Knowledge (XXG)

BIOS parameter block

Source ๐Ÿ“

2055:— Figure 4.3 contains a diagram of the version 4.0 BPB and states that the layout of BPBs "is not defined by Microsoft and can vary with different vendors". At the time that the book was written, this was true. Microsoft first publicly documented the BPB structure in the OS/2 Developers' Toolkit. 65:, it describes the entire medium. A basic BPB can appear and be used on any partition, including floppy disks where its presence is often necessary; however, certain filesystems also make use of it in describing basic filesystem structures. Filesystems making use of a BIOS parameter block include 2097:— Microsoft documents a version 4.0 BPB and a new "FAT32 BIOS Parameter Block (BPB)" (a version 7.0 BPB) for DOS-Windows 98 that is "larger than a standard BPB", has an "identical structure to a standard BPB", but that also "includes several extra fields". 2031:— In the "processing the BIOS parameter block" section the authors describe the evolution of the BIOS parameter block from the MS-DOS version 2.0 BPB to the PC DOS version 4.0 BPB, and label each field with the DOS version that introduced it. 85:. Due to different types of fields and the amount of data they contain, the length of the BPB is different for FAT16, FAT32, and NTFS boot sectors. (A detailed discussion of the various FAT BPB versions and their entries can be found in the 2069:— Verstak reverse engineers the BIOS parameter block. The paper contains several errors. One such is its statement that "the presence of the EBPB in FAT32 is not documented by Microsoft". See: 2148:— The table "BPB and Extended BPB Fields on NTFS Volumes" describes BPBs on NTFS volumes. The descriptions of several fields contradict those given in the Windows 2000 Resource Kit. 2337: 1930: 2105: 2321: 2273: 2216: 2245: 2370: 89:
article.) Combined with the 11-byte data structure at the very start of volume boot records immediately preceding the BPB or EBPB, this is also called
2178: 2143: 2161: 2048: 2024: 2198: 2085: 1918: 2064: 1995: 2358: 2113: 804: 78: 2261: 2125:— Microsoft documents extended BPBs on both FAT16 and FAT32 volumes. It also documents BPBs on NTFS volumes. 1867: 2204: 2297: 2233: 2399: 1922: 2313: 2077: 1951: 51: 2186: 2135: 97:
in ECMA-107 or ISO/IEC 9293 (which describes FAT as for flexible/floppy and optical disk cartridges).
2016: 767: 2269: 1788: 54: 47: 2212: 2153: 2044: 2020: 1947: 17: 2362: 2265: 2237: 2208: 2241: 1943: 1896: 58: 2366: 2011:
Christopher, Ken W.; Feigenbaum, Barry A.; Saliga, Shon O. (1990). "9: DOS Disk Usage".
2234:"File System ID - "The alt.os.development boot sector descriptors standards committee"" 2040: 1919:"Microsoft DOS V1.1 and V2.0: /msdos/v20source/SKELIO.TXT, /msdos/v20source/HRDDRV.ASM" 43: 2394: 2388: 61:, the BPB describes the volume partition, whereas, on unpartitioned devices, such as 1910: 981: 944: 786: 631: 491: 1987: 1942:(NB. While the publishers claim this would be MS-DOS 1.1 and 2.0, it actually is 2060: 409: 291: 111: 62: 2131: 2101: 2073: 1926: 1914: 1888: 31: 1964: 2342: 2338:"I hope this is helpful about Microsoft and Caldera DR-DOS and OEM IDs" 1858: 86: 2289: 986:
Format of short DOS 7.1 Extended BIOS Parameter Block (60 bytes) for
800: 645: 505: 1233:
Format of full DOS 7.1 Extended BIOS Parameter Block (79 bytes) for
2228:— on the misuse of OEM labels and Microsoft's Volume Tracker 1863: 1234: 987: 796: 792: 641: 637: 501: 497: 419: 415: 301: 297: 117: 74: 70: 66: 2154:"The meaning and use of the OEM Name field in volume boot blocks" 1787:
exFAT does not use a BPB in the classic sense. Nevertheless, the
1528: 1522: 82: 304:(19 bytes), already supported by some versions of MS-DOS 2.11: 2035:
Townsend, Carl (1989). "4: Disk organization and management".
