High Performance File System
HPFS is the file system of OS / 2
It was introduced in 1989 with the 2 version 1.2 as a replacement for the FAT16 file system. It supports in contrast to the latter partitions up to a size of 2 Tebibyte and long file names up to 255 characters, and so-called extended attributes that will allow you to bind arbitrary meta-information with a size up to 64 KB per file, a file that without their contents change. How can for example define clearly which application a file can be edited. At the same time This eliminates the pressure of having to give a file a particular file extension (such as Windows ).
The lack of journaling means that the file system is vulnerable to crashes. Due to this and the size limits for files and partitions was later developed by IBM, the journaled file system, which has been supported since 2000 by OS / 2.
HPFS was implemented in OS / 2 in two variants. The standard version was the operating system, in addition, there was a 32 -bit version called HPFS386, which was, among other things part of the LAN server.
The first versions of Windows NT supported in addition to the then-new file system is NTFS and HPFS, and could be installed on HPFS partitions when needed. Windows NT 4.0 supports standard HPFS no more, unless there is an update installation from an existing Windows NT 3.51 installation carried out, but the driver can also be manually copied and installed by the Windows NT 3.51 CD. In Windows 2000, the necessary driver on the Windows 2000 CD-ROM is available and can be installed if required. In all cases, the supplied driver only supports partitions up to a size of 4 GiB, larger partitions are not supported and destroyed when accessed. In Windows XP, the HPFS support was completely removed - even one installed on an HPFS partition Windows NT operating system can no longer start from now on.
- File system
- OS/2-Betriebssystemkomponente
- Windows operating system component