{"id":54526,"date":"2024-09-12T01:56:19","date_gmt":"2024-09-12T08:56:19","guid":{"rendered":"https:drivesaversdatarecovery.com\/\/?p=54526"},"modified":"2024-10-03T10:27:57","modified_gmt":"2024-10-03T17:27:57","slug":"what-is-computer-memory","status":"publish","type":"post","link":"https:\/\/drivesaversdatarecovery.com\/fi\/blog\/what-is-computer-memory\/","title":{"rendered":"Mit\u00e4 on tietokoneen muisti?"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><div class=\"vc_row wpb_row vc_row-fluid vc_row-o-content-middle vc_row-flex wpex-relative add-overlay-header-offset\"><div class=\"overlay-header-offset-div wpex-w-100\"  style=\"height:var(--wpex-site-header-height, 100px);\"><\/div><div class=\"wpb_column vc_column_container vc_col-sm-3\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><figure class=\"vcex-image vcex-module\"><div class=\"vcex-image-inner wpex-relative wpex-inline-block\"><img width=\"800\" height=\"800\" src=\"https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2022\/09\/Clean_Room_Guide.png\" class=\"vcex-image-img wpex-align-middle\" alt=\"\" decoding=\"async\" srcset=\"https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2022\/09\/Clean_Room_Guide.png 800w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2022\/09\/Clean_Room_Guide-300x300.png 300w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2022\/09\/Clean_Room_Guide-150x150.png 150w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2022\/09\/Clean_Room_Guide-768x768.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/div><\/figure><\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-9\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Tietokoneen muisti on tallennustila tiedoille ja k\u00e4skyille, joita tietokoneesi tarvitsee toimiakseen nopeasti. Se on kuin n\u00e4pp\u00e4r\u00e4 avustaja, joka auttaa CPU:ta (keskusyksikk\u00f6 \u2013 tietokoneesi aivot) hakemaan ja k\u00e4sittelem\u00e4\u00e4n tietoa nopeasti, varmistaen, ett\u00e4 kaikki sujuu joustavasti. Ilman muistia tietokoneesi olisi eksyksiss\u00e4 ja sekaisin \u2014 se ei tiet\u00e4isi, mihin tiedot tallentaa tai mist\u00e4 ne l\u00f6yt\u00e4\u00e4 tarpeidensa t\u00e4ytt\u00e4miseksi. Ajattele sit\u00e4 paikkana, jossa k\u00e4ytt\u00f6j\u00e4rjestelm\u00e4, laitteisto ja ohjelmistot voivat kohdata ja p\u00e4\u00e4st\u00e4 helposti k\u00e4ytt\u00e4m\u00e4\u00e4n tarvitsemiaan tietoja.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid wpex-relative\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><h2 class=\"vcex-heading vcex-heading-plain vcex-module wpex-heading wpex-text-2xl wpex-h2\"><span class=\"vcex-heading-inner wpex-inline-block\">Mit\u00e4 eri tietokonemuistin tyyppej\u00e4 on?<\/span><\/h2>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Tietokoneissa on kahta tyyppi\u00e4 muistia: ensisijainen ja toissijainen. Ne hoitavat hyvin erilaisia teht\u00e4vi\u00e4 ja tukevat laitetta omalla tavallaan. T\u00e4ss\u00e4 on yksinkertainen vertaus, joka auttaa ymm\u00e4rt\u00e4m\u00e4\u00e4n eron:<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vc_empty_space\"   style=\"height: 32px\"><span class=\"vc_empty_space_inner\"><\/span><\/div><div class=\"vc_row wpb_row vc_inner vc_row-fluid wpex-relative\"><div class=\"wpb_column vc_column_container vc_col-sm-6\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p class=\"translation-block\"><strong>Ensisijainen tietokoneen muisti (RAM ja ROM):<\/strong> Ajattele tietokoneen muistia kuin rivin\u00e4 lokeroita p\u00e4iv\u00e4kodissa. Kun lapset saapuvat, he t\u00e4ytt\u00e4v\u00e4t lokeronsa takeilla, repuilla ja ev\u00e4ill\u00e4 \u2013 kaikella, mit\u00e4 he tarvitsevat p\u00e4iv\u00e4n aikana. P\u00e4iv\u00e4n p\u00e4\u00e4tteeksi heid\u00e4n (pit\u00e4isi) tyhjent\u00e4\u00e4 lokeronsa ja vied\u00e4 tavarat kotiin, jolloin lokerot j\u00e4\u00e4v\u00e4t taas tyhjiksi. N\u00e4in toimii ensisijainen muisti. Tietoa s\u00e4ilytet\u00e4\u00e4n vain niin kauan kuin sit\u00e4 tarvitaan, ja se poistetaan, kun laite ei ole en\u00e4\u00e4 k\u00e4yt\u00f6ss\u00e4.