Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I was just wondering something, I know when you go into sleep mode with vista, it writes everything to disk and powers down, and when you power up it returns it all to the RAM, but what I was wondering, does the wrote files stay on disk, or is that partition of space cleaned and empty after the power up.

share|improve this question

closed as not constructive by user88311, Ƭᴇcʜιᴇ007, tombull89, Dave M, Renan Apr 9 '13 at 15:42

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.

up vote 1 down vote accepted

Hibernate mode uses the hiberfil.sys file to store the current RAM files of the PC. It’s managed by Windows so you can’t delete the file. I think it stays on your drive, and default usage is 75% of your RAM memory size,.

share|improve this answer

When you enable hibernation on Windows, it creates a hidden file called hiberfil.sys in the root of the boot drive. The file is slightly larger than the amount of RAM in your system, as it needs to be large enough to hold the contents of the systems RAM. As long as hibernate is enabled on the system, that file will exist. If you went to hibernate and you didnt have enough disk space, you could have the potential of losing all your data.

share|improve this answer
I understand that, maybe I should clarify the question, if you sleep, and wake, is everything from when you last slept, still stored in the hiberfil.sys – user88311 Jan 24 '13 at 0:44
ah, you are asking about the security of the hiberfyl.sys. You should change your question to reflect that. – Keltari Jan 24 '13 at 1:14
I do believe much, if not all of the data will remain in hiberfil.sys. It, as well as the pagefile, can contain sensitive information. It is not something the casual computer user will be able to datamine, but there is some risk involved. – Keltari Jan 24 '13 at 1:33

Not the answer you're looking for? Browse other questions tagged or ask your own question.