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| Share on Facebook | Share on Twitter