For the people who don't often use RAR file, they may don't know what is rar password and how to set rar password . But before we learn how to set rar password, we should know what is RAR file. RAR is a proprietary file format for data compression and archiving package, developed by Eugene Roshal, so its full name is Roshal ARchive.

Eugene Roshal was originally written for DOS version of the encoding and decoding process, and later ported to many platforms, such as the famous Windows platforms WinRAR. Eugene Roshal conditional open the source code of the decoding process, but the encoding process remains private.

RAR file extension is. Rar, MIME type application / x-rar-compressed.

RAR and ZIP are both lossless data compression, but compared to ZIP, RAR files have the higher compression ratio, but in a slower speed than ZIP. Since RAR file header will occupy a certain space, there is little room in data compression, the compressed file may be larger than the original file. One of the main advantages of RAR is it can compress the target file into multiple files, and easily separated from this extract the source files compressed files.

In addition, RAR format also supports tightening, all files are compressed to the same data area to increase the compression ratio, the cost of extracting a single file to extract it in front of all files. The new RAR encryption algorithm is using AES, and the old RAR encryption algorithm is private. Both algorithms are hard to break, so if you lost the password you can only use some recovery tools to do it and I recommend best rar password recovery for you. RAR can also add redundancy repair information, repair information in the file is damaged but can be good enough to repair the compressed package.

Usually you can use WinRAR to open RAR treatment and this is the most popular way.

Generally RAR's compression ratio is higher than ZIP, but the compression / decompression speed is slower.

Sub-volume compression: compressed into multiple files.

Solid compression: the same as to compress a file to increase the compression ratio, the cost of access to any documents required to extract the package in the archive.

Recovery record: adding redundant data is used to repair damage in the archive itself, but the recovery record may be enough for a long time to recover the damaged archive.

Encryption: RAR 2.0 using AES, the encryption algorithm before the RAR private. Have not yet been directly compromised (at least not publicly), do not know the password can only brute force.

Note: The best rar password recovery is not only a rar password recovery but also can recover hard drive password for you once you lost your important data. In addition, Hard Drive Recovery can help you: 360°PC health check; Optimize & speed up PC; Clone partition/disk; Manage disk easily; Recover lost data; Find passwords & MS product keys; Backup & restore files/system; Protect privacy & data security etc.

In the format the partition, we often found that a quick format is always faster than the normal format. Why? What is the difference between quick format and normal format? Do they both harm the hard disk? If you are not a computer expert, you are curious about these questions. So today, I will introduce the difference between a quick format and general format.

If you install Windows 7 operating system in a new hard drive, and the first format is recommended to select the system's own standard formatting because the format of the hard drive of the Windows 7 system requirements is more strict and the first time using the system's standard formatting for hard disk should be useful. If you want to recover the formatted files from hard drive in Windows 7, you have to use Windows 7 password recovery software.

About the difference between the quick format and general format, you should know that a quick format is not the true meaning of the formatting, it just quickly delete all the partition. If no virus exists in your computer, you can try this way to save your time. However, if your computer has  virus, this solution does not work at all. So if you want to delete the files in your hard drive on your computer completely, you should take use of the normal format.

Quick format this disk as a "formatted" tags. Although theoretically all the information of the disk can be recovered with the best hard drive recovery software , Wondershare WinSuite 2012 for example, but only through these special software recovery. Intraday Trojans have all been cleared (100%), unless you intend to use special software to restore it. Common formatting will not be able to use special software recovery data, the only difference.

However, if your system tray, there are a trojan or virus, and they run, even if you format the other disk, the virus may also write your own re-formatted disk.

Quick format the partition on the data erase operation, time-consuming in a few seconds to tens of seconds ranging from.

Slow formatted the partition on the data erase operation, and then fill in any data to fill the partition, and then erase the data, to erase the original data destructive function. And in the format operation after the erase, while the hard disk for bad sectors check side of the partition. Consuming a few hours to ten hours ranging.

The usual optimization of computer systems maintenance only need fast formatting can be, if your hard disk data is confidential, and that is formatted with a slow.

By the way, if you want to recover deleted files from hard drive , you should try this Hard Drive Recovery software. It is a multi-purpose and versatile solution that will provide data recovery solutions from almost all types of data loss.