First, Disk Management (detailed explanation of the principle of the hard disk)
Mechanical hard disk---(CPU, memory is electrical equipment)
USB Disc Floppy Disk
The hard drive has a "low-level format" before the factory, dividing the track
Partitioning: Creating a standalone file system
Mbr:master booter record master boot records 0 disks 0 Tracks 0 sectors 512 bytes, not belonging to any one operating system. The operating system cannot access the MBR directly. Separate storage space outside the operating system. Divided into 3 segments,
The first paragraph: 1-466 bytes put is bootloader, boot loader, is a program, boot a partition on the operating system, let the operating system start up, called the Master boot record.
Second paragraph: 64 bytes
Each 16 bytes, identifies a partition. So the hard drive can only have 4 primary partitions
Third paragraph: last 2 bytes: called Magic number, magic count, Mark MBR is valid
The computer just turned on is (BIOS data is a program stored in RAM, the function is to complete its own computer health check) Biso This program will map the contents of the RAM to the first space in memory. As soon as the CPU starts loading the code in this space, the BIOS is loaded and the self-test is performed. Self-test completed according to the Biso set in the boot sequence, looking for the boot device of the MBR, find the Biso program to load Biso the first paragraph of the program is bootloader, loaded into memory (bootloader loaded after the BIOS exited). Bootloader loads the second segment of the MRB and loads the partition table. Locate the partition with the operating system and load the operating system kernel. At this point bootloader control to the operating system kernel, the kernel to find a variety of devices and file systems. Start complete.
Solid Hard Drive
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Lesson eighth-The third one on disk and file system management
