Knowledge (XXG)

High Performance File System

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Though IBM still had rights to HPFS, its agreement with Microsoft to continue licensing the HPFS386 version was contingent upon the company paying Microsoft a licensing fee for each copy sold. This was a result of the Microsoft and IBM collaboration that gave both the right to use Windows and OS/2
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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
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enabling the read/write access is not shipped anymore. Later Windows versions do not ship with this driver. Note that this driver is limited to 4GB HPFS volumes.
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would need to scan each entry in the filesystem to ensure no errors are present, a problem which is vastly reduced on NTFS, which simply replays the journal.
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driver (allowing direct hardware access and direct interaction with the kernel) with built-in SMB networking properties that are usable by various server
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Separate datestamps for last modification, last access, and creation (as opposed to last-modification-only datestamp in then-times implementations of FAT)
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Due to the Microsoft dependence, limited partition size, file size limit of 2 GB and the long disk-check times after a crash, IBM ported the
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driver. Thus, HPFS386 is faster than HPFS and highly optimized for server applications. It is also highly tunable by experienced administrators.
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HPFS386's cache is limited by the amount of available memory in OS/2's system memory arena and was implemented in 32-bit
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provided with certain server versions of OS/2, or as added component for the server versions that did not come with it
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More efficient use of disk space (files are not stored using multiple-sector clusters but on a per-sector basis)
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Root directory located at the midpoint, rather than at the beginning of the disk, for faster average access
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have native read/write support for local disks and can even be installed onto an HPFS partition.
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An internal architecture that keeps related items close to each other on the disk volume
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How to get Windows NT 4, Windows 2000, and Windows XP to read HPFS partitions
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can also read and write from local HPFS formatted drives. Starting with
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Compared with FAT, HPFS provided a number of additional capabilities:
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Support for long file names (255 characters as opposed to FAT's
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versions 3.51 and earlier had native support for HPFS.