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-6\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p class=\"translation-block\"><strong>Toissijainen tietokoneen muisti:<\/strong> Toisaalta jokaisen vuoden alussa opettaja merkitsee jokaisen lokeron oppilaan nimell\u00e4. T\u00e4m\u00e4 vastaa toissijaista muistia tietokoneessa. N\u00e4m\u00e4 nimilaput pysyv\u00e4t paikoillaan koko vuoden tai kunnes opettaja p\u00e4\u00e4tt\u00e4\u00e4 muuttaa ne manuaalisesti \u2013 aivan kuten toissijaisessa muistissa olevat tiedot s\u00e4ilyv\u00e4t, kunnes k\u00e4ytt\u00e4j\u00e4 itse p\u00e4\u00e4tt\u00e4\u00e4 poistaa tai muokata ne.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>T\u00e4m\u00e4 on my\u00f6nnetysti yksinkertaistettu selitys ensisijaisesta ja toissijaisesta muistista, mutta ajatus k\u00e4y ilmi. Nyt voimme tarkastella yksityiskohtaisemmin eri muistityyppej\u00e4 tietokoneessa.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vcex-spacing wpex-w-100 wpex-clear\" style=\"height:20px;\"><\/div><\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid wpex-relative\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><style>.vcex-image.vcex_69e5ec1ddfcfb .vcex-image-img{border-radius:var(--wpex-rounded);}<\/style><figure class=\"vcex-image vcex-module vcex_69e5ec1ddfcfb\"><div class=\"vcex-image-inner wpex-relative wpex-inline-block\"><img width=\"2000\" height=\"1045\" src=\"https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/What-is-Computer-Memory-WD1.jpg\" class=\"vcex-image-img wpex-align-middle\" alt=\"\" decoding=\"async\" srcset=\"https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/What-is-Computer-Memory-WD1.jpg 2000w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/What-is-Computer-Memory-WD1-300x157.jpg 300w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/What-is-Computer-Memory-WD1-1024x535.jpg 1024w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/What-is-Computer-Memory-WD1-768x401.jpg 768w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/What-is-Computer-Memory-WD1-1536x803.jpg 1536w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/What-is-Computer-Memory-WD1-1024x535@2x.jpg 2048w\" sizes=\"(max-width: 2000px) 100vw, 2000px\" \/><\/div><\/figure><\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid wpex-relative\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><h2 class=\"vcex-heading vcex-heading-plain vcex-module wpex-heading wpex-text-2xl wpex-h2\"><span class=\"vcex-heading-inner wpex-inline-block\">Ensisijainen tietokoneen muisti<\/span><\/h2>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>T\u00e4m\u00e4 muistityyppi sijaitsee l\u00e4hell\u00e4 suoritinta emolevyll\u00e4. L\u00e4heisyytens\u00e4 ansiosta suoritin voi lukea ensisijaista muistia nopeasti. Tietoja tallennetaan siihen v\u00e4lit\u00f6nt\u00e4 k\u00e4ytt\u00f6\u00e4 varten, tyypillisesti yhden k\u00e4ytt\u00f6kerran ajaksi.<\/p>\n<h4>Tietokoneen ensisijainen muisti jakautuu kahteen p\u00e4\u00e4tyyppiin: RAM ja ROM.<\/h4>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vcex-spacing wpex-w-100 wpex-clear\" style=\"height:20px;\"><\/div><\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid vc_row-o-equal-height vc_row-o-content-middle vc_row-flex wpex-vc-full-width-row wpex-vc-full-width-row--no-padding wpex-relative tablet-fullwidth-columns\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"vc_separator wpb_content_element vc_separator_align_center vc_sep_width_100 vc_sep_border_width_10 vc_sep_pos_align_center vc_separator_no_text vc_sep_color_grey wpb_content_element  wpb_content_element\" ><span class=\"vc_sep_holder vc_sep_holder_l\"><span