2007:— a description of BPBs, from version 2.0 to version 7.0 636:
Format of PC DOS 3.4 and OS/2 1.0-1.1 Extended BPB for
2140:
Microsoft Windows Server 2003 NTFS Technical Reference
2037:Advanced MS-DOS Expert Techniques for programmers 926:Volume serial number (identical to DOS 3.4 EBPB) 2110:Microsoft Windows 2000 Professional Resource Kit 2106:"Chapter 32 - Disk Concepts and Troubleshooting" 1846:Blank (traditional BPB area). Must be all zero. 791:Format of DOS 4.0 and OS/2 1.2 Extended BPB for 601:Hidden sectors (incompatible with DOS 3.0 BPB) 1893:Microsoft Windows 2000 Server Operations Guide 8: 1791:in sector 0 is organized similarly to BPBs. 583:Number of heads (identical to DOS 3.0 BPB) 50:(VBR) describing the physical layout of a 561:Physical sectors per track (identical to 1793: 1628:aka "8.0") (similar to DOS 3.4 EBPB and 1533: 1239: 992: 904:aka "4.1") (similar to DOS 3.4 EBPB and 809: 650: 510: 424: 306: 122: 27:Data structure in the volume boot record 1880: 1606:Flags etc. (identical to DOS 3.4 EBPB) 1523:NTFS ยง Partition Boot Sector (PBS) 882:Flags etc. (identical to DOS 3.4 EBPB) 2078:"Chapter 10 - Disks and File Systems" 7: 1816:JumpBoot. Must be 0xEB, 0x76, 0x90. 1584:Physical drive number (identical to 860:Physical drive number (identical to 496:Format of standard DOS 3.31 BPB for 1859:BPB formats in the FAT file systems 414:Format of standard DOS 3.2 BPB for 296:Format of standard DOS 3.0 BPB for 116:Format of standard DOS 2.0 BPB for 2173:— an issue that affects BPBs 1362:Location of FS Information Sector 1115:Location of FS Information Sector 393:Hidden sectors (incompatible with 57:. On partitioned devices, such as 25: 2082:Microsoft Windows 98 Resource Kit 2013:Developing applications using DOS 1988:"All about BIOS Parameter Blocks" 1629: 1585: 1564: 1270: 1023: 861: 840: 742: 681: 476: 475:Total sectors (incompatible with 394: 2288:Elliott, John C. (2006-04-17) . 2232:Paul, Matthias R. (2002-08-12). 2203:Paul, Matthias R. (2002-02-20). 2177:Paul, Matthias R. (2004-08-25). 2146:from the original on 2016-07-30. 2067:from the original on 2016-07-30. 1704:MFT mirror first cluster number 562: 541: 455: 337: 2373:from the original on 2022-05-29 2324:from the original on 2019-07-29 2300:from the original on 2019-04-08 2276:from the original on 2017-09-09 2248:from the original on 2022-05-29 2219:from the original on 2017-09-09 2164:from the original on 2017-09-09 2088:from the original on 2017-09-09 1998:from the original on 2017-09-09 1933:from the original on 2017-09-09 2312:Dye, Charles E. (1999-03-20). 905: 746: 1: 1380:Location of backup sector(s) 1133:Location of backup sector(s) 18:Extended BIOS Parameter Block 2152:de Boyne Pollard, Jonathan. 2059:Verstak, Alex (1998-03-10). 1986:de Boyne Pollard, Jonathan. 