SATA II hard drive Data recovery software free download
- Publish Time：2018-09-17 09:20
SATA hard drive data recovery problem
I have a SATA hard drive here, the BIOS can detect it, but it reads noise, can't enter the system, DOS can't read it, WINPE is also, other machines and hard disk boxes can't read the data inside. The problem is, what is there now? The method can open or export the data in the hard disk, because the data is very important?
Drop another hard drive and use this bad boot to see if the system has any hints. One possibility is that the hard disk partition information file is lost and damaged, because there is noise, and the worst may be physical damage, then it is not saved. Data recovery is a professional job that requires professional repair, but it takes a lot of money to look at the value. Asking this question here is not going to solve your problem.
SATA II is based on SATA based on chip giant Intel Intel and hard disk giant Seagate Seagate. Its main feature is that the external transmission rate has been further increased from SATA 150MB/s to 300MB/s.
Foreign Name SATA2 Developer Intel Intel External Transmission Rate 300MB/s Key Technology 3Gbps External Transmission Rate and NCQ Technology
1 chip brief
It also includes a series of technical features such as NCQ (Native Command Queuing), Port Multiplier, and Staggered Spin-up. A simple external transmission rate of 3 Gbps is not a true SATA II.
2 key technologies
The key technology of SATA II is 3Gbps external transmission rate and NCQ technology. NCQ technology can optimize the instruction execution order of the hard disk, avoiding mechanically moving the head to read and write different positions of the hard disk in the order of receiving instructions, like the traditional hard disk. In contrast, it sorts and sorts the commands after receiving the commands. The latter heads are addressed in a highly efficient sequence to avoid losses caused by repeated head movements and extend hard drive life. In addition, not all SATA hard drives can use NCQ technology. In addition to the hard drive itself to support NCQ, the SATA controller of the motherboard chipset is also required to support NCQ. In addition, NCQ technology does not support the FAT file system and only supports the NTFS file system.
Due to the chaotic market of SATA devices, many SATA device providers have abused the "SATA II" in the market promotion. For example, some hard drives known as "SATA II" only support 3Gbps and do not support NCQ, while some only have The 1.5Gbps hard drive supports NCQ. Therefore, Seagate-led SATA-IO (Serial ATA International Organization, SATA International Organization, original SATA working group) announced the SATA 2.5 specification, including the original SATA II. Most of the features - from 3Gbps and NCQ to Staggered Spin-up, Hot Plug, Port Multiplier and newer eSATA (External SATA, external SATA interface) )and many more.
1 integrated connection
First, the SATA2 hard drive has improved the performance technology and maintainability of the previous generation and introduced a number of technologies such as backplane interconnection. At the same time, it has added NCQ, out-of-order execution, data dispersion and aggregation. The improvement of this technology is to improve the overall performance. The protection of the new SATAII hard drive is now using these new technologies. At the same time, a maintainability initiative called EnclosureManagement was added, such as fan control, temperature control, new hard disk indication, bad hard disk indication, hard disk status indication, and so on. In addition, it introduces a Backplane Interconnect solution from the SCSI hard disk, which enables multiple hard disks to be directly connected to a backplane bus, freeing the possibility of connecting to their own ports, which saves a lot of time. The connection of the root cable helps the internal heat dissipation of the chassis, and can be replaced at any time even if the hard disk has a bad condition under the RAID.
2 speed increase
SATA2 hard drives can fully meet the needs of network storage and server storage for faster transfer speeds, and can connect a large number of hard drives, and the ideal speed can reach 480MB / s. With such transmission speed, data exchange can be faster and safer. Native Command Queuing is a very important technique in SATA2 hard disks. The command queue is a one-line incoming command that is analyzed and rearranged in order to optimize the execution sequence. Through the command queue, you can provide more efficient real-time analysis commands for your hard disk.
The (PS) port selector is also one of the features of SATA2. The PS mechanism allows two different host ports to be connected to one hard disk and a path for the secondary hard disk. (Port Multiplier) technology is a port multiplier. The Port Multiplier mechanism allows an active host to communicate with multiple hard disks.