class=\"vc_sep_line\"><\/span><\/span><span class=\"vc_sep_holder vc_sep_holder_r\"><span class=\"vc_sep_line\"><\/span><\/span>\n<\/div><\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid wpex-relative\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"vcex-spacing wpex-w-100 wpex-clear\" style=\"height:20px;\"><\/div><div class=\"vc_row wpb_row vc_inner vc_row-fluid vc_row-o-content-middle vc_row-flex wpex-relative\"><div class=\"wpb_column vc_column_container vc_col-sm-4\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><figure class=\"vcex-image vcex-module\"><div class=\"vcex-image-inner wpex-relative wpex-inline-block\"><img width=\"1004\" height=\"1026\" src=\"https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/ram_trans.png\" class=\"vcex-image-img wpex-align-middle\" alt=\"\" decoding=\"async\" srcset=\"https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/ram_trans.png 1004w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/ram_trans-294x300.png 294w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/ram_trans-1002x1024.png 1002w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/ram_trans-768x785.png 768w\" sizes=\"(max-width: 1004px) 100vw, 1004px\" \/><\/div><\/figure><\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-8\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><h3 class=\"vcex-heading vcex-heading-plain vcex-module wpex-heading wpex-text-2xl wpex-h3\"><span class=\"vcex-heading-inner wpex-inline-block\">RAM (satunnaisk\u00e4ytt\u00f6muisti)<\/span><\/h3>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Useimmat ihmiset tuntevat RAM-muistin tietokoneen muistina, joka vaikuttaa eniten suoritusnopeuteen. RAM (Random Access Memory) on eritt\u00e4in nopea muisti. Mit\u00e4 enemm\u00e4n RAM-muistia sinulla on, sit\u00e4 nopeammin j\u00e4rjestelm\u00e4 toimii. RAM on haihtuvaa muistia, mik\u00e4 tarkoittaa, ett\u00e4 kaikki siihen tallennettu tieto katoaa heti, kun tietokone menett\u00e4\u00e4 virran.<\/p>\n<h4>RAM-muistia on kahta tyyppi\u00e4:<\/h4>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div><div class=\"vc_empty_space\"   style=\"height: 32px\"><span class=\"vc_empty_space_inner\"><\/span><\/div><div class=\"vc_row wpb_row vc_inner vc_row-fluid wpex-relative\"><div class=\"wpb_column vc_column_container vc_col-sm-6\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p class=\"translation-block\"><strong>DRAM:<\/strong> T\u00e4t\u00e4 RAM-tyyppi\u00e4 kutsutaan dynaamiseksi muistiksi (DRAM), ja se on yleisin tietokoneissa k\u00e4ytetty muistityyppi. DRAM on kahdesta RAM-tyypist\u00e4 hitaampi ja yleens\u00e4 my\u00f6s edullisempi.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-6\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p class=\"translation-block\"><strong>SRAM:<\/strong> T\u00e4t\u00e4 RAM-tyyppi\u00e4 kutsutaan staattiseksi muistiksi (SRAM). SRAM on kaksi tai kolme kertaa nopeampi kuin DRAM, mutta se on my\u00f6s suurempi ja yleens\u00e4 kalliimpi.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid vc_row-o-equal-height vc_row-o-content-middle vc_row-flex wpex-vc-full-width-row wpex-vc-full-width-row--no-padding wpex-relative tablet-fullwidth-columns\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"vc_separator wpb_content_element vc_separator_align_center vc_sep_width_100 vc_sep_border_width_10 vc_sep_pos_align_center vc_separator_no_text vc_sep_color_grey wpb_content_element  wpb_content_element\" ><span class=\"vc_sep_holder vc_sep_holder_l\"><span class=\"vc_sep_line\"><\/span><\/span><span class=\"vc_sep_holder vc_sep_holder_r\"><span class=\"vc_sep_line\"><\/span><\/span>\n<\/div><\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid wpex-relative\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"vc_empty_space\"   style=\"height: 32px\"><span class=\"vc_empty_space_inner\"><\/span><\/div><div class=\"vc_row