619:Large total logical sectors 171:Logical sectors per cluster 1527:Format of Extended BPB for 357:Physical sectors per track 2416: 2357:Kilmer, Jen (2013-05-21). 2260:Bass, Wally (1994-02-14). 1520: 1398:Reserved (Boot file name) 1151:Reserved (Boot file name) 979: 784: 629: 489: 407: 289: 109: 2205:"Need DOS 6.22 (Not OEM)" 1868:Microsoft DoubleSpace BPB 1831:"EXFAT   " 1829:Filesystem name. Must be 1686:MFT first cluster number 1624:Extended boot signature ( 1452:Extended boot signature ( 1205:Extended boot signature ( 900:Extended boot signature ( 737:Extended boot signature ( 189:Reserved logical sectors 153:Bytes per logical sector 69:(except for in DOS 1.x), 2336:Anonymous (2004-06-15). 2270:comp.os.msdos.programmer 2158:Frequently Given Answers 1992:Frequently Given Answers 1290:Logical sectors per FAT 1043:Logical sectors per FAT 279:Logical sectors per FAT 2359:"Evil :) DOS6 FAT" 1923:Computer History Museum 1344:Root directory cluster 1097:Root directory cluster 741:aka "4.0") (similar to 225:Root directory entries 95:extended FDC descriptor 1416:Physical drive number 1169:Physical drive number 701:Physical drive number 243:Total logical sectors 1952:TeleVideo PC DOS 2.11 1800:Field length (bytes) 1758:Volume serial number 1474:Volume serial number 1308:Mirroring flags etc. 1227:Volume serial number 1061:Mirroring flags etc. 38:, often shortened to 2213:alt.msdos.programmer 776:FAT12 / FAT16 / HPFS 768:Volume serial number 36:BIOS parameter block 2242:alt.os.development 1965:"exFAT Filesystem" 1789:volume boot record 1668:Sectors in volume 48:volume boot record 2061:"FAT Boot Sector" 1948:Altos MS-DOS 2.11 1946:and a mixture of 1850: 1849: 1780: 1779: 1740:Index block size 1514: 1513: 1510:File-system type 1231: 1230: 968: 967: 964:File-system type 773: 772: 623: 622: 483: 482: 401: 400: 283: 282: 261:Media descriptor 16:(Redirected from 2407: 2381: 2379: 2378: 2367:comp.os.os2.misc 2353: 2351: 2350: 2332: 2330: 2329: 2314:"FDISK problems" 2308: 2306: 2305: 2284: 2282: 2281: 2256: 2254: 2253: 2227: 2225: 2224: 2197: 2195: 2194: 2185:. Archived from 2172: 2170: 2169: 2147: 2136:"How NTFS Works" 2124: 2122: 2121: 2112:. Archived from 2096: 2094: 2093: 2068: 2054: 2030: 2006: 2004: 2003: 1973: 1972: 1961: 1955: 1941: 1939: 1938: 1907: 1901: 1900: 1885: 1840: 1832: 1823: 1810: 1794: 1770: 1765: 1752: 1747: 1734: 1729: 1722:MFT record size 1716: 1711: 1698: 1693: 1680: 1675: 1662: 1657: 1644: 1639: 1627: 1618: 1613: 1600: 1595: 1578: 1573: 1558: 1553: 1534: 1504: 1499: 1486: 1481: 1468: 1463: 1455: 1446: 1441: 1428: 1423: 1410: 1405: 1392: 1387: 1374: 1369: 1356: 1351: 1338: 1333: 1320: 1315: 1302: 1297: 1284: 1279: 1264: 1259: 1240: 1221: 1216: 1208: 1199: 1194: 1181: 1176: 1163: 1158: 1145: 1140: 1127: 1122: 1109: 1104: 1091: 1086: 1073: 1068: 1055: 1050: 1037: 1032: 1017: 1012: 993: 958: 953: 938: 933: 920: 915: 903: 894: 889: 876: 871: 854: 849: 834: 829: 810: 761: 756: 