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However, since HPFS lacks a 116:Learn how and when to remove this message 769:C't Magazin für Computertechnik (German) 688: 614:, because NTFS and HPFS share the same 428:to improve upon the limitations of the 749:Electronic Developer Magazine for OS/2 583:support HPFS via third-party drivers. 7: 2493: 697:"Virtual Memory Problems under OS/2" 54:adding citations to reliable sources 782:"Appendix G — HPFS internals" 699:. www.os2voice.org. Archived from 331:Read-only, hidden, system, archive 14: 2348:Information Presentation Facility 2492: 2483: 2482: 2428:Systems Application Architecture 616:filesystem identification number 30: 432:file system. It was written by 41:needs additional citations for 2322:Warp Connect (PowerPC Edition) 743:Bridges, Dan (November 1996). 528:drivers for this file system: 269: 65:"High Performance File System" 1: 726:Ray Duncan (September 1989). 421:created specifically for the 2396:High Performance File System 591:Native support under Windows 415:High Performance File System 153:High Performance File System 1997:Filesystem-level encryption 765:"HPFS unter Windows NT 4.0" 573:, to OS/2 as a substitute. 163:; 34 years ago 2565: 2549:Assembly language software 2368:Windows Libraries for OS/2 844:Comparison of file systems 751:. Vol. 4, no. 10 672:Comparison of file systems 606:have no support for HPFS. 440:and added to OS/2 version 313:Access, Creation, Modified 18: 2534:Windows disk file systems 2478: 2258: 1907: 1623: 873: 839: 732:Microsoft Systems Journal 502:structure for directories 464:file names, in different 21:Hi Performance FileSystem 1947:Extended file attributes 1648:Compact Disc File System 618:in the partition table. 524:IBM offers two kinds of 448:, and released in 1988. 19:Not to be confused with 2353:Installable File System 2046:Installable File System 493:-based space allocation 1094:TiVo Media File System 958:Encrypting File System 638:the filesystem driver 567:journaling file system 509:HPFS also can keep 64 2544:Computer file systems 2408:Journaled File System 1089:Macintosh File System 763:Dieter Brors (1997). 343:Yes (only in HPFS386) 2363:Presentation Manager 2102:GUID Partition Table 1449:Distributed parallel 1197:Shared File System ( 703:on 24 September 2015 554:, whereas HPFS is a 50:improve this article 2423:System Object Model 2107:Apple Partition Map 2053:Virtual file system 1992:Access-control list 1106:NetWare File System 598:and its successors 519:extended attributes 280:Max filename length 130: 2391:Common User Access 2208:Christine Comaford 2097:Master Boot Record 1922:Data deduplication 1561:Google File System 1477:Google File System 963:Extent File System 925:Byte File System ( 646:capacity than the 204:Directory contents 161:November 1989 2519:Disk file systems 2506: 2505: 2465:Odin (Win32-OS/2) 2256: 2255: 2194:(chief architect) 2172:(1.0 to 1.3 only) 2115: 2114: 2022: 2021: 1912:Case preservation 1818: 1817: 1517: 1516: 1443: 1442: 1205:Smart File System 544:assembly language 408: 407: 378:operating systems 293:Single-byte from 126: 125: 118: 100: 2556: 2529:IBM file systems 2496: 2495: 2486: 2485: 2264: 2160: 2142: 2135: 2128: 2119: 1932:Execute in place 1905: 1638:Boot File System 1621: 1385: 921:Boot File System 871: 826: 819: 812: 803: 793: 788:. Archived from 776: 759: 757: 756: 739: 713: 712: 710: 708: 693: 613: 608:They listed the 426:operating system 300: 296: 288:Allowed filename 271: 246:(as implemented) 189: 171: 169: 164: 131: 121: 114: 110: 107: 101: 99: 58: 34: 26: 2564: 2563: 2559: 2558: 2557: 2555: 2554: 2553: 2539:OS/2 technology 2509: 2508: 2507: 2502: 2474: 2453: 2432: 2383: 2377: 2373:Workplace Shell 2336: 2265: 2252: 2243:John R. Patrick 2180: 2151: 2146: 2116: 2111: 2085: 2057: 2041:File system API 2018: 1978: 1954:File change log 1896: 1872:Record-oriented 1845:Self-certifying 1814: 1771: 1717: 1612: 1513: 1439: 1383: 1326: 1293: 866: 860: 856:Unix filesystem 835: 830: 779: 762: 754: 752: 742: 725: 722: 720:Further reading 717: 716: 706: 704: 695: 694: 