wpb_row vc_inner vc_row-fluid vc_row-o-content-middle vc_row-flex wpex-relative\"><div class=\"wpb_column vc_column_container vc_col-sm-4\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><figure class=\"vcex-image vcex-module\"><div class=\"vcex-image-inner wpex-relative wpex-inline-block\"><img width=\"1004\" height=\"1026\" src=\"https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/rom_trans.png\" class=\"vcex-image-img wpex-align-middle\" alt=\"\" decoding=\"async\" srcset=\"https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/rom_trans.png 1004w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/rom_trans-294x300.png 294w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/rom_trans-1002x1024.png 1002w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/09\/rom_trans-768x785.png 768w\" sizes=\"(max-width: 1004px) 100vw, 1004px\" \/><\/div><\/figure><\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-8\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><h3 class=\"vcex-heading vcex-heading-plain vcex-module wpex-heading wpex-text-2xl wpex-h3\"><span class=\"vcex-heading-inner wpex-inline-block\">ROM (vain luku -muisti)<\/span><\/h3>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>ROM on toinen ensisijaisen muistin tyyppi tietokoneessa, ja sen nimi tulee sanoista Read-Only Memory. Nimens\u00e4 mukaisesti t\u00e4m\u00e4 muistityyppi voi vain lukea tietoa, ei kirjoittaa sit\u00e4. ROM on nopea ei-haihtuvan muistin muoto, mik\u00e4 tarkoittaa, ett\u00e4 sen tallentama tieto s\u00e4ilyy pysyv\u00e4sti, vaikka tietokone sammutetaan. T\u00e4m\u00e4 johtuu siit\u00e4, ett\u00e4 ROM ei tarvitse s\u00e4hk\u00f6virtaa tallennukseen, vaan kirjoittaa tietoa yksitt\u00e4isiin soluihin bin\u00e4\u00e4rikoodin avulla.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>ROM-muistia k\u00e4ytet\u00e4\u00e4n usein pysyvien tiedostojen, kuten BIOSin ja k\u00e4ytt\u00f6j\u00e4rjestelm\u00e4n, tallentamiseen sek\u00e4 j\u00e4rjestelm\u00e4n k\u00e4ynnist\u00e4miseen tarvittavien ohjeiden, eli k\u00e4ynnistysprosessin (bootstrap), s\u00e4ilytt\u00e4miseen. Sit\u00e4 hy\u00f6dynnet\u00e4\u00e4n my\u00f6s sulautetuissa j\u00e4rjestelmiss\u00e4, joita esiintyy kodinkoneissa, l\u00e4\u00e4ketieteellisiss\u00e4 laitteissa ja ajoneuvoelektroniikassa, joissa ohjelmiston luotettavuus on olennaista. Vaikka ROM on ei-haihtuvaa muistia, sit\u00e4 pidet\u00e4\u00e4n ensisijaisena muistina, koska prosessori k\u00e4ytt\u00e4\u00e4 sit\u00e4 suoraan.<\/p>\n<h4>ROM-muistia on useita eri tyyppej\u00e4:<\/h4>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vcex-spacing wpex-w-100 wpex-clear\" style=\"height:20px;\"><\/div><div class=\"vc_row wpb_row vc_inner vc_row-fluid wpex-relative\"><div class=\"wpb_column vc_column_container vc_col-sm-4\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p class=\"translation-block\"><strong>EEPROM:<\/strong> S\u00e4hk\u00f6isesti pyyhitt\u00e4v\u00e4 ja ohjelmoitava vain luku -muisti (EEPROM) on ei-haihtuvaa muistia, jota k\u00e4ytt\u00e4j\u00e4 voi muokata. T\u00e4m\u00e4 onnistuu k\u00e4ytt\u00e4m\u00e4ll\u00e4 normaalia korkeampaa j\u00e4nnitett\u00e4, jonka avulla tietoa voidaan kirjoittaa ja poistaa useita kertoja. EEPROMiin kirjoittaminen tapahtuu yleens\u00e4 yksi tavu kerrallaan.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-4\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p class=\"translation-block\"><strong>EPROM:<\/strong> Poistettava ja ohjelmoitava vain luku -muisti (EPROM) on ROM-tyyppi, jota voidaan ohjelmoida, tyhjent\u00e4\u00e4 ja uudelleenohjelmoida useita kertoja. Tyhjennys tapahtuu altistamalla siru ultraviolettivalolle sirun kuoressa olevan ikkunan kautta.