740: 731: 726: 713: 708: 695: 690: 675: 670: 651: 613: 608: 595: 590: 577: 572: 555: 550: 535: 530: 511: 469: 464: 449: 444: 425: 387: 382: 375:Number of heads 369: 364: 351: 346: 331: 326: 307: 273: 268: 255: 250: 237: 232: 219: 214: 201: 196: 183: 178: 165: 160: 147: 142: 123: 21: 2415: 2414: 2410: 2409: 2408: 2406: 2405: 2404: 2385: 2384: 2376: 2374: 2356: 2348: 2346: 2335: 2327: 2325: 2311: 2303: 2301: 2287: 2279: 2277: 2259: 2251: 2249: 2231: 2222: 2220: 2202: 2192: 2190: 2176: 2167: 2165: 2151: 2130: 2119: 2117: 2100: 2091: 2089: 2072: 2058: 2051: 2034: 2027: 2010: 2001: 1999: 1985: 1982: 1980:Further reading 1977: 1976: 1963: 1962: 1958: 1944:SCP MS-DOS 1.25 1936: 1934: 1917:(2013-12-19) . 1909: 1908: 1904: 1897:Microsoft Press 1887: 1886: 1882: 1877: 1855: 1838: 1830: 1821: 1808: 1785: 1768: 1763: 1750: 1745: 1732: 1727: 1714: 1709: 1696: 1691: 1678: 1673: 1660: 1655: 1642: 1637: 1625: 1616: 1611: 1598: 1593: 1576: 1571: 1556: 1551: 1525: 1519: 1502: 1497: 1484: 1479: 1466: 1461: 1453: 1444: 1439: 1426: 1421: 1408: 1403: 1390: 1385: 1372: 1367: 1354: 1349: 1336: 1331: 1318: 1313: 1300: 1295: 1282: 1277: 1262: 1257: 1219: 1214: 1206: 1197: 1192: 1179: 1174: 1161: 1156: 1143: 1138: 1125: 1120: 1107: 1102: 1089: 1084: 1071: 1066: 1053: 1048: 1035: 1030: 1015: 1010: 984: 978: 973: 956: 951: 936: 931: 918: 913: 901: 892: 887: 874: 869: 852: 847: 832: 827: 789: 783: 778: 759: 754: 738: 729: 724: 711: 706: 693: 688: 673: 668: 634: 628: 611: 606: 593: 588: 575: 570: 553: 548: 533: 528: 494: 488: 467: 462: 447: 442: 412: 406: 385: 380: 367: 362: 349: 344: 329: 324: 294: 288: 271: 266: 253: 248: 235: 230: 217: 212: 207:Number of FATs 199: 194: 181: 176: 163: 158: 145: 140: 114: 108: 103: 28: 23: 22: 15: 12: 11: 5: 2413: 2411: 2403: 2402: 2400:DOS technology 2397: 2387: 2386: 2383: 2382: 2354: 2333: 2309: 2285: 2262:"Cluster Size" 2257: 2229: 2200: 2179:"NOVOLTRK.REG" 2174: 2149: 2128: 2127: 2126: 2098: 2056: 2049: 2041:Howard M. Sams 2032: 2025: 2008: 1981: 1978: 1975: 1974: 1956: 1902: 1879: 1878: 1876: 1873: 1872: 1871: 1861: 1854: 1851: 1848: 1847: 1844: 1841: 1835: 1834: 1827: 1824: 1818: 1817: 1814: 1811: 1805: 1804: 1801: 1798: 1797:Sector offset 1784: 1781: 1778: 1777: 1774: 1771: 1766: 1760: 1759: 1756: 1753: 1748: 1742: 1741: 1738: 1735: 1730: 1724: 1723: 1720: 1717: 1712: 1706: 1705: 1702: 1699: 1694: 1688: 1687: 1684: 1681: 1676: 1670: 1669: 1666: 1663: 1658: 1652: 1651: 1648: 1645: 1640: 1634: 1633: 1622: 1619: 1614: 1608: 1607: 1604: 1601: 1596: 1590: 1589: 1582: 1579: 1574: 1568: 1567: 1562: 1559: 1554: 1548: 1547: 1544: 1541: 1538: 1537:Sector offset 1521:Main article: 1518: 1515: 1512: 1511: 1508: 1505: 1500: 1494: 1493: 1490: 1487: 1482: 1476: 1475: 1472: 1469: 1464: 1458: 1457: 1450: 1447: 1442: 1436: 1435: 1432: 1429: 1424: 1418: 1417: 1414: 1411: 1406: 1400: 1399: 1396: 1393: 1388: 1382: 