path to find the command, and then recorded in the hash, when the execution of the hash to take, which will speed up the execution speed. And the hash doesn't hold internal commands.[[emailprotected] ~]# hash -r[[emailprotected] ~]# dateSat Jul 14 00:23:49 CST 2018[[emailprotected] ~]# hashhits command 1 Clears all caches in the hash, executes date, still reads from cache to date, but date has been moved to another location and cannot be exec
to promote their own professional software, it can repair the Physical Bad Sectors of the hard disk and does not affect the hard disk capacity, resulting in a daily price of more than 10 thousand yuan. Especially when Russia's PC-3000 entered China, this information was even more eye-catching.
[Note: PC-3000 is a commercial professional hard disk repair integrat
SAS hard Drive, is a serial connection to the next generation of SCSI technology, the use of serial technology to achieve higher transmission speed, and by shortening the connection line to improve the internal space. SAS is a parallel SCSI interface that develops a new interface. Improves storage system performance, availability, and scalability, and provides co
hard Disk Interface
The current hard disk interface type is not much, mainly IDE, SCSI, SATA three kinds. Many times the IDE replaces the Ultra ATA, many people are accustomed to the Ultra ATA hard disk is called IDE hard disk, but need to explain that the concept of the IDE is greater than ata--in principle all
the screen:
DATA Error reading drive C:
Abort, Retry, Ignore?
"Analysis processing" causes this failure, one is the disk body wear or improper use of hard disk, resulting in the loss of internal hard disk information, the second is the disk repeatedly read and write, file connection confusion, the allocation of too
capacity.
The internal parts of the mechanical hard disk are more complex than the solid-state hard disk, there are no motors and fans inside the solid-state hard disk, so in this aspect the solid-state drive will have a great advantage over the me
temperature, the difference is also possible. Generally speaking, the motherboard, hard disk temperature is lower than the CPU, the motherboard is generally 40-60 degrees between the temperature is acceptable, hard disk temperature, the normal IDE or SATA hard disk temperature should be below 55 degrees is normal.
What happens when the
, using the general use of the mobile hard disk box, it is best not to plug in the long-term work on the computer, mobile hard disk is used to temporarily exchange or store data, not a local hard disk. It is always possible to work in harsh environments compared to internal hard
replace, and then turn on the power, The system will soon be able to identify the device you are accessing and put it into use.
A real support for hot-swappable hard drives and optical drive prices can buy a few do not support hot plug of the same products, and the use of the extraction box + software, the average family can also have this ability, so that the value of the extraction box and
located on the first dozens of physical tracks of the physical surface of the hard disk, which is written by the vendor to the relevant internal management program. In addition to the Smart information table, there are low-level formatters, encryption and decryption programs, self-monitoring programs, automatic fixes, and so on. The monitoring software used by the user reads smart information through a com
1, the fatal weakness--vibration
Hard disk is a mechanical product, vibration can be said to be a hard enemy, hard disk internal structure is quite sophisticated, the head from thousands of rpm per minute of the surface of the disc only a few microns high, once the vibration is stronger then there will be read and wri
Jump out of hard drive misunderstandingSeveral common sense questions that have been misleading Gao Peng for many years are:1. Hard Disk logical bad sectors can be repaired, but physical bad sectors cannot be repaired. The actual situation is that bad channels are not divided into logical and physical bad channels. I don't know who invented these two concepts. Th
are not recognized can also be repaired, but it is difficult to partition when the 0 channels are bad.This is misleading. For example, if you have not collected and studied foreign-language materials for a long time, you cannot say that you have used them as your creed for a long time. There are many professional hard drive repair forums in foreign countries, where you can find that
disk work together. What are the advantages of solid-state drives?
The advantage of solid-state hard drives is that the internal reading and writing speed is very high, and the search speed is very fast. This speed can be used in the application, but also need to see the overall platform comprehensive indicators. Ideally, the solid-state hard disk with the comm
chassis and tighten each screw. In addition to the work process do not directly move the hard disk and mobile chassis, you need to move the computer to remember to take care of the light, to prevent hard disk collision caused damage.
2, dust
Dust on the hard disk damage is very large, it can be said that dust is the number one killer of the
1, the use of the environment
The dust will be adsorbed to the surface of the hard disk printed circuit board and the internal of the spindle motor by excessive dust in the working environment. The hard drive works in a more humid environment, reducing the insulation resistance. These two phenomena may cause the compu
How to fix the computer hard drive?
Hard Drive failure Scan
One: Unable to find the hard drive situation
For hard drives that appear with an "HDD not detected" error, fir
(24 hours * 7 days), mail support and online repair, Dell also provides server extension program and "Keep your hard drive service", so that it builders or managers more assured.
Dell "Keep your hard drive" allows the user to obtain replacement and replacement of the hard
of C disk, now starting from the 1 cylinder. Exit after saving BIOS settings. The hard drive is back to normal after being partitioned and formatted. There are some hard drives, self-test when prompted "HDD Controller error." Using the above method is invalid, only scrap.
Finally hint: many times seemingly complex hard
at the interface, to see whether the data line interface is blue, if it is blue for the USB3.0 interface.
3, look at the pins, under normal circumstances USB2.0 is a row of 4 pins, USB3.0 is the front 5 pins, 4 pins in the back row.
4, see Speed, General USB2.0 of the actual transmission speed of mb-40mb/s, and USB3.0 transmission speed can reach 60mb-140mb/s, you need to pay attention to the premise of your computer motherboard support USB3.0.
Third, data transmission rate (data Transfer Ra
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