High Performance File System: Difference between revisions

Revision as of 06:19, 30 March 2019

Revision as of 06:20, 30 March 2019

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[[Windows NT 3.51]] can also read and write from local HPFS formatted drives. However, Microsoft discouraged using HPFS in Windows NT 4 and in subsequent versions despite upgrades to NT 4.1 operating satisfactorily with servers pre-formatted with HPFS. Microsoft even removed the ability of NT 3.51 to format an HPFS file system. Starting with [[Windows NT 4]] the filesystem driver ''PINBALL.SYS'' enabling the read/write access is not included in a default installation anymore. Later Windows versions do not ship with this driver.

Microsoft retained rights to OS/2 technologies, including the HPFS filesystem, after they ceased collaboration with IBM. Since Windows NT 3.1 was designed for more rigorous (enterprise-class) use than previous versions of Windows, it included support for HPFS (and NTFS) giving it a larger storage capacity than the [[FAT12]] and [[FAT16]] filesystems. However, since HPFS lacks a [[Journaling file system|journal]], any recovery after an unexpected shutdown or other error state takes progressively longer as the filesystem grows. A utility such as [[CHKDSK]] would need to scan each entry in the filesystem to ensure no errors are present, a problem which is vastly reduced on NTFS, wherewhich simply replays the journal is simply replayed.

== See also ==