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-4\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p class=\"translation-block\"><strong>PROM:<\/strong> Ohjelmoitava vain luku -muisti (PROM) toimitetaan tyhj\u00e4n\u00e4 ja ohjelmoidaan my\u00f6hemmin PROM-ohjelmoijalla tai polttimella. Siihen voidaan kirjoittaa vain kerran, mink\u00e4 j\u00e4lkeen data on pysyv\u00e4\u00e4 eik\u00e4 sit\u00e4 voi poistaa tai kirjoittaa uudelleen.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Tietokoneen ensisijaiset muistityypit ovat v\u00e4ltt\u00e4m\u00e4tt\u00f6mi\u00e4 laitteen toiminnan kannalta. Ne sijaitsevat emolevyll\u00e4 ja mahdollistavat nopean p\u00e4\u00e4syn tietoihin ja ohjeisiin, joita suoritin tarvitsee tietojen hakemiseen ja k\u00e4sittelyyn tehokkaasti.<\/p>\n<p>Keskityt\u00e4\u00e4n nyt toissijaiseen tietokoneen muistiin, joka t\u00e4ydent\u00e4\u00e4 ensisijaista muistia tarjoamalla pitk\u00e4aikaista tallennustilaa tiedoille ja sovelluksille.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid vc_row-o-equal-height vc_row-o-content-middle vc_row-flex wpex-vc-full-width-row wpex-vc-full-width-row--no-padding wpex-relative tablet-fullwidth-columns\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"vc_separator wpb_content_element vc_separator_align_center vc_sep_width_100 vc_sep_border_width_10 vc_sep_pos_align_center vc_separator_no_text vc_sep_color_grey wpb_content_element  wpb_content_element\" ><span class=\"vc_sep_holder vc_sep_holder_l\"><span class=\"vc_sep_line\"><\/span><\/span><span class=\"vc_sep_holder vc_sep_holder_r\"><span class=\"vc_sep_line\"><\/span><\/span>\n<\/div><\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid wpex-relative\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><h2 class=\"vcex-heading vcex-heading-plain vcex-module wpex-heading wpex-text-2xl wpex-h2\"><span class=\"vcex-heading-inner wpex-inline-block\">Toissijainen tietokoneen muisti<\/span><\/h2><div class=\"vc_row wpb_row vc_inner vc_row-fluid vc_row-o-content-middle vc_row-flex wpex-relative\"><div class=\"wpb_column vc_column_container vc_col-sm-4\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><figure class=\"vcex-image vcex-module\"><div class=\"vcex-image-inner wpex-relative wpex-inline-block\"><img width=\"584\" height=\"374\" src=\"https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/05\/recover.png\" class=\"vcex-image-img wpex-align-middle\" alt=\"\" decoding=\"async\" srcset=\"https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/05\/recover.png 584w, https:\/\/drivesaversdatarecovery.com\/wp-content\/uploads\/2024\/05\/recover-300x192.png 300w\" sizes=\"(max-width: 584px) 100vw, 584px\" \/><\/div><\/figure><\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-8\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Toissijainen tietokoneen muisti on paikka, johon tallennetaan s\u00e4ilytett\u00e4v\u00e4t tiedot \u2013 esimerkiksi asiakirjat, tietokannat, valokuvat, videot jne.<\/p>\n<p>Toissijainen tietokoneen muisti eroaa l\u00e4hes kaikessa ensisijaisesta muistista, ja ero alkaa jo sijainnista. Ensisijainen muisti sijaitsee emolevyll\u00e4, kun taas toissijainen muisti on erillisess\u00e4 sis\u00e4isess\u00e4 tai ulkoisessa tallennuslaitteessa, joka on liitetty tietokoneeseen suoraan tai verkon kautta.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Toissijainen muisti on paljon edullisempaa kuin ensisijainen muisti. Mutta saat mit\u00e4 tilaat, sill\u00e4 luku- ja kirjoitusnopeudet ovat huomattavasti hitaammat. Toissijaisen tietokoneen muistin kohdalla hidas ei aina tarkoita huonoa. Se, mit\u00e4 laskentastandardeilla pidet\u00e4\u00e4n hitaana, on sinulle usein vain murto-osa sekunnista.<\/p>\n<p>Toissijaisia muistityyppej\u00e4 on useita. K\u00e4yt\u00e4t todenn\u00e4k\u00f6isesti n\u00e4iden vaihtoehtojen yhdistelm\u00e4\u00e4 varmuuskopiointiin tai ylivuodon hallintaan.