4 Maximum File Sizes in the 64-bit File Server
6 The maximum size of a single file in a Plan 9 file server's
7 file system with 64-bit block numbers
8 is determined by the file system block size
9 (there are single, double, triple and quadruple indirect blocks).
10 The maximum size is thus
11 $d ( 6 + x + x sup 2 + x sup 3 + x sup 4 )$
13 $d = blocksize - ( 2 + 2 + 8 )$
15 $x = left floor d over 8 right floor$,
16 8 being the size in bytes of a
21 $2 sup 63 ~ = ~ 9,223,372,036,854,775,808 ~ = ~ 8$
31 blocksize max. file size in bytes
33 1k 239.455G 257,112,525,120
34 2k 7.73795T 8,507,967,771,456
35 3k 59.4174T 65,330,091,351,360
36 4k 251.779T 276,833,619,879,744
37 5k 770.93T 847,646,649,807,168
38 6k 1.87752P 2,113,900,586,253,120
39 7k 4.0645P 4,576,215,491,839,296
40 8k 7.93382P 8,932,685,435,522,880
42 9k 14.3102P 16,111,863,841,429,824
43 10k 24.2524P 27,305,748,837,688,128
44 11k 39.0823P 44,002,768,605,261,120
45 12k 60.4146P 68,020,766,726,780,736
46 13k 90.1856P 101,539,987,535,380,800
47 14k 130.683P 147,136,061,463,530,304
48 15k 184.575P 207,812,990,391,866,688
49 16k 254.939P 287,036,132,998,029,120
51 17k 345.293P 388,765,190,105,491,776
52 18k 459.621P 517,487,190,032,397,120
53 19k 602.407P 678,249,473,940,389,184
54 20k 778.66P 876,692,681,183,446,848
55 21k 993.946P 1,119,083,734,656,717,120
56 22k 1.22502E 1,412,348,826,145,348,416
57 23k 1.53012E 1,764,106,401,673,323,840
58 24k 1.89319E 2,182,700,146,852,294,464
59 25k 2.32213E 2,677,231,972,230,412,608
60 26k 2.82551E 3,257,594,998,641,165,120
61 27k 3.41264E 3,934,506,542,552,206,656
62 28k 4.09355E 4,719,541,101,414,192,960
63 29k 4.87905E 5,625,163,339,009,614,144
64 30k 5.78076E 6,664,761,070,801,627,968
65 31k 6.81111E 7,852,678,249,282,893,120
66 32k 7.98341E 9,204,247,949,324,402,496
68 33k 9.31184E 10,735,825,353,524,316,480
70 48k 60.666E 69,943,138,363,646,533,440
72 56k 131.149E 151,204,569,706,075,533,120
74 64k 255.734E 294,841,790,119,418,167,104