the object
Friday, September 16th, 2011Fifth, Cache Cache (Cache memory) on the hard disk controller is a memory chip with very fast access speed, it is hard disk storage, and external interfaces between the internal buffer. Since the internal hard disk data transfer speed and interface transfer rate different from the outside world, the cache buffer in which to play a role.
Cache size and speed is directly related to the hard disk transfer speed of the important factors that can greatly improve the overall performance of the hard disk. When the hard drive when accessing fragmented data on the hard drive and need to keep the exchange of data between memory, a large cache, you can scratch those fragmentary data in the cache, reducing the load outside the system,protection device
but also to improve the data transmission speed
Data protection 1. SMART Technologies SMART technology, full name is Self-Monitoring, Analysis and Reporting Technology, or “self-monitoring, analysis and reporting technology.” In the ATA-3 standard, SMART technology has been formally established.
SMART monitors the object, including head, disk, motor, circuit, etc., from the hard drive of the monitoring circuit and monitoring software on the host object being monitored and the operation history, and the default security values were analyzed and compared,data transmission
when a security value outside the scope of the situation, we will automatically warn the user, while the more advanced technology also can alert the network administrator’s attention, automatically reduces the drive speed, the important data file transfer over other security sectors, and even file backup to a hard drive or other storage device.
Through the SMART technology, really hard you can predict the potential failure to effectively improve data security. But we should also see, SMART technology is not a panacea, it can only gradual onset of failure to monitor, but for some unexpected failures, such as a sudden crack disc, hard disk, no matter how smart can not do anything. So anyway, the backup is still required.
2. DFT technique DFT (Drive Fitness Test, drive health monitoring) technology is the development of IBM’s PC hard drive for data protection technology to access it by using the DFT DFT of IBM hard disk drives to detect micro-code, allowing users to quickly and easily detect the hard drive operating conditions. According to the study, in the user’s hard drive back to repair,semiconductor refrigeration
most of the hard disk itself is good.
DFT can reduce the occurrence of this situation, to save users time and effort, to avoid data loss due to miscarriage of justice. It is a separate partition on the hard disk space to the DFT procedures, even if the software does not work in the case can call.
DFT microcode error events can be automatically registered, and registration data is saved to the hard drive in the reserved area. DFT microcode also the physical hard disk in real-time analysis, such as by reading the servo position error signal to calculate the disc exchange, server stability, repeated moves and other parameters, and gives graphic reference for experienced users or technicians. This is a new concept, the hard disk subsystem control signals can be used to analyze the mechanical status of the hard disk itself. The DFT is an independent software does not rely on operating system software, which can be any other software on the user failed to run.
Extended partition as the primary partition table can only be divided into four partitions, can not meet demand, so the design of an extended partition format. Basically, the extended partition information is stored in a linked list, but there are some special places. First, the primary partition table in extended partition must be a basic item, all extended partitions are attached to it, that all other space in the extended partition must be included in the basic extended partition.fashion jewelry supplier For DOS / Windows, the extended partition type is 0×05.
In addition to the basic extended partition other than list all the places in the form of an extended partition cascade storage, after an extended partition of the data records of the previous partition table in extended partition, but the two do not overlap the extended partition space. Extended partition is similar to a full hard disk, the need to further partition to use. But each can have only one extended partition, other partitions.
This partition in DOS / Windows environment, is logical. Therefore, an extended partition for each partition table (also stored in the extended partition of the first sector) can only have two partitions in the data items (including an extended partition the next data item).