{"id":658,"date":"2020-04-13T10:45:22","date_gmt":"2020-04-13T08:45:22","guid":{"rendered":"http:\/\/tech.sosthe.sk\/?page_id=658"},"modified":"2020-04-13T10:45:22","modified_gmt":"2020-04-13T08:45:22","slug":"raid-redundant-array-of-independent-disks","status":"publish","type":"page","link":"http:\/\/tech.sosthe.sk\/index.php\/odborne-predmety\/pocitacove-systemy\/raid-redundant-array-of-independent-disks\/","title":{"rendered":"RAID – Redundant Array of Independent Disks"},"content":{"rendered":"

RAID<\/span><\/em><\/strong>\u00a0m\u00f4\u017eeme vytv\u00e1ra\u0165<\/span>\u00a0softv\u00e9rovo<\/span><\/em><\/strong>\u00a0pomocou prostriedkov opera\u010dn\u00e9ho syst\u00e9mu, \u010do je s\u00edce lacn\u00e9, ale menej spo\u013eahliv\u00e9 a v\u00fdkonn\u00e9.\u00a0Alebo<\/span>\u00a0hardwarovo<\/span><\/em><\/strong>\u00a0, kedy sa o v\u0161etko star\u00e1 radi\u010d.\u00a0V dne\u0161nej dobe je aj v\u00e4\u010d\u0161ina dom\u00e1cich po\u010d\u00edta\u010dov vybaven\u00e1 radi\u010dom s jednoduch\u00fdm HW raid, tak\u017ee nie je probl\u00e9m vyu\u017ei\u0165 RAID 0<\/strong><\/em> alebo RAID 1<\/strong><\/em>.<\/span><\/p>\n

Z\u00e1kladn\u00e9 typy RAID<\/em><\/span><\/h3>\n
\n
RAID 0<\/em><\/strong> – strip – sp\u00e1janie<\/span><\/dt>\n
Minimum 2 disky, d\u00e1ta s\u00fa ulo\u017een\u00e9 striedavo v tzv. Pr\u00fa\u017ekoch (strips).\u00a0S\u00fa\u010dasn\u00fd z\u00e1pis \/ \u010d\u00edtanie na v\u0161etky disky (zaka\u017ed\u00fdm nie\u010do in\u00e9), oboje je n-kr\u00e1t zr\u00fdchlen\u00e9.\u00a0Porucha jedn\u00e9ho disku znamen\u00e1, \u017ee pr\u00eddeme o v\u0161etky d\u00e1ta.<\/span><\/dd>\n
RAID 1<\/strong><\/em> – mirror<\/em> – zrkadlenie<\/span><\/dt>\n
Minimum 2 disky.\u00a0\u010c\u00edtanie zo v\u0161etk\u00fdch naraz, tzn.\u00a0zr\u00fdchlenie, zapisuje sa na oba disky to ist\u00e9.\u00a0Bezpe\u010dn\u00e9, vyu\u017eijem iba \u010das\u0165 kapacity.<\/span><\/dd>\n
RAID 3<\/strong><\/em> – strip s paritou<\/em> – sp\u00e1janie s kontrolou<\/span><\/dt>\n
K d\u00e1tam sa prid\u00e1va kontroln\u00fd s\u00fa\u010det na samostatn\u00fd disk.\u00a0Nahradil RAID 5kou.<\/span><\/dd>\n
RAID 5<\/em><\/strong> – strip s distribuovanou paritou<\/em><\/span><\/dt>\n
Minimum 3 disky.\u00a0Ukladan\u00e9 d\u00e1ta + parita, z ktorej je mo\u017en\u00e9 obnovi\u0165 po\u0161koden\u00e9 d\u00e1ta.\u00a0\u010c\u00edtanie zo v\u0161etk\u00fdch diskov naraz mimo parity, tzn.\u00a0zr\u00fdchlenie n-1 kr\u00e1t.\u00a0Pri z\u00e1pise je potrebn\u00e9 po\u010d\u00edta\u0165 paritu – HW akceler\u00e1cie na radi\u010di, vyu\u017eit\u00e1 kapacita je (n-1) kr\u00e1t ve\u013ekos\u0165 disku.\u00a0Zvl\u00e1dne v\u00fdpadok jedn\u00e9ho disku.<\/span><\/dd>\n
RAID 6<\/strong><\/em> – strip s distribuovanou paritou x2<\/em><\/span><\/dt>\n
Obdoba RAID 5, ale 2x parita, zvl\u00e1dne v\u00fdpadok dvoch diskov naraz, minimum 4 disky, kapacita (n-2) kr\u00e1t.<\/span><\/dd>\n
RAID 10<\/strong><\/em> – RAID 1 a RAID 0<\/span><\/dt>\n
R\u00fdchlos\u0165 z RAID 0 a bezpe\u010dnos\u0165 RAID 1, minimum 4 disky, kapacita je polovica, r\u00fdchlej\u0161\u00ed ako RAID 5.<\/span><\/dd>\n
RAID 50<\/strong><\/em> – RAID 5 a RAID 0<\/span><\/dt>\n
Minimum 6 diskov, obdoba RAID 5, r\u00fdchlej\u0161\u00ed.<\/span><\/dd>\n<\/dl>\n

Pr\u00edbuzn\u00e9 term\u00edny<\/span><\/h3>\n
\n
hot-swap disk<\/em><\/dt>\n
vlastnos\u0165 diskov\u00e9ho po\u013ea a disku, ktor\u00e1 umo\u017e\u0148uje v\u00fdmenn\u00fd disk za chodu<\/span><\/dd>\n
hot-spare disk<\/em><\/dt>\n
n\u00e1hradn\u00fd disk, ktor\u00fd \u010dak\u00e1, a\u017e d\u00f4jde k poruche disku a automaticky ho nahrad\u00ed, v niektor\u00fdch syst\u00e9moch sa funkcia hotspare automaticky cyklicky vymie\u0148a (kv\u00f4li za\u0165a\u017eeniu)<\/span><\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"

RAID\u00a0m\u00f4\u017eeme vytv\u00e1ra\u0165\u00a0softv\u00e9rovo\u00a0pomocou prostriedkov opera\u010dn\u00e9ho syst\u00e9mu, \u010do je s\u00edce lacn\u00e9, ale menej spo\u013eahliv\u00e9 a v\u00fdkonn\u00e9.\u00a0Alebo\u00a0hardwarovo\u00a0, kedy sa o v\u0161etko star\u00e1 radi\u010d.\u00a0V dne\u0161nej dobe je aj v\u00e4\u010d\u0161ina…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":13,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/pages\/658"}],"collection":[{"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/comments?post=658"}],"version-history":[{"count":1,"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/pages\/658\/revisions"}],"predecessor-version":[{"id":659,"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/pages\/658\/revisions\/659"}],"up":[{"embeddable":true,"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/pages\/13"}],"wp:attachment":[{"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/media?parent=658"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}