Conceptual Analysis of Linux Disk Partitions and File Systems

The Linux file system refers to the management files, programs, and data related to the system, including disks. The disk and file system under Linux system is obviously different from other systems. Let me introduce it to you in detail today.

1. Disk

1.IO interface type

(1) Transmission type classification

Parallel port: Multiple devices can be connected to the same cable; Br>

IDE one bus two, master, from

SCSI: wideband: 16-1; narrowband: 8-1

serial port: only one device can be connected to the same cable;

(2) Hard disk type classification (theoretical transmission data)

IDE(ata): parallel port, 133MB/s

SCSI: parallel port, Ultrascsc320, 320MB/S, UltraSCSI640 , 640MB/S

SATA: serial port, 6gbps

SAS: serial port, 6gbps

USB: serial port, 480MB/s

2. Hard disk type and Disk Introduction

(1) Mechanical Hard Disk: Internal Vacuum

Disk: Disk with magnetic material on the front and back sides, all disks are fixed by a motor, fixed angular velocity

There is one head on each of the front and back of the disc, and all the heads are fixed on one arm

Average seek time: 5400rpm, 7200rpm, 10000rpm, 15000rpm

Track: Formatted on each disc.

sector: 512bytes unit

cylinder: cylinders of the same number on different discs, partition The faster the division is based on the cylinder implementation

the closer the cylinder is to the outer partition. C drive on the outside of the

(2) solid state drive

Similar to multiple parallel U disk, the working mode simulates the mechanism of the mechanical hard disk.

Electrical equipment, speed personal notebook is 3 to 5 times the original, read 400 iops (io per second), write 200iops Previous 123 Next page Total 3 pages