???????? Hitachi Global Storage Technologies (Hitachi) ??????? ? ?????? ???????? ????? ? ????????? ????????? ????????? ???????? ?????? - 345 ???? ?? ??. ???? (???????? 53,5 ???? ?? ??. ??). ??? ????? ??? ? ??? ? ????????? ???? ????, ??? ? ??????? ??????????? ??????? ???????????. ????? ??????? ???????? ???????? ? ??????????? ?????????? ???????????????? ?????? (PMR). ???? ??? ?????????????????? ?????? ? ???????????? ????????, ??????, ??? ? 2009 ???? Hitachi ???????????? ???????????? ??????????? ?????????? ? ???????? ????????. ??? ????????, ??? 3,5-???????? ????? ??? ?????????? ?????? ????????? ?????? 2 ??; 2,5-???????? ?????????? ??? ????????? ???????? ? ??????? 400 ??; ? 1,8-???????? – 200 ??. ???? ???????? ? ????????? ??????, Hitachi ??????? ????????? 3,5-???????? ?????????? ??????? 1 ?? ? ?????? ???????? ???????? ????.

??? ???????? ????? ?????????? ???????????, ? Hitachi ???????, ??? ?????????? PMR ????? ????????????????? ?? ???? ?????????? ???????????????? ???????? (patterned media) ? ?????? ? ??????? ??????? (thermally-assisted recording). ????????? ???? ???? ?????????? ????????? ???????? ??????? ?????? ? ??????? ?????? ??? ???????? ????????? ???. ? ??????????, ????????, ? 2016 ???? ????????? ????????? 4 ???? ?? ??. ???? (620 ???? ?? ??. ??). ??? ???????? ?????????? 3,5-???????? ????????? ??????? 25 ??. ? ???????? ???????????? ??????? ????????? ???? ??????? ???????? 100 ???? ?? ??. ???? (????? 15 ?? ?? ??. ??), ??? ????????????? 0,65-?? (????????) ?????? ? ????-??????? 3,5 ?????.

?????? ???????? ??????????? ?? ???? ? ??????????? ?????? ?????????????? ??????? ????????? ????????? ???????? ???????? ? ????, ??? ??????? ?????????? ????, ???????????? ??? ???????? ??????, ?????????? ??? ?????? ? ??????. ?? ???????????? ????? ??? ??????????? ?????????, ??? ?????? ???????????? ??? ????????? ???????????. ????? ?????? ??? ????????, ???????????? ???????????? ??????????????? ???????? (patterned media) ? ?????? ? ??????? ??????? (thermally-assisted recording).

? ??? ???? ????????? ??????????, ???? ??? ????? ??????????, ?? ????????

?? ??????????? ????? ????????, ???? ??? ?????????? ???????? ???????? ? 100 ???????????????? ???????????? ? ???? ???????? - ????????? ???????. ?????????????? ??? ??????????????? ???????? ????????? ??????? ????????????? ????????, ?????? ?? ??????? ????? ????? ?????????????? ??? ?????? ?????? ???? ??????????. ????????? ????????, ??????? ???????? ????? ?????????, ???????? ????????????? ????????????.

?????? ? ??????? ??????? ????????????? ????????????? ?????????, ?????? ???????? ????????? ??? ????????? ???????????. ????? ???????? ??????????, ????? ???????? ?????????? ????? ???????? ??????? ??? ?????? ???? ?????? ??????????????? ????? ??????????????? ? ????????? ????????.

?? ?????? – ?????? ? ???? ?????????? ?? ??????? ?????? RAMAC (Random Access Method of Accounting and Control), ?????????????? 13 ???????? 1956 ???? ????????? IBM (????????????? IBM ?? ??????? ??????? ?????? ?????? ??????????? Hitachi). ????? RAMAC - 5 ??. ? ????? ? ??????????????? ?? ??? ??????? – ????????????? MP3 ? ??????? ??????, ????????? ???????? ? 20000 ??? ?????? ??????????. ????????? ?? ??????? ?????? ??????????? ?? ?????? ????????? ? .

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