Knowledge (XXG)

Macintosh File System

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456:. There is always one empty folder on the volume, and if it is altered in any way (such as by adding or renaming files), a new Empty Folder appears, thus providing a way to create new folders. MFS stores all of the file and directory listing information in a single file. The Finder creates the illusion of folders, by storing all files as pairs of directory handles and file handles. To display the contents of a particular folder, MFS scans the directory for all files in that handle. There is no need to find a separate file containing the directory listing. 32: 459:
The Macintosh File System does not support volumes over 20 MB in size, or about 1,400 files. While this is small by today's standards, at the time it seemed very expansive when compared to the
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Folders exist as a concept on the original MFS-based Macintosh, but work completely differently from the way they do on modern systems. They are visible in
664: 710: 482:(formerly Mac OS X) has no built-in support for MFS, an example VFS plug-in from Apple called MFSLives provides read-only access to MFS volumes. 1158: 1133: 20: 2447: 822: 2390: 1865: 2380: 1551: 1360: 888: 512: 2002: 642: 83: 575: 2437: 1668: 1390: 1350: 969: 658: 467: 145: 1100: 678: 1447: 604: 2385: 1801: 1375: 703: 44: 2306: 2154: 2086: 1380: 1187: 340: 474:, Apple removed support for writing to MFS volumes “as such writes often resulted in errors or system hangs”, and in 54: 48: 40: 2442: 2191: 2181: 2171: 1563: 1153: 1126: 554: 491: 437:
does not allow users to create names longer than 63 characters (31 characters in later versions). MFS is called a
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version, locked, type, creator, Finder window, location in Finder window, Finder flags
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This article is about the MFS file system. For other Macintosh file systems, see
2043: 1142: 1069: 1004: 939: 934: 438: 403: 391: 187: 2321: 2119: 1014: 919: 862: 672:—HFS used in Macs with 128K ROMs different from MFS used in Macs with 64K ROMs 579: 475: 453: 2276: 2017: 1895: 1626: 1494: 1489: 1064: 1034: 1029: 878: 827: 817: 460: 298: 2094: 2038: 2007: 1796: 1621: 1477: 1370: 1323: 1217: 974: 768: 763: 753: 748: 733: 364: 222: 211: 135: 2048: 2022: 1849: 1482: 1452: 1343: 1299: 924: 893: 883: 549: 517: 2058: 1967: 1962: 1766: 1467: 1044: 1019: 959: 807: 2316: 2114: 2099: 2076: 2071: 2066: 1977: 1972: 1910: 1791: 1744: 1739: 1732: 1727: 1722: 1717: 1673: 1663: 1568: 1536: 1430: 1425: 1420: 1316: 1244: 1192: 479: 688: 1987: 1952: 1942: 1937: 1875: 1811: 1781: 1776: 1712: 1707: 1678: 1587: 1578: 1531: 1472: 1442: 1333: 1304: 1294: 1289: 1254: 1236: 1024: 1115: 1111: 692: 1593: 1573: 1462: 1364: 25: 685:—limitation due to MFS on an external 400K floppy drive disk 478:
support for MFS volumes was removed altogether. Although