1381: 1378: 1375: 1370: 1364: 1363: 1360: 1357: 1352: 1346: 1345: 1342: 1339: 1334: 1328: 1327: 1324: 1321: 1316: 1310: 1309: 1306: 1303: 1298: 1292: 1291: 1288: 1285: 1280: 1274: 1273: 1268: 1265: 1260: 1254: 1253: 1250: 1247: 1244: 1243:Sector offset 1229: 1228: 1225: 1222: 1217: 1211: 1210: 1203: 1200: 1195: 1189: 1188: 1185: 1182: 1177: 1171: 1170: 1167: 1164: 1159: 1153: 1152: 1149: 1146: 1141: 1135: 1134: 1131: 1128: 1123: 1117: 1116: 1113: 1110: 1105: 1099: 1098: 1095: 1092: 1087: 1081: 1080: 1077: 1074: 1069: 1063: 1062: 1059: 1056: 1051: 1045: 1044: 1041: 1038: 1033: 1027: 1026: 1021: 1018: 1013: 1007: 1006: 1003: 1000: 997: 996:Sector offset 980:Main article: 977: 974: 972: 969: 966: 965: 962: 959: 954: 948: 947: 942: 939: 934: 928: 927: 924: 921: 916: 910: 909: 898: 895: 890: 884: 883: 880: 877: 872: 866: 865: 858: 855: 850: 844: 843: 838: 835: 830: 824: 823: 820: 817: 814: 813:Sector offset 785:Main article: 782: 779: 777: 774: 771: 770: 765: 762: 757: 751: 750: 735: 732: 727: 721: 720: 717: 714: 709: 703: 702: 699: 696: 691: 685: 684: 679: 676: 671: 665: 664: 661: 658: 655: 654:Sector offset 630:Main article: 627: 624: 621: 620: 617: 614: 609: 603: 602: 599: 596: 591: 585: 584: 581: 578: 573: 567: 566: 559: 556: 551: 545: 544: 539: 536: 531: 525: 524: 521: 518: 515: 514:Sector offset 490:Main article: 487: 484: 481: 480: 473: 470: 465: 459: 458: 453: 450: 445: 439: 438: 435: 432: 429: 428:Sector offset 408:Main article: 405: 402: 399: 398: 391: 388: 383: 377: 376: 373: 370: 365: 359: 358: 355: 352: 347: 341: 340: 335: 332: 327: 321: 320: 317: 314: 311: 310:Sector offset 290:Main article: 287: 284: 281: 280: 277: 274: 269: 263: 262: 259: 256: 251: 245: 244: 241: 238: 233: 227: 226: 223: 220: 215: 209: 208: 205: 202: 197: 191: 190: 187: 184: 179: 173: 172: 169: 166: 161: 155: 154: 151: 148: 143: 137: 136: 133: 130: 127: 126:Sector offset 110:Main article: 107: 104: 102: 99: 91:FDC descriptor 44:data structure 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 2412: 2401: 2398: 2396: 2393: 2392: 2390: 2372: 2368: 2364: 2360: 2355: 2345: 2344: 2339: 2334: 2323: 2319: 2315: 2310: 2299: 2295: 2291: 2286: 2275: 2271: 2267: 2263: 2258: 2247: 2243: 2239: 2235: 2230: 2218: 2214: 2210: 2206: 2201: 2199: 2189:on 2016-03-04 2188: 2184: 2183:www.drdos.org 2180: 2175: 2163: 2159: 2155: 2150: 2145: 2141: 2137: 2133: 2129: 2116:on 2006-08-10 2115: 2111: 2107: 2103: 2099: 2087: 2083: 2079: 2075: 2071: 2070: 2066: 2062: 2057: 2052: 2050:0-672-22667-7 2046: 2042: 2038: 2033: 2028: 2026:0-471-52231-7 2022: 2018: 2014: 2009: 1997: 1993: 1989: 1984: 1983: 1979: 1970: 1966: 1960: 1957: 1953: 1949: 1945: 1932: 1928: 1924: 1920: 1916: 1912: 1911:Paterson, Tim 1906: 1903: 1898: 1894: 1890: 1884: 1881: 1874: 1869: 1865: 1862: 1860: 1857: 1856: 1852: 1845: 1842: 1837: 1836: 1828: 1825: 1820: 1819: 1815: 1812: 1807: 1806: 