory.
I learned that BIOS reside on mainboard and linux was install in mass storage disk(such as HDD)
After I firstly installed ubuntu, and power off before clear up all the caches.
Now, on the status of power-off,
Is the main-memory is empty? Does any utilities accessories or anything should be installed to the memory?
ram
asked 3 hours ago
AliceAlice
419110
add a comment |
I am learning the fundamentals of CS and confused about the main memory.
I learned that BIOS reside on mainboard and linux was install in mass storage disk(such as HDD)
After I firstly installed ubuntu, and power off before clear up all the caches.
Now, on the status of power-off,
Is the main-memory is empty? Does any utilities accessories or anything should be installed to the memory?
ram
asked 3 hours ago
AliceAlice
419110
add a comment |
I am learning the fundamentals of CS and confused about the main memory.
I learned that BIOS reside on mainboard and linux was install in mass storage disk(such as HDD)
After I firstly installed ubuntu, and power off before clear up all the caches.
Now, on the status of power-off,
Is the main-memory is empty? Does any utilities accessories or anything should be installed to the memory?
ram
asked 3 hours ago
AliceAlice
419110
I am learning the fundamentals of CS and confused about the main memory.
I learned that BIOS reside on mainboard and linux was install in mass storage disk(such as HDD)
After I firstly installed ubuntu, and power off before clear up all the caches.
Now, on the status of power-off,
Is the main-memory is empty? Does any utilities accessories or anything should be installed to the memory?
ram
ram
asked 3 hours ago
AliceAlice
419110
asked 3 hours ago
AliceAlice
419110
asked 3 hours ago
AliceAlice
419110
asked 3 hours ago
AliceAlice
419110
asked 3 hours ago
AliceAlice
419110
419110
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
If you turn off your machine, power (or refresh cycles) that are needed to allow RAM to keep its contents are gone so it will soon lose it's contents and become meaningless (or random).
In theory RAM can survive up to ~15 seconds after power is cut (depends on a lot of factors, hardware & esp. temperature -- you can super-cool chips to prolong the loss up beyond 15 mins if you're lucky) - but you need physical access to the machine of course to take advantage of this.
Yes once power is cut, memory will lose contents, but it's not instantaneous, but we can usually ignore these extreme cold-hacks.
ROM is read-only memory, and doesn't need power to keep it's value.
BIOS is either stored in ROM, EPROM (erasable programming ROM used on really old hardware) or flash-memory (allowing you to change its contents with programs for update purposes) - none of these require power, so values don't get lost with power.
answered 3 hours ago
guivercguiverc
4,79621522
add a comment |
Yes, your ram is completely empty when you turn off the power.
Any object you want to survive a reboot shouldn't be kept in memory.
answered 3 hours ago
Sirajus SalekinSirajus Salekin
1,070620
add a comment |
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "89"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1122383%2fis-the-memory-empty-after-power-off-ubuntu%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
If you turn off your machine, power (or refresh cycles) that are needed to allow RAM to keep its contents are gone so it will soon lose it's contents and become meaningless (or random).
In theory RAM can survive up to ~15 seconds after power is cut (depends on a lot of factors, hardware & esp. temperature -- you can super-cool chips to prolong the loss up beyond 15 mins if you're lucky) - but you need physical access to the machine of course to take advantage of this.
Yes once power is cut, memory will lose contents, but it's not instantaneous, but we can usually ignore these extreme cold-hacks.
ROM is read-only memory, and doesn't need power to keep it's value.
BIOS is either stored in ROM, EPROM (erasable programming ROM used on really old hardware) or flash-memory (allowing you to change its contents with programs for update purposes) - none of these require power, so values don't get lost with power.
answered 3 hours ago
guivercguiverc
4,79621522
add a comment |
If you turn off your machine, power (or refresh cycles) that are needed to allow RAM to keep its contents are gone so it will soon lose it's contents and become meaningless (or random).