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to allow storage of structured data, and for storing
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MFS was introduced with the original 452:windows, but not in the open and save 21:Macintosh file system (disambiguation) 609:Apple Developer Documentation Archive 7: 413:MFS is notable both for introducing 665:Resurrecting MFS Macintosh Floppies 279:January 1, 1904 – February 6, 2040 16:Disk file system by Apple Computer 14: 661:—MFS volume support in Mac OS 7.x 254:Any printable character except “ 30: 889:Macintosh Programmer's Workshop 545:"HFS File Structure Explained" 511:Langowski, Jörg (April 1985). 230: 1: 633:Apple Computer, Inc. (1985). 576:"Technote 1096: Mac OS 7.6.1" 637:. New York: Addison-Wesley. 627:General and cited references 2448:Macintosh operating systems 2307:Filesystem-level encryption 410:computer in January 1984. 2464: 1154:Comparison of file systems 635:Inside Macintosh Volume II 492:Comparison of file systems 18: 2217: 1933: 1183: 1149: 2257:Extended file attributes 1958:Compact Disc File System 1010:Multiprocessing Services 970:Hierarchical File System 468:Hierarchical File System 463:'s 400 KB floppy drive. 423:graphical user interface 373:Mac OS 7.6.1 (read-only) 39:This article includes a 2438:Apple Inc. file systems 2356:Installable File System 659:Apple Tech Article 9502 68:more precise citations. 1404:TiVo Media File System 1268:Encrypting File System 421:needed to support the 271:Creation, modification 125:; 40 years ago 1399:Macintosh File System 990:Macintosh File System 380:Macintosh File System 123:January 24, 1984 115:Macintosh File System 2412:GUID Partition Table 1759:Distributed parallel 1507:Shared File System ( 433:in length, although 107:Apple Computer, Inc. 2417:Apple Partition Map 2363:Virtual file system 2302:Access-control list 1416:NetWare File System 808:Graphing Calculator 241:Max filename length 162:Apple Partition Map 98: 2407:Master Boot Record 2232:Data deduplication 1871:Google File System 1787:Google File System 1273:Extent File System 1235:Byte File System ( 915:Appearance Manager 858:System Information 739:System 2, 3, and 4 681:2007-07-16 at the 174:Directory contents 41:list of references 2443:Disk file systems 2425: 2424: 2332: 2331: 2222:Case preservation 2128: 2127: 1827: 1826: 1753: 1752: 1515:Smart File System 1109: 1108: 1086:Memory management 995:Macintosh Toolbox 676:Q&A: Mac Plus 466:Apple introduced 377: 376: 360:operating systems 94: 93: 86: 2455: 2242:Execute in place 2215: 1948:Boot File System 1931: 1695: 1231:Boot File System 1181: 1136: 1129: 1122: 1113: 1079:Related articles 1050:Startup sequence 828:QuickTime Player 713: 706: 699: 690: 648: 620: 619: 617: 616: 601: 595: 594: 592: 591: 572: 566: 565: 563: 562: 543:Brecher, Steve. 