1802: 1799: 1796: 1795: 1792: 1790: 1782: 1775: 1772: 1767: 1762: 1761: 1757: 1754: 1749: 1744: 1743: 1739: 1736: 1731: 1726: 1725: 1721: 1718: 1713: 1708: 1707: 1703: 1700: 1695: 1690: 1689: 1685: 1682: 1677: 1672: 1671: 1667: 1664: 1659: 1654: 1653: 1649: 1646: 1641: 1636: 1635: 1631: 1623: 1620: 1615: 1610: 1609: 1605: 1602: 1597: 1592: 1591: 1587: 1583: 1580: 1575: 1570: 1569: 1566: 1563: 1560: 1555: 1550: 1549: 1545: 1543:Field length 1542: 1539: 1536: 1535: 1532: 1530: 1524: 1516: 1509: 1506: 1501: 1496: 1495: 1492:Volume label 1491: 1488: 1483: 1478: 1477: 1473: 1470: 1465: 1460: 1459: 1451: 1448: 1443: 1438: 1437: 1433: 1430: 1425: 1420: 1419: 1415: 1412: 1407: 1402: 1401: 1397: 1394: 1389: 1384: 1383: 1379: 1376: 1371: 1366: 1365: 1361: 1358: 1353: 1348: 1347: 1343: 1340: 1335: 1330: 1329: 1325: 1322: 1317: 1312: 1311: 1307: 1304: 1299: 1294: 1293: 1289: 1286: 1281: 1276: 1275: 1272: 1269: 1266: 1261: 1256: 1255: 1251: 1249:Field length 1248: 1245: 1242: 1241: 1238: 1236: 1226: 1223: 1218: 1213: 1212: 1204: 1201: 1196: 1191: 1190: 1186: 1183: 1178: 1173: 1172: 1168: 1165: 1160: 1155: 1154: 1150: 1147: 1142: 1137: 1136: 1132: 1129: 1124: 1119: 1118: 1114: 1111: 1106: 1101: 1100: 1096: 1093: 1088: 1083: 1082: 1078: 1075: 1070: 1065: 1064: 1060: 1057: 1052: 1047: 1046: 1042: 1039: 1034: 1029: 1028: 1025: 1022: 1019: 1014: 1009: 1008: 1004: 1002:Field length 1001: 998: 995: 994: 991: 989: 983: 975: 970: 963: 960: 955: 950: 949: 946: 943: 940: 935: 930: 929: 925: 922: 917: 912: 911: 907: 899: 896: 891: 886: 885: 881: 878: 873: 868: 867: 863: 859: 856: 851: 846: 845: 842: 839: 836: 831: 826: 825: 821: 819:Field length 818: 815: 812: 811: 808: 806: 802: 798: 794: 788: 780: 775: 769: 766: 763: 758: 753: 752: 748: 744: 736: 733: 728: 723: 722: 718: 715: 710: 705: 704: 700: 697: 692: 687: 686: 683: 680: 677: 672: 667: 666: 662: 660:Field length 659: 656: 653: 652: 649: 647: 643: 639: 633: 625: 618: 615: 610: 605: 604: 600: 597: 592: 587: 586: 582: 579: 574: 569: 568: 564: 560: 557: 552: 547: 546: 543: 540: 537: 532: 527: 526: 522: 520:Field length 519: 516: 513: 512: 509: 507: 503: 499: 493: 485: 478: 474: 471: 466: 461: 460: 457: 454: 451: 446: 441: 440: 436: 434:Field length 433: 430: 427: 426: 423: 421: 417: 411: 403: 396: 392: 389: 384: 379: 378: 374: 371: 366: 361: 360: 356: 353: 348: 343: 342: 339: 336: 333: 328: 323: 322: 318: 316:Field length 315: 312: 309: 308: 305: 303: 299: 293: 285: 278: 275: 270: 265: 264: 260: 257: 252: 247: 246: 242: 239: 234: 229: 228: 224: 221: 216: 211: 210: 206: 203: 198: 193: 192: 188: 185: 180: 175: 174: 170: 167: 162: 157: 156: 152: 149: 144: 139: 138: 134: 132:Field length 131: 128: 125: 124: 121: 119: 113: 105: 101:FAT12 / FAT16 100: 98: 96: 92: 88: 84: 80: 76: 72: 68: 64: 60: 56: 53: 49: 45: 41: 37: 33: 19: 2375:. Retrieved 2347:. Retrieved 2341: 2326:. Retrieved 2317: 