In theory RAM can survive up to ~15 seconds after power is cut (depends on a lot of factors, hardware & esp. temperature -- you can super-cool chips to prolong the loss up beyond 15 mins if you're lucky) - but you need physical access to the machine of course to take advantage of this.
Yes once power is cut, memory will lose contents, but it's not instantaneous, but we can usually ignore these extreme cold-hacks.
ROM is read-only memory, and doesn't need power to keep it's value.
BIOS is either stored in ROM, EPROM (erasable programming ROM used on really old hardware) or flash-memory (allowing you to change its contents with programs for update purposes) - none of these require power, so values don't get lost with power.
answered 3 hours ago
guivercguiverc
4,79621522
add a comment |
If you turn off your machine, power (or refresh cycles) that are needed to allow RAM to keep its contents are gone so it will soon lose it's contents and become meaningless (or random).
In theory RAM can survive up to ~15 seconds after power is cut (depends on a lot of factors, hardware & esp. temperature -- you can super-cool chips to prolong the loss up beyond 15 mins if you're lucky) - but you need physical access to the machine of course to take advantage of this.
Yes once power is cut, memory will lose contents, but it's not instantaneous, but we can usually ignore these extreme cold-hacks.
ROM is read-only memory, and doesn't need power to keep it's value.
BIOS is either stored in ROM, EPROM (erasable programming ROM used on really old hardware) or flash-memory (allowing you to change its contents with programs for update purposes) - none of these require power, so values don't get lost with power.
answered 3 hours ago
guivercguiverc
4,79621522
If you turn off your machine, power (or refresh cycles) that are needed to allow RAM to keep its contents are gone so it will soon lose it's contents and become meaningless (or random).
In theory RAM can survive up to ~15 seconds after power is cut (depends on a lot of factors, hardware & esp. temperature -- you can super-cool chips to prolong the loss up beyond 15 mins if you're lucky) - but you need physical access to the machine of course to take advantage of this.
Yes once power is cut, memory will lose contents, but it's not instantaneous, but we can usually ignore these extreme cold-hacks.
ROM is read-only memory, and doesn't need power to keep it's value.
BIOS is either stored in ROM, EPROM (erasable programming ROM used on really old hardware) or flash-memory (allowing you to change its contents with programs for update purposes) - none of these require power, so values don't get lost with power.
answered 3 hours ago
guivercguiverc
4,79621522
answered 3 hours ago
guivercguiverc
4,79621522
answered 3 hours ago
guivercguiverc
4,79621522
answered 3 hours ago
guivercguiverc
4,79621522
4,79621522
add a comment |
add a comment |
Yes, your ram is completely empty when you turn off the power.
Any object you want to survive a reboot shouldn't be kept in memory.
answered 3 hours ago
Sirajus SalekinSirajus Salekin
1,070620
add a comment |
Yes, your ram is completely empty when you turn off the power.
Any object you want to survive a reboot shouldn't be kept in memory.
answered 3 hours ago
Sirajus SalekinSirajus Salekin
1,070620
add a comment |
Yes, your ram is completely empty when you turn off the power.
Any object you want to survive a reboot shouldn't be kept in memory.
answered 3 hours ago
Sirajus SalekinSirajus Salekin
1,070620
Yes, your ram is completely empty when you turn off the power.
Any object you want to survive a reboot shouldn't be kept in memory.
answered 3 hours ago
Sirajus SalekinSirajus Salekin
1,070620
answered 3 hours ago
Sirajus SalekinSirajus Salekin
1,070620
answered 3 hours ago
Sirajus SalekinSirajus Salekin
1,070620
answered 3 hours ago
Sirajus SalekinSirajus Salekin
1,070620
1,070620
add a comment |
add a comment |
Thanks for contributing an answer to Ask Ubuntu!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1122383%2fis-the-memory-empty-after-power-off-ubuntu%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