540: 534: 533: 531: 530: 508: 439:flat file system 390:format (or disk 257: 249:Allowed filename 232: 159: 133: 131: 126: 99: 89: 82: 78: 75: 69: 64:this article by 55:inline citations 34: 33: 26: 2463: 2462: 2458: 2457: 2456: 2454: 2453: 2452: 2428: 2427: 2426: 2421: 2395: 2367: 2351:File system API 2328: 2288: 2264:File change log 2206: 2182:Record-oriented 2155:Self-certifying 2124: 2081: 2027: 1922: 1823: 1749: 1693: 1636: 1603: 1176: 1170: 1166:Unix filesystem 1145: 1140: 1110: 1105: 1074: 1060:System suitcase 940:Command key (⌘) 898: 867: 848:Software Update 833:Network Browser 813:Keychain Access 773: 722: 717: 683:Wayback Machine 655: 645: 632: 629: 624: 623: 614: 612: 603: 602: 598: 589: 587: 574: 573: 569: 560: 558: 542: 541: 537: 528: 526: 510: 509: 505: 500: 488: 408:Apple Macintosh 372: 358: 342: 331: 320: 284:Date resolution 255: 250: 207:Max volume size 184:File allocation 157: 129: 127: 124: 90: 79: 73: 70: 59: 45:related reading 35: 31: 24: 17: 12: 11: 5: 2461: 2459: 2451: 2450: 2445: 2440: 2430: 2429: 2423: 2422: 2420: 2419: 2414: 2409: 2403: 2401: 2397: 2396: 2394: 2393: 2391:Log-structured 2388: 2383: 2377: 2375: 2369: 2368: 2366: 2365: 2360: 2359: 2358: 2348: 2342: 2340: 2334: 2333: 2330: 2329: 2327: 2326: 2325: 2324: 2319: 2309: 2304: 2298: 2296: 2294:Access control 2290: 2289: 2287: 2286: 2285: 2284: 2279: 2271: 2266: 2261: 2260: 2259: 2252:File attribute 2249: 2244: 2239: 2237:Data scrubbing 2234: 2229: 2224: 2218: 2212: 2208: 2207: 2205: 2204: 2199: 2194: 2192:Steganographic 2189: 2184: 2179: 2174: 2172:Log-structured 2169: 2164: 2159: 2158: 2157: 2152: 2147: 2136: 2134: 2130: 2129: 2126: 2125: 2123: 2122: 2117: 2112: 2107: 2102: 2097: 2091: 2089: 2083: 2082: 2080: 2079: 2074: 2069: 2064: 2061: 2056: 2051: 2046: 2041: 2035: 2033: 2029: 2028: 2026: 2025: 2020: 2015: 2010: 2005: 2000: 1995: 1990: 1985: 1980: 1975: 1970: 1965: 1960: 1955: 1950: 1945: 1940: 1934: 1928: 1924: 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333: 327: 326: 323: 315: 314: 311: 307: 306: 295: 289: 288: 285: 281: 280: 277: 273: 272: 269: 268:Dates recorded 265: 264: 260: 259: 252: 246: 245: 244:255 characters 242: 238: 237: 234: 226: 225: 219: 215: 214: 208: 204: 203: 199: 198: 195: 191: 190: 185: 181: 180: 175: 171: 170: 166: 165: 155: 149: 148: 143: 139: 138: 121: 117: 116: 113: 109: 108: 105: 92: 91: 74:September 2013 49:external links 38: 36: 29: 15: 13: 10: 9: 6: 4: 3: 2: 2460: 2449: 2446: 2444: 2441: 2439: 2436: 2435: 2433: 2418: 2415: 2413: 2410: 2408: 2405: 2404: 2402: 2398: 2392: 2389: 2387: 2384: 2382: 2381:Cryptographic 2379: 2378: 2376: 2374: 2370: 2364: 2361: 2357: 2354: 2353: 2352: 2349: 2347: 2344: 2343: 2341: 2339: 2335: 2323: 2320: 2318: 2315: 2314: 2313: 2310: 2308: 2305: 2303: 2300: 2299: 2297: 2295: 2291: 2283: 2280: 2278: 2275: 2274: 2272: 2270: 2267: 2265: 2262: 2258: 2255: 2254: 2253: 2250: 2248: 2245: 2243: 2240: 2238: 2235: 2233: 2230: 2228: 2227:Copy-on-write 2225: 2223: 2220: 2219: 2216: 2213: 2209: 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908: 907: 905: 901: 895: 892: 890: 887: 885: 882: 880: 877: 876: 874: 870: 864: 861: 859: 856: 854: 851: 849: 