reading and writing will accelerate the wear and tear of the head arm and head motor. Frequent reading and writing to a disk area will increase the temperature of the area, it will affect the stability of the magnetic medium in this area and lead to read and write errors. The high temperature will make the area closer to the disc due to hot expansion (under norm
First, Disk Basics
The basic components of a disk can be divided into the following parts: Head, Disc, disk, track, cylinder, sector and so on. 1, platter and plate surface
A hard disk usually has multiple platters, the disc is divided into two sides, where the effective surface is called
Tips: After reading the MySQL index behind the data structure and algorithm principles, inside there said:"The designers of the database system have cleverly used the principle of disk pre-reading to set the size of a node equal to one page, so that each node needs only one I/O to be fully loaded." In order to achieve this, in the actual implementation of the B-t
Recently, Jinshan announced WPS Mobile version 5.5 officially released. This version of the update will bring Jinshan fast disk and other bi-directional reading and writing functions, and further improve the mobile office and network disk combination.
In addition, WPS Mobile version 5.5 will also bring powerword a key search words, cloud document recording funct
Reading Notes (10): Linux disk and file system management (3), Linux private dish
This article mainly summarizes the commands used to manage hard disks and file systems in Linux. When we add a hard disk to the system, what steps do we need to take to truly use it? You can perform the following steps:
(1) partition the disk
Reading Notes (10): Linux disk and file system management (3)
This article mainly summarizes the commands used to manage hard disks and file systems in Linux. When we add a hard disk to the system, what steps do we need to take to truly use it? You can perform the following steps:
(1) partition the disk and create avai
right) connection is intact, the circuit board connected to the drive chip between the circuit is smooth. If the bald-headed self-test issued a red light, but do not seek, then look at the control of the bald-headed stepper motor and circuit board connector (right) is connected to the link between the driver chip circuit is smooth. Finally check if the drive chip is damaged.
If everything is OK, still do not read the disk, please check the laser hea
Reading Notes (8): Linux disk and File System Management (1), Linux private dish
The most traditional Disk File System in Linux is EXT2 (of course, it has now been upgraded to EXT4). This chapter mainly introduces the disk file system in Linux, this article focuses on the Linux EXT2 file system.
We all know that
statement: This article is "Brother Bird's Linux private dish" reading summary.
Disk Basics Dot Finishing
The main components of the whole disk are: a rounded disk disc (a portion of the main record data); a mechanical arm, with a disk-
considered. The data files must be balanced between reading, writing, and available capacity.
RAID 0: provides data strip and efficient I/O performance, but does not provide data redundancy protection. Therefore, SQL Server is generally not used.
RAID 1: provides full data redundancy protection, low IO performance, and high costs. You can consider placingSingle. If multiple transaction log files are placed, the sequential IO operations of each log fi
Solution to the abnormal sound during hard disk reading and writing in Ubuntu
Compared with your laptop, Ubuntu Linux does sound much better than Windows. Of course, when reading and writing data in Windows, the sound is slightly lower.
After checking a lot of information, I finally found a command hdparm, which can set many parameters related to the hard
document occupies only one inode; therefore, the number of files the file system can establish is related to the number of Inode; 7, The block of the file records the actual data of the file, the directory block is recorded in the directory underground file name and its inode number; 8, log file system will be more than a record area, at any time to record the main activities of the file system, can speed up the system recovery time; 9, the Linux file system for increased performance, will
I compared my desktop, but it does sound much better in Linux than in windows. Of course, reading and writing data in Windows is a little less.
After checking a lot of information, I finally found a command. Hdparm ,It can set many parameters related to the hard disk, as well as the hard disk noise.
The command is described as follows:
Usage: hdparm [Option
Read procedure: Disk data---kernel state buffers (kernel-state data may be written back to disk)--user-state buffers (user-state data may be swapped to swap or write back to kernel-state buffers)a a user-state process would have an array of file descriptors, each time the open file adds an element to the array and creates a file object where the most important field in the file object is the pointer to the
Optical drive in the use of a period of time, read disk performance is getting worse, optical drive reading capacity of the poor, can be resolved by the following methods.
1. Cleaning agent Bald head. Optical drive in normal use, life is generally 2 to 3 years, the general user can use cotton swabs dipped in alcohol to clean the laser head. When you open the optical drive, you must pay attention to the slo
Reprint: http://mobile.zol.com.cn/296/2968659_all.html#p2968659 Mobile micro-drive Read Speed >50mb/sBefore starting today's topic, please go back with the author, recalling the 2011 annual multi-media phone cross-evaluation. The results of the cross-evaluation is not the focus, the key is not to know that we have not noticed that the rabbit ran in one of the points, it is worth our attention, it is "SD card reading speed." Each review will always hav
Compared with your own laptop, UbuntuLinux does sound much better than Windows. Of course, when reading and writing data in Windows, the sound is slightly lower. After checking a lot of information, I finally found a command hdparm, which can set many parameters related to the hard disk, and the hard disk sound can also be used. Command Description: Usage: hdparm
How to speed up disk reading in Linux-general Linux technology-Linux technology and application information. Perform some settings in Linux to enable Linux to work in 32-bit input/output mode and DMA channel mode.
When setting, enter the command/sbin/hdparm-cl/dev/hda in the Linux Command interface to enable the 32bit transmission mode, run/sbin/hdparm-dl/dev/hda to enable the DMA transmission mode, then
Now I will summarize the short-term disk reading method and introduce it to you. Note:
(1) These methods only practice previous theories. It has been proved many times in practice.
(2) The following disk viewing methods may not be useful for every one of them, or you will not be able to earn any loss. I hope you can give it a trigger.
1. Each plate has i
When users use the optical drive to read the disc, sometimes the CD-ROM will have a "JoJo" sound. This is a situation many users will encounter, due to the optical drive's ability to read the disk or poor quality of the disc, the surface damage caused.
At this time, although the optical drive can check the CD and CD format, but in the reading data, the laser head will be in the action of the servo c
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