690: 685: 668: 632:Windows NT 3.51 607: 593: 546:. HPFS386 is a 454: 376: 360: 349: 338: 298: 294: 289: 247: 239:Max volume size 214:File allocation 185: 167: 165: 162: 122: 111: 105: 102: 59: 57: 47: 35: 24: 17: 12: 11: 5: 2562: 2560: 2552: 2551: 2546: 2541: 2536: 2531: 2526: 2521: 2511: 2510: 2504: 2503: 2501: 2500: 2490: 2479: 2476: 2475: 2473: 2472: 2467: 2461: 2459: 2455: 2454: 2452: 2451: 2446: 2440: 2438: 2434: 2433: 2431: 2430: 2425: 2420: 2415: 2413:New Executable 2410: 2405: 2404: 2403: 2393: 2387: 2385: 2379: 2378: 2376: 2375: 2370: 2365: 2360: 2355: 2350: 2344: 2342: 2338: 2337: 2335: 2334: 2329: 2324: 2319: 2314: 2309: 2304: 2299: 2294: 2289: 2284: 2279: 2273: 2271: 2270:Major versions 2267: 2266: 2259: 2257: 2254: 2253: 2251: 2250: 2248:Mark Zbikowski 2245: 2240: 2235: 2230: 2225: 2220: 2215: 2210: 2205: 2200: 2198:Barry Appelman 2195: 2188: 2186: 2182: 2181: 2179: 2178: 2173: 2166: 2164: 2157: 2153: 2152: 2147: 2145: 2144: 2137: 2130: 2122: 2113: 2112: 2110: 2109: 2104: 2099: 2093: 2091: 2087: 2086: 2084: 2083: 2081:Log-structured 2078: 2073: 2067: 2065: 2059: 2058: 2056: 2055: 2050: 2049: 2048: 2038: 2032: 2030: 2024: 2023: 2020: 2019: 2017: 2016: 2015: 2014: 2009: 1999: 1994: 1988: 1986: 1984:Access control 1980: 1979: 1977: 1976: 1975: 1974: 1969: 1961: 1956: 1951: 1950: 1949: 1942:File attribute 1939: 1934: 1929: 1927:Data scrubbing 1924: 1919: 1914: 1908: 1902: 1898: 1897: 1895: 1894: 1889: 1884: 1882:Steganographic 1879: 1874: 1869: 1864: 1862:Log-structured 1859: 1854: 1849: 1848: 1847: 1842: 1837: 1826: 1824: 1820: 1819: 1816: 1815: 1813: 1812: 1807: 1802: 1797: 1792: 1787: 1781: 1779: 1773: 1772: 1770: 1769: 1764: 1759: 1754: 1751: 1746: 1741: 1736: 1731: 1725: 1723: 1719: 1718: 1716: 1715: 1710: 1705: 1700: 1695: 1690: 1685: 1680: 1675: 1670: 1665: 1660: 1655: 1650: 1645: 1640: 1635: 1630: 1624: 1618: 1614: 1613: 1611: 1610: 1603: 1598: 1593: 1588: 1583: 1578: 1573: 1568: 1563: 1558: 1553: 1548: 1543: 1533: 1527: 1525: 1519: 1518: 1515: 1514: 1512: 1511: 1504: 1499: 1494: 1489: 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395:DragonFly BSD 392: 388: 384: 381: 379: 373: 368: 364: 362: 356: 352: 346: 342: 340: 334: 330: 326: 322: 320: 316: 312: 308: 303: 292: 286: 282: 278: 274: 266: 263: 259: 257:Max file size 255: 252:(theoretical) 251: 245: 241: 237: 232: 229: 226: 222: 219: 216: 212: 209: 206: 202: 197: 193: 188: 184: 182: 181:Partition IDs 178: 175: 160: 156: 152: 148: 145: 141: 138: 136: 132: 120: 117: 109: 98: 95: 91: 88: 84: 81: 77: 74: 70: 67: –  66: 62: 61:Find sources: 55: 51: 45: 44: 39:This article 37: 33: 28: 27: 22: 2395: 2384:and concepts 2317:Warp Connect 2203:Joe Belfiore 2192:Ed Iacobucci 2036:File manager 1605: 1506: 1332:Flash memory 1299:Optical disc 1237:soft updates 1217:Soup (Apple) 1065: 867:non-rotating 833:File systems 790:the original 785: 772: 768: 753:. Retrieved 748: 735: 731: 705:. Retrieved 701:the original 691: 644: 639: 636:Windows NT 4 630: 620: 594: 575: 564: 562:technology. 560: 541: 535: 523: 508: 460:Support for 455: 414: 410: 409: 135:Developer(s) 112: 103: 93: 86: 79: 72: 60: 48:Please help 43:verification 40: 2444:eComStation 2233:Barry Leiba 2218:Naveen Jain 2213:Moshe Dunie 2002:Permissions 1617:Specialized 849:distributed 640:PINBALL.SYS 419:file system 399:eComStation 359:Transparent 350:compression 348:Transparent 339:permissions 337:File system 106:August 2013 2513:Categories 2437:Successors 2382:Technology 2358:LAN Server 2341:Components 2223:Susan Kare 2156:Developers 2028:Interfaces 2012:Sticky bit 1892:Versioning 1857:Journaling 1800:Rubberhose 1596:SMB (CIFS) 1388:host-side 755:2016-07-18 738:(5): 1–13. 