846: 844: 841: 839: 836: 834: 831: 829: 826: 824: 821: 819: 818:PictureViewer 816: 814: 811: 809: 806: 804: 801: 799: 796: 793: 791: 788: 786: 783: 782: 780: 776: 770: 767: 765: 762: 757: 756: 755: 752: 750: 747: 745: 742: 740: 737: 735: 732: 731: 729: 725: 721: 714: 709: 707: 702: 700: 695: 694: 691: 684: 680: 677: 674: 671: 668: 666: 663: 660: 657: 656: 652: 646: 644:0-201-17732-3 640: 636: 631: 630: 626: 610: 606: 600: 597: 586:on 1999-04-29 585: 581: 577: 571: 568: 557:on 2008-04-26 556: 552: 551: 546: 539: 536: 525:on 2007-09-27 524: 520: 519: 514: 507: 504: 497: 493: 490: 489: 485: 483: 481: 477: 473: 469: 464: 462: 457: 455: 451: 446: 444: 440: 436: 432: 428: 424: 420: 416: 411: 409: 405: 401: 397: 394:) created by 393: 389: 385: 381: 370: 366: 363: 361: 355: 350: 346: 344: 338: 334: 328: 324: 322: 316: 312: 308: 304: 300: 296: 294: 290: 286: 282: 278: 274: 270: 266: 261: 253: 247: 243: 239: 235: 227: 224: 220: 218:Max file size 216: 213: 209: 205: 200: 196: 192: 189: 186: 182: 179: 176: 172: 167: 163: 156: 154: 153:Partition IDs 150: 147: 144: 140: 137: 136:System 1 122: 118: 114: 110: 106: 104: 100: 88: 85: 77: 67: 63: 57: 56: 50: 46: 42: 37: 28: 27: 22: 2346:File manager 1915: 1816: 1642:Flash memory 1609:Optical disc 1547:soft updates 1527:Soup (Apple) 1398: 1177:non-rotating 1143:File systems 1045:Sosumi sound 989: 955:Creator code 930:Balloon help 778:Applications 634: 613:. Retrieved 611:. 2006-11-09 608: 599: 588:. Retrieved 584:the original 570: 559:. Retrieved 555:the original 548: 538: 527:. Retrieved 523:the original 516: 506: 472:Mac OS 7.6.1 465: 458: 454:dialog boxes 447: 412: 404:floppy disks 398:for storing 383: 379: 378: 142:Succeeded by 103:Developer(s) 80: 71: 60:Please help 52: 2312:Permissions 1927:Specialized 1159:distributed 1070:WorldScript 1005:MultiFinder 794:Drive Setup 443:directories 392:file system 341:Transparent 332:compression 330:Transparent 321:permissions 319:File system 188:Linked list 66:introducing 2432:Categories 2338:Interfaces 2322:Sticky bit 2202:Versioning 2167:Journaling 2110:Rubberhose 1906:SMB (CIFS) 1698:host-side 965:Extensions 935:Bomb error 920:Apple menu 903:Technology 863:SimpleText 798:DVD Player 785:Calculator 615:2023-03-13 605:"MFSLives" 590:2013-09-16 580:Apple Inc. 561:2023-03-23 529:2023-03-23 476:Mac OS 8.0 431:characters 369:Mac OS 7.6 343:encryption 310:Attributes 276:Date range 251:characters 194:Bad blocks 169:Structures 130:1984-01-24 120:Introduced 2197:Synthetic 2140:Clustered 2087:Encrypted 2018:OverlayFS 1627:ISO 13490 1203:Amiga OFS 1198:Amiga FFS 1065:Type code 1035:QuickTime 1030:QuickDraw 879:HyperCard 872:Developer 838:Scrapbook 823:PowerTalk 498:Citations 461:Macintosh 357:Supported 158:Apple_MFS 112:Full name 2282:Symbolic 2211:Features 2187:Semantic 2095:eCryptfs 2039:configfs 2008:SquashFS 1896:POHMELFS 1797:OrangeFS 1622:ISO 9660 1542:UFS/UFS2 1490:Reliance 1478:ReiserFS 1324:Files-11 1218:bcachefs 1175:Disk and 1101:Software 1000:Managers 