10000 RPM hard drive data recovery software free download
- Publish Time：2018-09-18 09:00
Is it necessary to buy a 10,000-speed hard drive?
It is an outdated enterprise-level product, which is noisy and hot, and its speed is far from being comparable with SSD. It has already been eliminated. It is necessary to know that the reading and writing speed of 15,000 rpm is only 180~200MB/s, and the 10,000 rpm is only about 160MB/s. It is directly used by SSD, and the price is more expensive than SSD. Only enterprise users will choose because of life. Longer than SSD, but due to noise and cost, it will be eliminated sooner or later.
Is the hard disk 7200 going to 10,000 rpm? What is the maximum read/write speed and M/S? Why 10,000 rpm is better than the 7200 selection
Is the hard disk 7200 going to 10,000 rpm? What is the maximum read/write speed and M/S? Why is 10,000 rpm much more expensive than 7200 rpm? What brand of hard disk is currently good?
Of course, 10,000 rpm is much faster than 7200 rpm, and the speed of 10,000 rpm is nearly double that of 7200 rpm.
A hard disk is one of the main storage media of a computer and consists of one or more discs made of aluminum or glass. The disc is covered with a ferromagnetic material. The hard disk has a solid state drive (SSD disk, new hard disk), a mechanical hard disk (HDD traditional hard disk), and a hybrid hard disk (HHD is a new hard disk based on a traditional mechanical hard disk). The SSD uses flash granules for storage, the HDD uses magnetic discs for storage, and the hybrid hard disk (HHD: Hybrid Hard Disk) is a hard disk that integrates a magnetic hard disk and flash memory. Most hard drives are fixed hard drives that are permanently sealed to the hard drive.
The most precise part, the magnetic head is more demanding due to the nature of the magnetic head. The magnetic head is suspended on a high-speed rotating disc. The floating force comes from the airflow driven by the rotation of the disc. The magnetic head must be suspended rather than contact the disc surface to avoid the wear of the disc surface and the magnetic head.
Head reset energy saving technology: save energy by resetting the head during idle time.
Multi-head technology: Speed up the hard disk by adding multiple heads simultaneously reading or writing on the same disc, or simultaneously using the head to read or write the multi-disc to speed up the disk, mostly used for servers and database centers.
10,000 rpm is a lot faster than the 7200 rpm. The 10,000 rpm read and write speed is nearly 2 times that of 7200 rpm. Now the Western Digital hard drive is very good! Buy 1000G, double disc, very powerful!
This gap is not very big, but it is not without, because 10,000 rpm is very powerful, so the price will be very expensive, I have done the hard disk, the number of revolutions and the number of disks is the key to the hard disk.
1w turn civilian use is not popular, basically used in enterprise-class servers and minicomputers, up to 1.5w turn, using scsi and sas interface, ordinary motherboard does not have such a bus controller, can not be used.
10000 RPM hard drive data recovery method
The basic unit of data stored on a hard disk is a sector, which we can understand as a page of a book. When we install or buy a mobile hard drive, the first step is to facilitate management - partitioning. Regardless of the partitioning tool, the first sector of the hard disk is labeled with the number of partitions of the hard disk, the size of each partition, the starting position, etc. The term is called the master boot record (MBR), and some people refer to the partition information. table. When the master boot record is destroyed for various reasons (hard disk bad sectors, viruses, misoperations, etc.), some or all of the partitions will naturally be lost. According to the data information characteristics, we can recalculate the calculation partition size and position, manually labeling Go to the partition information table and the "lost" partition is back.
File allocation table
In order to manage the file storage, after the hard disk partition is completed, the next work is to format the partition. The formatter divides the partition into a directory file allocation area and a data area according to the partition size. Just like we can see the novel, the first few pages are chapter directories, and the latter is the real content. The file allocation table records the attributes, size, and location of each file in the data area. Our operation of all files is based on the file allocation table. After the file allocation table is destroyed, the system cannot locate the file. Although the real content of each file is still stored in the data area, the system still considers that the file no longer exists. Our data is lost, just like the catalog of a novel is torn off. It is impossible to go directly to the desired chapter. To get the content you want (recover data), you can only know the approximate number of pages of the specific content by memory, or find the content you want on each page (sector). Our data can also be recovered back.
