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§@ªÌ: erin19     ®É¶¡: 2005-10-24 11:29 PM    ¼ÐÃD: [ª¾ÃÑ]ºÏºÐ°}¦C(RAID)­ì²z¤Î¦U­Ó¶¥¼h¸Ô²Ó¤¶²Ð

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¡@¡@RAID 0+1¡GMirror + Striping (ºÏºÐÃè®g+¤Á¤À/©µ®i)

¡@¡@RAID 3¡GParallel with Parity (¥­¦æ¦P¦ì¤¸Àˬd)

¡@¡@RAID 5¡GStriping with Rotating Parity (¤Á¤À/©µ®i+½üÂà¦P¦ì¤¸)

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ºÏºÐ°}¦C²ºÙRAID(Redundant Arrays of Inexpensive Disks)¡A¦³¡¨»ù®æ«K©y¥B¦h¾lªººÏºÐ°}¦C¡¨¤§·N¡C¨ä­ì²z¬O§Q¥Î°}¦C¤è¦¡¨Ó§@ºÏºÐ²Õ¡A°t¦X¸ê®Æ¤À´²±Æ¦Cªº³]­p¡A´£¤É¸ê®Æªº¦w¥þ©Ê¡CºÏºÐ°}¦C¥D­n°w¹ïµwºÐ¡A¦b®e¶q¤Î³t«×¤W¡AµLªk¸ò¤WCPU¤Î°O¾ÐÅ骺µo®i¡A´£¥X§ïµ½¤èªk¡CºÏºÐ°}¦C¬O¥Ñ«Ü¦h«K©y¡B®e¶q¸û¤p¡Bí©w©Ê¸û°ª¡B³t«×¸ûºCºÏºÐ¡A²Õ¦X¦¨¤@­Ó¤j«¬ªººÏºÐ²Õ¡A§Q¥Î­Ó§OºÏºÐ´£¨Ñ¸ê®Æ©Ò²£¥Íªº¥[¦¨®ÄªG¨Ó´£¤É¾ã­ÓºÏºÐ¨t²Îªº®Ä¯à¡C¦P®É¡A¦bÀx¦s¸ê®Æ®É¡A§Q¥Î³o¶µ§Þ³N¡A±N¸ê®Æ¤Á³Î¦¨³\¦h°Ï¬q¡A¤À§O¦s©ñ¦b¦U­ÓµwºÐ¤W¡C

¡@ºÏºÐ°}¦CÁÙ¯à§Q¥Î¦P¦ì¤¸Àˬd(Parity Check)ªºÆ[©À¡A¦b°}¦C¤¤¥ô¤@ÁûµwºÐ¬G»Ù®É¡A¤´¥iŪ¥X¸ê®Æ¡A¦b¸ê®Æ­««Ø®É¡A±N¬G»ÙµwºÐ¤ºªº¸ê®Æ¡A¸g­pºâ«á­«·s¸m¤J·sµwºÐ¤¤¡C

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¥Ñ¬ü°ê¬f§JµÜ¤j¾Ç(University of California-Berkeley)¦b¢°¢¸¢·¢¶¦~¡Aµoªíªº¤å³¹¡G¡¨A Case for Redundant Arrays of Inexpensive Disks¡¨¡C¤å³¹¤¤¡A½Í¨ì¤FRAID³o­Ó¦r·J¡A¦Ó¥B©w¸q¤FRAIDªº5¼h¯Å¡C¬f§JµÜ¤j¾Ç¬ã¨s¨ä¬ã¨s¥Øªº¬°¡A¤ÏÀ³·í®ÉCPU§Ö³tªº©Ê¯à¡CCPU®Ä¯à¨C¦~¤j¬ù¦¨ªø30¡ã50%¡A¦ÓµwºÏ¾÷¥u¯à¦¨ªø¬ù7%¡C¬ã¨s¤p²Õ§Æ±æ¯à§ä¥X¤@ºØ·sªº§Þ³N¡A¦bµu´Á¤º¡A¥ß§Y´£¤É®Ä¯à¨Ó¥­¿Å¹q¸£ªº¹Bºâ¯à¤O¡C¦b·í®É¡A¬f§JµÜ¬ã¨s¤p²Õªº¥D­n¬ã¨s¥Øªº¬O®Ä¯à»P¦¨¥»¡C

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¡@ºÏºÐ°}¦C¨ä¼Ë¦¡¦³¤TºØ¡A¤@¬O¥~±µ¦¡ºÏºÐ°}¦CÂd¡B¤G¬O¤º±µ¦¡ºÏºÐ°}¦C¥d¡A¤T¬O§Q¥Î³nÅé¨Ó¼ÒÀÀ¡C¥~±µ¦¡ºÏºÐ°}¦CÂd³Ì±`³Q¨Ï¥Î¤j«¬¦øªA¾¹¤W¡A¨ã¥i¼ö©â´«(Hot Swap)ªº¯S©Ê¡A¤£¹L³oÃþ²£«~ªº»ù®æ³£«Ü¶Q¡C¤º±µ¦¡ºÏºÐ°}¦C¥d¡A¦]¬°»ù®æ«K©y¡A¦ý»Ý­n¸û°ªªº¦w¸Ë§Þ³N¡A¾A¦X§Þ³N¤H­û¨Ï¥Î¾Þ§@¡C¥t¥~§Q¥Î³nÅé¼ÒÀÀªº¤è¦¡¡A¥Ñ©ó·|©ì²Ö¾÷¾¹ªº³t«×¡A¤£¾A¦X¤j¸ê®Æ¬y¶qªº¦øªA¾¹¡C

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RAID 0¡GStriping/Span (¤Á¤À/©µ®i)