980:Keychain 975:HFS Plus 853:Stickies 843:Sherlock 769:Mac OS 9 764:Mac OS 8 758:Mac OS 7 754:System 7 749:System 6 744:System 5 734:System 1 727:Versions 679:Archived 486:See also 419:metadata 402:on 400K 365:System 1 303:resource 297:Only 2 ( 263:Features 233:of files 2400:Layouts 2386:Default 2049:debugfs 2023:UnionFS 1917:more... 1850:OpenAFS 1818:more... 1483:Reiser4 1453:OpenZFS 1344:HAMMER2 1300:ext3cow 1280:Episode 925:At Ease 894:ResEdit 884:MacsBug 790:Chooser 550:MacTech 518:MacTech 513:"Disks" 425:of the 386:) is a 128: ( 62:improve 2273:Links 2247:Extent 2177:Object 2145:Global 2063:specfs 2059:procfs 2054:kernfs 2032:Pseudo 2013:UMSDOS 1968:Davfs2 1963:cramfs 1901:Hadoop 1881:Lustre 1767:BeeGFS 1733:NILFS2 1468:QNX4FS 1431:NILFS2 1339:HAMMER 1329:Fossil 1020:OSType 985:Labels 960:Dogcow 803:Finder 641:  450:Finder 435:Finder 388:volume 202:Limits 2373:Lists 2317:Modes 2162:Flash 2133:Types 2115:SSHFS 2100:EncFS 2077:WinFS 2072:tmpfs 2067:sysfs 2044:devfs 1978:FTPFS 1973:EROFS 1911:SSHFS 1792:OCFS2 1745:UBIFS 1740:YAFFS 1728:NILFS 1723:LogFS 1718:JFFS2 1674:EROFS 1664:exFAT 1569:Xiafs 1552:WAPBL 1537:UBIFS 1448:OneFS 1426:NILFS 1421:Next3 1411:MINIX 1317:exFAT 1245:Btrfs 1213:AthFS 1193:AdvFS 910:Alias 480:macOS 400:files 352:Other 293:Forks 178:Table 134:with 47:, or 2277:Hard 2269:Fork 2150:Grid 2003:MVFS 1998:NOVA 1993:LTFS 1988:Lnfs 1983:FUSE 1953:CDfs 1943:AXFS 1938:Aufs 1876:GPFS 1861:Coda 1812:Xsan 1802:PVFS 1782:GFS2 1777:CXFS 1772:Ceph 1713:JFFS 1708:CHFS 1689:NVFS 1679:F2FS 1669:TFAT 1654:APFS 1644:and 1588:z/OS 1579:Xsan 1564:WAFL 1559:VxFS 1532:Tux3 1522:SNFS 1504:SFS 1473:ReFS 1443:NTFS 1395:MFS 1381:HTFS 1376:HPFS 1371:HFS+ 1334:GPFS 1305:ext4 1295:ext3 1290:ext2 1264:EFS 1255:CXFS 1250:CVFS 1237:z/VM 1222:BFS 1208:APFS 1188:ADFS 1025:PICT 639:ISBN 301:and 299:data 236:4094 229:Max 2120:ZFS 2105:EFS 1891:NFS 1886:NCP 1866:DFS 1856:AFP 1846:AFS 1833:NAS 1807:QFS 1684:JFS 1659:FAT 1646:SSD 1632:UDF 1617:HSF 1598:Sun 1594:ZFS 1584:zFS 1574:XFS 1500:RFS 1463:QFS 1458:PFS 1438:NSS 1391:LFS 1386:JFS 1365:MVS 1361:HFS 1351:HFS 1312:FAT 1285:ext 1260:DFS 384:MFS 231:no. 223:MiB 221:20 212:MiB 210:20 146:HFS 97:MFS 2434:: 1841:9P 1509:VM 607:. 578:. 547:. 515:. 445:. 367:— 347:No 335:No 325:No 287:1s 197:No 51:, 43:, 1852:) 1848:( 1600:) 1596:( 1590:) 1586:( 1511:) 1367:) 1363:( 1357:) 1353:( 1239:) 1135:e 1128:t 1121:v 712:e 705:t 698:v 647:. 618:. 593:. 564:. 532:. 382:( 371:, 305:) 258:” 256:: 164:) 160:( 132:) 87:) 81:( 76:) 72:( 58:. 23:.

Index

Macintosh file system (disambiguation)
list of references
related reading
external links
inline citations
improve
introducing
Learn how and when to remove this message
Developer(s)
System 1
HFS
Partition IDs
Apple Partition Map
Table
Linked list
MiB
MiB
Forks
data
resource
File system
permissions

Transparent
encryption

operating systems
System 1
Mac OS 7.6
volume
file system
Apple Computer
files
floppy disks

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