2302:. Retrieved 2293: 2290:"On OEM IDs" 2278:. Retrieved 2250:. Retrieved 2221:. Retrieved 2191:. Retrieved 2187:the original 2182: 2166:. Retrieved 2157: 2139: 2118:. Retrieved 2114:the original 2109: 2090:. Retrieved 2081: 2036: 2012: 2000:. Retrieved 1991: 1969:elm-chan.org 1968: 1959: 1935:. Retrieved 1905: 1892: 1883: 1803:Description 1786: 1630:DOS 4.0 EBPB 1586:DOS 3.4 EBPB 1565:DOS 3.31 BPB 1546:Description 1531:(73 bytes): 1526: 1271:DOS 3.31 BPB 1252:Description 1232: 1024:DOS 3.31 BPB 1005:Description 985: 982:DOS 7.1 EBPB 976:DOS 7.1 EBPB 945:Volume label 862:DOS 3.4 EBPB 841:DOS 3.31 BPB 822:Description 807:(51 bytes): 790: 787:DOS 4.0 EBPB 781:DOS 4.0 EBPB 743:DOS 4.0 EBPB 682:DOS 3.31 BPB 663:Description 648:(32 bytes): 635: 632:DOS 3.4 EBPB 626:DOS 3.4 EBPB 523:Description 508:(25 bytes): 495: 492:DOS 3.31 BPB 486:DOS 3.31 BPB 477:DOS 3.31 BPB 437:Description 422:(21 bytes): 413: 395:DOS 3.31 BPB 319:Description 295: 135:Description 120:(13 bytes): 115: 94: 90: 63:floppy disks 52:data storage 39: 35: 29: 2318:delorie.com 2294:Seasip.info 1540:BPB offset 1434:Flags etc. 1246:BPB offset 1187:Flags etc. 999:BPB offset 816:BPB offset 719:Flags etc. 657:BPB offset 563:DOS 3.0 BPB 542:DOS 2.0 BPB 517:BPB offset 456:DOS 3.0 BPB 431:BPB offset 410:DOS 3.2 BPB 404:DOS 3.2 BPB 338:DOS 2.0 BPB 313:BPB offset 292:DOS 3.0 BPB 286:DOS 3.0 BPB 129:BPB offset 112:DOS 2.0 BPB 106:DOS 2.0 BPB 2389:Categories 2377:2019-07-29 2349:2019-07-29 2328:2019-07-29 2304:2019-07-29 2280:2006-10-14 2252:2019-07-29 2223:2006-10-14 2193:2011-12-17 2168:2016-06-04 2120:2006-06-01 2092:2017-09-09 2002:2016-04-18 1937:2014-03-25 1875:References 59:hard disks 2363:Newsgroup 2266:Newsgroup 2238:Newsgroup 2209:Newsgroup 2132:Microsoft 2102:Microsoft 2074:Microsoft 1927:Microsoft 1915:Microsoft 1889:Microsoft 1783:exFAT BPB 1776:Checksum 1650:Reserved 906:NTFS EBPB 747:NTFS EBPB 32:computing 2371:Archived 2322:Archived 2298:Archived 2274:Archived 2246:Archived 2217:Archived 2162:Archived 2144:Archived 2086:Archived 2065:Archived 1996:Archived 1931:Archived 1853:See also 1561:25 BYTEs 1489:11 BYTEs 1395:12 BYTEs 1326:Version 1267:25 BYTEs 1148:12 BYTEs 1079:Version 1020:25 BYTEs 941:11 BYTEs 837:25 BYTEs 678:25 BYTEs 538:13 BYTEs 452:19 BYTEs 334:13 BYTEs 2365::  2343:Groklaw 2296:. 1.3. 2268::  2240::  2211::  1507:8 BYTEs 961:8 BYTEs 46:in the 42:, is a 2047:  2023:  801:FAT16B 646:FAT16B 506:FAT16B 81:, and 55:volume 34:, the 2017:Wiley 1864:MDBPB 1839:0x00B 1822:0x003 1809:0x000 1773:DWORD 1764:0x050 1755:QWORD 1746:0x048 1737:DWORD 1728:0x044 1719:DWORD 1710:0x040 1701:QWORD 1692:0x038 1683:QWORD 1674:0x030 1665:QWORD 1656:0x028 1638:0x027 1612:0x026 1594:0x025 1572:0x024 1552:0x00B 1498:0x052 1480:0x047 1471:DWORD 1462:0x043 1440:0x042 1422:0x041 1404:0x040 1386:0x034 1368:0x032 1350:0x030 1341:DWORD 1332:0x02C 1314:0x02A 