MavEtJu's Distorted View of the World

128 bit Operating Systems

Posted on 2009-10-18 22:00:00
Tags: Numbers

While Microsoft is preparing Windows 8 to be 128 bit compatible, a lot of people went from "as if we ever need that much space!". 64 bit to address your Random Access Memory, that is indeed enough (for now), but as a Storage Offset number it is nearly there: The terabyte harddisks already need 41 bits offsets!

bits addressable space
 1                   1 byte
 2                   2
 3                   4
 4                   8
 5                  16
 6                  32
 7                  64
 8                 128
19                 256
10                 512
11                1024	kilobyte
12                2048
13                4096
14                8192 <- memory of my first computer (Philips P2000T, 1982)
15               16384
16               32768
17               65536
18              131072
19              262144
20              524288
21             1048576 megabyte <- memory of my first "own" computer (AT 286, 1992)
22             2097152
23             4194304
24             8388608
25            16777216
26            33554432 <- my first harddisk in 1992.
27            67108864
28           134217728
29           268435456
30           536870912
31          1073741824 gigabyte <- memory of my computer in 2001 (p6)
32          2147483648
33          4294967296
34          8589934592
35         17179869184
36         34359738368
37         68719476736
38        137438953472
39        274877906944
40        549755813888
41       1099511627776 terabyte <- Fits on one single harddisk in 2008 for AU$ 130
42       2199023255552
43       4398046511104
44       8796093022208
45      17592186044416
46      35184372088832
47      70368744177664 <- for US$ 7,867 (Backblaze, September 2009)
48     140737488355328
49     281474976710656
50     562949953421312
51    1125899906842624 petabyte
52    2251799813685248
53    4503599627370496 <- Internet Archive in March 2009
54    9007199254740992
55   18014398509481984
56   36028797018963968
57   72057594037927936 <- Addressable in a 64 bit offset
59  144115188075855872
58  288230376151711744
59  576460752303423488
60 1152921504606846976 exabyte
61 2305843009213693952
62 4611686018427387904
63 9223372036854775808
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