What does it mean to read and write on a computer?

Most of the computer's reads and writes are done on the hard disk. When the system stores files to disk, it is carried out in the form of cylinders, heads, and sectors, that is, all sectors under the first head of the first track (that is, the first track of the first disk), and then the next head ,...... of the same cylinderOnce one cylinder is full, it advances to the next cylinder until all the file contents are written to disk.

The data is also read out in the same order. Data is read out by telling the disk controller to read out the cylindrical number, head number, and sector number (the three components of a physical address) where the sector is located. The disk controller directly steps the head component to the corresponding cylinder, strobe the corresponding head, and wait for the required sector to move under the head.

When a sector arrives, the disk controller reads out the headers for each sector, compares the address information in those headers with the head and cylinder number that is expected to be checked out (i.e., seeks), and then looks for the required sector number. When the disk controller finds the sector header, it decides whether to convert the write circuit, or read out the data and tail records, depending on whether it is tasked with writing or reading sectors. Once a sector is found, the disk controller must post-process the information for that sector before proceeding to the next one.

In the case of read data, the controller calculates the ECC code for this data and then compares the ECC code with the recorded ECC code. In the case of write data, the controller calculates the ECC code of this data and stores it with the data. The disk continues to rotate while the controller has carried out the necessary processing of the data in this sector.

The read-write micro-understanding is that the system pointer reads and writes instructions from memory.

Macro can be understood as reading and writing to the storage medium, since all these data calls run and save are always kept on the storage medium.

Reading is to display what is on the computer.

To write is to save what you manipulate.

Read is the output of the encoding from the hard disk.

To write is to write the encoding to the hard disk.

To put it simply. Read: Read, open, and then watch or listen.

Write: Modify, modify a file, change the properties of the original file.

Computer writing means that data is written to the platter through the head of the hard disk.

For example: 1. When installing the software, install the program on the system disk;

2. When creating a new document and proceeding, the data is continuously written to the disk;

3. When copying USB flash drive and CD-ROM files to hard disk.

Computer writing means that data is written to the platter through the head of the hard disk.

For example: 1. When installing the software, install the program on the system disk;

2. When creating a new document and proceeding, the data is continuously written to the disk;

3. When copying USB flash drive and CD-ROM files to hard disk.

All of the above are data writes.

There are several ways to write to a computer, which means that data is loaded into the computer.