683:References 604:Windows Me 600:Windows 98 596:Windows 95 585:Windows NT 466:code pages 462:mixed case 387:Windows NT 361:encryption 328:Attributes 290:characters 224:Bad blocks 199:Structures 158:Introduced 76:newspapers 2470:Team OS/2 2170:Microsoft 2163:Companies 1887:Synthetic 1830:Clustered 1777:Encrypted 1708:OverlayFS 1317:ISO 13490 893:Amiga OFS 888:Amiga FFS 438:Microsoft 375:Supported 275:Unlimited 150:Full name 140:Microsoft 2488:Category 2458:See also 2332:Warp 4.5 2327:Warp 4.0 2312:Warp 3.0 1972:Symbolic 1901:Features 1877:Semantic 1785:eCryptfs 1729:configfs 1698:SquashFS 1586:POHMELFS 1487:OrangeFS 1312:ISO 9660 1232:UFS/UFS2 1180:Reliance 1168:ReiserFS 1014:Files-11 908:bcachefs 865:Disk and 677:HPFS BPB 666:See also 515:metadata 452:Overview 305:Features 272:of files 174:OS/2 1.2 2498:Commons 2401:Pinball 2090:Layouts 2076:Default 1739:debugfs 1713:UnionFS 1607:more... 1540:OpenAFS 1508:more... 1173:Reiser4 1143:OpenZFS 1034:HAMMER2 990:ext3cow 970:Episode 707:11 June 656:journal 552:daemons 536:HPFS386 500:B+ tree 487:of data 417:) is a 218:B+ tree 168:1989-11 166: ( 90:scholar 2449:ArcaOS 2418:Shadow 2185:People 1963:Links 1937:Extent 1867:Object 1835:Global 1753:specfs 1749:procfs 1744:kernfs 1722:Pseudo 1703:UMSDOS 1658:Davfs2 1653:cramfs 1591:Hadoop 1571:Lustre 1457:BeeGFS 1423:NILFS2 1158:QNX4FS 1121:NILFS2 1029:HAMMER 1019:Fossil 775:: 306. 660:CHKDSK 556:ring 3 548:ring 0 491:Extent 403:ArcaOS 234:Limits 208:B tree 92:  85:  78:  71:  63:  2063:Lists 2007:Modes 1852:Flash 1823:Types 1805:SSHFS 1790:EncFS 1767:WinFS 1762:tmpfs 1757:sysfs 1734:devfs 1668:FTPFS 1663:EROFS 1601:SSHFS 1482:OCFS2 1435:UBIFS 1430:YAFFS 1418:NILFS 1413:LogFS 1408:JFFS2 1364:EROFS 1354:exFAT 1259:Xiafs 1242:WAPBL 1227:UBIFS 1138:OneFS 1116:NILFS 1111:Next3 1101:MINIX 1007:exFAT 935:Btrfs 903:AthFS 883:AdvFS 652:FAT16 648:FAT12 581:Linux 483:Less 391:Linux 370:Other 319:Forks 172:with 97:JSTOR 83:books 2292:1.21 2149:OS/2 1967:Hard 1959:Fork 1840:Grid 1693:MVFS 1688:NOVA 1683:LTFS 1678:Lnfs 1673:FUSE 1643:CDfs 1633:AXFS 1628:Aufs 1566:GPFS 1551:Coda 1502:Xsan 1492:PVFS 1472:GFS2 1467:CXFS 1462:Ceph 1403:JFFS 1398:CHFS 1379:NVFS 1369:F2FS 1359:TFAT 1344:APFS 1334:and 1278:z/OS 1269:Xsan 1254:WAFL 1249:VxFS 1222:Tux3 1212:SNFS 1194:SFS 1163:ReFS 1133:NTFS 1085:MFS 1071:HTFS 1066:HPFS 1061:HFS+ 1024:GPFS 995:ext4 985:ext3 980:ext2 954:EFS 945:CXFS 940:CVFS 927:z/VM 912:BFS 898:APFS 878:ADFS 709:2015 650:and 624:and 610:NTFS 602:and 579:and 423:OS/2 411:HPFS 383:OS/2 299:0xFF 295:0x20 268:Max 228:List 187:0x07 129:HPFS 69:news 2307:2.1 2302:2.0 2297:1.3 2287:1.2 2282:1.1 2277:1.0 2176:IBM 1810:ZFS 1795:EFS 1581:NFS 1576:NCP 1556:DFS 1546:AFP 1536:AFS 1523:NAS 1497:QFS 1374:JFS 1349:FAT 1336:SSD 1322:UDF 1307:HSF 1288:Sun 1284:ZFS 1274:zFS 1264:XFS 1190:RFS 1153:QFS 1148:PFS 1128:NSS 1081:LFS 1076:JFS 1055:MVS 1051:HFS 1041:HFS 1002:FAT 975:ext 950:DFS 626:3.5 577:DOS 571:JFS 526:IFS 513:of 472:8.3 446:IBM 442:1.2 430:FAT 323:Yes 297:to 270:no. 242:64 192:MBR 144:IBM 52:by 2515:: 1531:9P 1199:VM 784:. 771:. 767:. 747:. 734:. 730:. 569:, 517:(" 511:KB 401:, 397:, 393:, 389:, 385:, 365:No 353:No 262:GB 260:2 250:TB 248:2 244:GB 142:, 2141:e 2134:t 2127:v 1542:) 1538:( 1290:) 1286:( 1280:) 1276:( 1201:) 1057:) 1053:( 1047:) 1043:( 929:) 825:e 818:t 811:v 773:1 758:. 736:4 711:. 413:( 194:) 190:( 170:) 119:) 113:( 108:) 104:( 94:· 87:· 80:· 73:· 46:. 23:.

Index

Hi Performance FileSystem

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Developer(s)
Microsoft
IBM
OS/2 1.2
Partition IDs
0x07
MBR
B tree
B+ tree
List
GB
TB
GB
Forks
File system
permissions

Transparent
encryption

operating systems
OS/2

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