file system organizes files to the operating system easier to work with them : the file system driver transmit OS data file names, sizes, attributes, location.A file system determines the maximum possible length of the file name, its maximum size and other parameters.
Different media have different types of file systems.By the way, the carrier does not have to be physical: there are, for example, virtual and network file systems. What are the types of file systems, depending on their purpose, that is, the media?
The first user is faced with file system designed for media with random access .Such carriers include, for example, hard disks.If you use the operating system of Windows, then, chances are you're dealing with a f
In many operating system distributions based on kernel Linux, as the default file system commonly used ext (Extended File System - extended file system).There are several versions of the file system - ext2, ext3, ext4 .In recent versions of Linux distributions based on kernel Linux (including Google Android), the filesystem is ext4.
his file systems also have optical media - CD and DVD discs.Universal is considered standard ISO 9660 , such disks readable by a computer with any operating system - Windows, Mac OS X, Unix.There are also file system format UDF , which is more suitable for high-volume disks (DVD, Blu-ray).There are other file systems for optical discs, less common.
from hard drives, flash drives and optical disk drives, we are confronted more frequently than with other carriers, so their file systems, and we are interested in most. But still should know what other types of file systems are :
- virtual file system;
- network file systems;
- filesystems for sequential access media (these include, for example, magnetic tapes);
- file system for flash memory;
- specialized file systems.
Let's talk more about the types of file systems for random access media, such as hard drives and flash drives. type specific file system file parameters affect, for example, the size of the file name .The system FAT32 maximum file name length - 255 characters.The NTFS specification - 32,768 characters, but some operating systems impose restrictions, so in reality the maximum length will be all the same to 255 characters Unicode.In ext2 / ext3 name length is limited to 255 bytes.
also depend on the file system file attributes possible .For example, FAT32 and NTFS file attributes are assigned to allow "read-only", "system", "hidden", "archive".A system ext2 offers attributes such as "set user ID», «setting group ID» and the so-called "sticky bit".
There are differences between file systems FAT32 and NTFS .Both file systems used Microsoft Windows, the system replaces the NTFS and FAT32 is used in the latest versions of the OS.The system FAT32 disk size is limited to about 8 terabytes in NTFS it can be 264 bytes.The maximum file size in the FAT32 - 4GB in NTFS - 264 bytes minus 1 kilobyte (theoretically), but in fact - 244 bytes minus 64 kilobytes.NTFS also greater than the maximum number of files, there are some other differences.
But it FAT32 system is still used on a USB flash drive (USB flash drives) , because it provides higher speed recording, reading and copying data.Therefore, most flash drives are formatted it in FAT32, and not to NTFS.Format the flash drive to NTFS, it makes sense only if you need to write it files larger than 4 GB.
Now you know, what are the main types of file systems and when you may run into one or another file system.