1296:0x028 1287:DWORD 1278:0x024 1258:0x00B 1235:FAT32 1224:DWORD 1215:0x043 1193:0x042 1175:0x041 1157:0x040 1139:0x034 1121:0x032 1103:0x030 1094:DWORD 1085:0x02C 1067:0x02A 1049:0x028 1040:DWORD 1031:0x024 1011:0x00B 988:FAT32 971:FAT32 952:0x036 932:0x02B 923:DWORD 914:0x027 888:0x026 870:0x025 848:0x024 828:0x00B 797:FAT16 793:FAT12 764:DWORD 755:0x027 725:0x026 707:0x025 689:0x024 669:0x00B 642:FAT16 638:FAT12 616:DWORD 607:0x020 598:DWORD 589:0x01C 571:0x01A 549:0x018 529:0x00B 502:FAT16 498:FAT12 463:0x01E 443:0x00B 420:FAT16 416:FAT12 381:0x01C 363:0x01A 345:0x018 325:0x00B 302:FAT16 298:FAT12 267:0x016 249:0x015 231:0x013 213:0x011 195:0x010 177:0x00E 159:0x00D 141:0x00B 118:FAT12 75:FAT32 71:FAT16 67:FAT12 2395:BIOS 2045:ISBN 2021:ISBN 1950:and 1769:0x45 1751:0x3D 1733:0x39 1715:0x35 1697:0x2D 1679:0x25 1661:0x1D 1647:BYTE 1643:0x1C 1626:0x80 1621:BYTE 1617:0x1B 1603:BYTE 1599:0x1A 1581:BYTE 1577:0x19 1557:0x00 1529:NTFS 1517:NTFS 1503:0x47 1485:0x3C 1467:0x38 1454:0x29 1449:BYTE 1445:0x37 1431:BYTE 1427:0x36 1413:BYTE 1409:0x35 1391:0x29 1377:WORD 1373:0x27 1359:WORD 1355:0x25 1337:0x21 1323:WORD 1319:0x1F 1305:WORD 1301:0x1D 1283:0x19 1263:0x00 1220:0x38 1207:0x28 1202:BYTE 1198:0x37 1184:BYTE 1180:0x36 1166:BYTE 1162:0x35 1144:0x29 1130:WORD 1126:0x27 1112:WORD 1108:0x25 1090:0x21 1076:WORD 1072:0x1F 1058:WORD 1054:0x1D 1036:0x19 1016:0x00 957:0x2B 937:0x20 919:0x1C 902:0x29 897:BYTE 893:0x1B 879:BYTE 875:0x1A 857:BYTE 853:0x19 833:0x00 805:HPFS 803:and 760:0x1C 745:and 739:0x28 734:BYTE 730:0x1B 716:BYTE 712:0x1A 698:BYTE 694:0x19 674:0x00 644:and 612:0x15 594:0x11 580:WORD 576:0x0F 558:WORD 554:0x0D 534:0x00 504:and 472:WORD 468:0x13 448:0x00 418:and 390:WORD 386:0x11 372:WORD 368:0x0F 354:WORD 350:0x0D 330:0x00 300:and 276:WORD 272:0x0B 258:BYTE 254:0x0A 240:WORD 236:0x08 222:WORD 218:0x06 204:BYTE 200:0x05 186:WORD 182:0x03 168:BYTE 164:0x02 150:WORD 146:0x00 83:NTFS 79:HPFS 93:or 87:FAT 40:BPB 30:In 2391:: 2369:. 2361:. 2340:. 2320:. 2316:. 2292:. 2272:. 2264:. 2244:. 2236:. 2215:. 2207:. 2181:. 2160:. 2156:. 2142:. 2138:. 2134:. 2108:. 2104:. 2084:. 2080:. 2076:. 2063:. 2043:. 2039:. 2019:. 2015:. 1994:. 1990:. 1967:. 1954:.) 1929:. 1925:, 1921:. 1913:; 1895:. 1891:. 1843:53 1833:. 1632:) 1588:) 1456:) 1237:: 1209:) 990:: 908:) 864:) 799:, 795:, 749:) 640:, 565:) 500:, 479:) 397:) 77:, 73:, 2380:. 2352:. 2331:. 2307:. 2283:. 2255:. 2226:. 2196:. 2171:. 2123:. 2095:. 2053:. 2029:. 2005:. 1971:. 1940:. 1899:. 1870:) 1866:( 1826:8 1813:3 20:)

Index

Extended BIOS Parameter Block
computing
data structure
volume boot record
data storage
volume
hard disks
floppy disks
FAT12
FAT16
FAT32
HPFS
NTFS
FAT
DOS 2.0 BPB
FAT12
DOS 3.0 BPB
FAT12
FAT16
DOS 2.0 BPB
DOS 3.31 BPB
DOS 3.2 BPB
FAT12
FAT16
DOS 3.0 BPB
DOS 3.31 BPB
DOS 3.31 BPB
FAT12
FAT16
FAT16B

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