<\/p>\n<h4>T\u00e4ss\u00e4 on katsaus saatavilla oleviin vaihtoehtoihin:<\/h4>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vcex-spacing wpex-w-100 wpex-clear\" style=\"height:20px;\"><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<ul>\n<li class=\"translation-block\"><strong><a href=\"https:\/\/drivesaversdatarecovery.com\/fi\/data-recovery-services\/devices-supported\/hard-drive-recovery\/\" target=\"_self\">Kiintolevyt (HDD)<\/a>\u202f:<\/strong> HDD-levyt olivat aikoinaan yleisin tietokoneiden datavarastointimuoto, mutta niist\u00e4 on tullut vanhanaikaisia solid-state-asemien (SSD) yleistymisen my\u00f6t\u00e4.<\/li>\n<li class=\"translation-block\"><strong><a href=\"https:\/\/drivesaversdatarecovery.com\/fi\/data-recovery-services\/devices-supported\/solid-state-drive-ssd-data-recovery\/\" target=\"_self\">Puolijohdelevyt (SSD)<\/a>\u202f:<\/strong> SSD:t ja sis\u00e4\u00e4nrakennetut SSD:t ovat nyky\u00e4\u00e4n yleisin toissijaisen datavarastoinnin muoto. N\u00e4m\u00e4 levyt k\u00e4ytt\u00e4v\u00e4t flash-teknologiaa tietojen nopeaan ja tehokkaaseen tallennukseen.<\/li>\n<li class=\"translation-block\"><strong><a href=\"https:\/\/drivesaversdatarecovery.com\/fi\/data-recovery-services\/devices-supported\/removable-media-data-recovery\/\" target=\"_self\">USB-muistit \/ Tietokoneiden muistikortit<\/a>\u202f:<\/strong> USB-muistitikkuja ja tietokoneiden muistikortteja k\u00e4ytet\u00e4\u00e4n monissa elektronisissa laitteissa, kuten digikameroissa, \u00e4lypuhelimissa, tableteissa, pelikonsolissa ja USB-laitteissa sek\u00e4 kehittyneiss\u00e4 SSD-asemissa. T\u00e4llainen datavarastointi tarjoaa erinomaista kannettavuutta. Koska USB-muistit eiv\u00e4t sis\u00e4ll\u00e4 liikkuvia osia \u2013 toisin kuin HDD-levyt \u2013 ne ovat v\u00e4hemm\u00e4n alttiita fyysisille vaurioille kuljetuksen aikana.<\/li>\n<li class=\"translation-block\"><strong>Optiset asemat (CD- tai DVD-asemat)\u202f:<\/strong> CD- tai DVD-asemat olivat aikanaan hyvin suosittu tapa siirt\u00e4\u00e4 dataa. Nyky\u00e4\u00e4n l\u00e4hes kaikki k\u00e4ytt\u00e4v\u00e4t pilvipohjaisia tallennusratkaisuja ja pienempi\u00e4, v\u00e4hemm\u00e4n hauraita mobiilivarastoinnin muotoja.<\/li>\n<\/ul>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vcex-spacing wpex-w-100 wpex-clear\" style=\"height:20px;\"><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Jokaisessa tietokoneessa on ensisijainen ja toissijainen muisti, mutta kokoonpano riippuu sinusta ja tavoitteistasi. Riippumatta siit\u00e4, miten datavarastosi on m\u00e4\u00e4ritetty, ole tietoinen tietojen menetyksen riskeist\u00e4.<\/p>\n<p class=\"translation-block\">Jos tietokoneesi tai asemasi on lakannut toimimasta ja sinulla on vaikeuksia p\u00e4\u00e4st\u00e4 k\u00e4siksi tietoihisi, <a href=\"https:\/\/drivesaversdatarecovery.com\/fi\/contact\/\" target=\"_self\">ota yhteytt\u00e4 DriveSaversiin jo t\u00e4n\u00e4\u00e4n saadaksesi asiantuntevaa apua tietojen palautukseen.<\/a><\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"Computer memory is a storage space for the data and instructions your computer needs to work with quickly. It's like a handy assistant that helps the CPU (central processing unit \u2013 the brain of your computer) to grab and process info fast, making sure everything runs smoothly. Without memory, your computer would be lost and&hellip;","protected":false},"author":25,"featured_media":74301,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"inline_featured_image":false,"footnotes":""},"categories":[264],"tags":[],"post_series":[],"class_list":["post-54526","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","entry","has-media"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>What is Computer Memory?<\/title>\n<meta name=\"description\" content=\"Computer memory is one of the most important parts of your device, and it\u2019s a component everyone should understand.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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