When we store the file in the hard disk, the system first writes the file name and size in the file allocation table, and continues to write the file content at the beginning of the data area on the file allocation table according to the free space of the data area. Then start writing the actual content of the file to the data area, and a file storage operation is completed.
The delete operation is very simple. When we need to delete a file, the system simply writes a delete flag in front of the file in the file allocation table, indicating that the file has been deleted, and the space occupied by it has been "released". Other files can be deleted. Use the space he occupies. So, when we delete the file and want to retrieve it (data recovery), just remove the delete flag with the tool and the data is restored. Of course, the premise is that no new file is written, and the space occupied by the file is not covered by the new content.
The formatting operation is similar to the deletion, only the file allocation table is operated, but the formatting is to delete all the files, or simply empty the file allocation table, the system will think that there is no content on the hard disk partition. The formatting operation does not do anything to the data area. The directory is empty and the content is still there. With the data recovery knowledge and corresponding tools, the data can still be recovered.
Note: Formatting is not 100% recoverable. In some cases, the disk cannot be opened and needs to be formatted to open. If the data is important, don't try to format it and then restore it, because formatting itself is the process of writing to the disk, only destroying the residual information.
Data recovery engineers often say: "As long as the data is not overwritten, the data may be restored."
Because of the storage characteristics of the disk, when we don't need the data on the hard disk, the data is not taken away. When deleting, the system just writes a delete flag on the file. Formatting and low-level formatting are also overwriting the data on the disk and writing the data with the number 0. This is the overlay.
After a file is marked with a delete flag, the space occupied by the file will be overwritten with new files when new files are written. At this time, the deleted file name is still there, but the space content pointed to the data area has been overwritten and changed, and the recovered abnormal content will be recovered. The space occupied by the file information with the delete mark in the same file allocation table may also be covered by the new file name file information, and the file name will not exist.
When a partition is formatted, there is new content copied, the new data just covers the part of the space before the partition, and the space occupied by the new content is removed. The unordered content on the remaining spatial data area of the partition may still be reorganized, and the data is Come back.
Similarly, data loss caused by cloning, one-click recovery, system restore, etc., as long as the new data footprint is less than the space before the destruction, the data recovery engineer may recover the partition and data you want.
Prevent data loss
3 ways to prevent data loss:
1. Never save your file data on the same drive of the operating system
We know that most word processors will save the files you create in "My Documents", but this is the least suitable place to save files. For most computer problems affecting the operating system (whether due to a virus problem or a software failure), the only solution is usually to reformat the drive or reinstall the operating system. If so, everything on the drive will be data lost.
Another relatively low-cost solution is to install a second hard drive on your computer. When the operating system is destroyed, the second hard drive will not be affected. If you still need to buy a new computer, this The hard drive can also be installed on a new computer, and the hard drive is easy to install.
If you are not very convinced of the way to install the second drive, another good option is to buy an external hard drive. The external hard drive is easier to operate and can be used on any computer at any time, just plug it in. USB port or firewire port.
2. Back up your file data regularly, no matter where they are stored
It is not enough to save all your files in the operating system. You should save the files in different locations, and you need to create regular backups of the files so that we can guarantee the security of the files, no matter whether your backup will fail: CD It may be damaged, the hard disk may be damaged, the floppy disk is removed, and so on. If you want to make sure you can take out your files at any time, consider doing a second backup. If the data is very important, you might even consider saving important files in the fire layer.
3. Beware of user errors
Although we don't want to admit it, we often lose data because of our own problems. Consider using safeguards in word processors, such as version feature features and tracking changes. The most common case of user data loss is that when they accidentally delete certain parts while editing the file, the deleted part is lost after the file is saved, unless you enable the function of saving file changes.
If you feel that those features are cumbersome, then I suggest you save the file as a file with a different name before you start editing the file. This method is not organized like other methods, but this is really a good way to solve the data loss. problem.