RAID 1¡GMirroring (ºÏºÐÃè®g)

RAID 0+1¡GMirror + Striping (ºÏºÐÃè®g+¤Á¤À/©µ®i)

RAID 3¡GParallel with Parity (¥­¦æ¦P¦ì¤¸Àˬd)

RAID 5¡GStriping with Rotating Parity (¤Á¤À/©µ®i+½üÂà¦P¦ì¤¸)


RAID 0¡GStriping/Span (¤Á¤À/©µ®i)
RAID 0¡A¥¦¬O±N¸ê®ÆÀx¦s¦b2­Ó¥H¤WªºµwºÐ¾÷¡A¨ä±N¥þ³¡ºÏºÐ¾÷ªºÀx¦s®e¶q¦X¨Ö¡AÂǥѱN¸ê®Æ¤Á¤À¨ì¥þ³¡ªººÏºÐ¾÷¤W¡A¶i¦æ¥­¦æŪ¼g¡A¦Ó¹F¨ì´£°ª®Ä¯à¼W¥[®e¶q¡C¦ý¬O¯ÊÂI¬O§¹¥þ¨S¦³®e¿ù¯à¤O¡A¥u­n¦³¤@­ÓºÏºÐ¬G»Ù¡A´N·|¾É­P°}¦CºÏºÐªº©Ò¦³¸ê®Æ¡A·´©ó¤@¥¹µLªk®¾¦^¡C

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RAID 1¡GMirroring (ºÏºÐÃè®g)
RAID 1¡A¥²¶·¥Ñ2­Ó¥H¤WªºµwºÐ©Ò²Õ¦¨¡A¥ÑºÏºÐ°}¦C(RAID)¨Ó±±¨î¡A±N¸ê®Æ¦P®É¼g¤J²Ä1­Ó»P²Ä2­ÓµwºÐ¡A¨ä2²ÕµwºÐ¤Wªº¸ê®Æ§¹¥þ¬Û¦P¡A¤]´N¬O¨ä¤¤¤@­ÓµwºÐ¬O¥Î¨Ó§@³Æ¥÷¥Î³~¡F·í¨ä¤¤¦³¤@­ÓµwºÐ¬G»Ù®É¡A¨t²Î·Ó±`¹B§@¥¿±`¡CRAID 1¬O©Ò¦³RAID¶¥¼h¤W¡A¸gÀٮįq³Ì¦n¡A®Ä¯à«Ü°ª¡A·¥¨Îªº¸ê®Æ¦w¥þ©Ê¡C¬O©Ò¦³¶¥¼h¤¤¨Ï¥Î³Ì¦h³Ì¼s³Ì²Å¦X·íªìRAID³]­p·§©Àªº¤@ºØ¡C°ß¤@¤p¯ÊÂI¬O¡A¨ä°}¦CºÏºÐ®e¶q¬O¥þ³¡µwºÐ®e¶qªº¤@¥b¡C


RAID 0+1¡GMirror + Striping (ºÏºÐÃè®g+¤Á¤À/©µ®i)
RAID 0+1¡A¬Oµ²¦X¤FRAID 0»P1¨âºØ¼Ò¦¡¡A³o­Ó¶¥¼h¶·¨ã³Æ4­Ó©Î¥H¤WªºÂù¼ÆµwºÐ©Ò²Õ¦¨¡C³o­Ó¼Ò¦¡¬O¥Ñ2­ÓµwºÐ¿í¦uRAID 0³W½d¡A³]©w¦¨¤@²Õ¡A¦A¥Ñ¨C²Õ¶¡¿í´`RAID 1ªº³W½d¡A¨ÏRAID 0+1¾Ö¦³®e¿ù¤O¤Î¾ãÅéŪ¼g³t«×»P¸ê®Æ¦w¥þ©Ê¡C¤£¹L¡A¯ÊÂI¬O¦¨¥»«Ü°ª¡C


RAID 3¡GParallel with Parity (¥­¦æ¦P¦ì¤¸Àˬd)
RAID 3¡A³Ì¤Ö¶·3­ÓµwºÐ©Î¥H¤W¡A³o­Ó¶¥¼hªººÏºÐ°}¦C¨ã³Æ¤F¦P¦ì¤¸°ª¶¥´¼¼z«¬ºtºâªk¡A§Q¥Î¤@­ÓµwºÐ¨ÓÀx¦s¨ä¹Bºâ¥X¨Óªº¦P¦ì¤¸­Èªº¸ê®Æ¡C·í°}¦CºÏºÐ¤¤¦³¤@­ÓµwºÐµo¥Í¬G»Ù®É(·íµM¤£¯à¬O¦P¦ì¤¸ºÐ)¡A¥u­n´«¤W·sµwºÐ«á¡AºÏºÐ°}¦C±±¨î¾¹´N¯à§Q¥Î¦P¦ì¤¸ºÐªº¸ê®Æ¡A­«·sºtºâ±o¨ì¨ä¦³¸ê®Æ¨Ã¦^¼g«Ø¥ß¡C¦]¬°¨ä¦P¦ì¤¸Àˬd¸ê®ÆO±N¸ê®Æ¤Á³Î¦¨¼Æ­Ó°Ï¬q¡A§Q¥ÎXORºtºâªk­pºâ¥X¦P¦ì¤¸¸ê®Æ¡F¦Ó¨ä°Ï¬q¥HBytes­pºâ®É¡AºÙ¬°RAID 3¡A¦pªG¬O¥HBlock­pºâ®É¡A´NºÙ¬°RAID 4¡C©Ò¥HRAID 3¦b¾ãÅéŪ¼g®Ä¯à·|¸ûºC¸û®t¡A¦ý¦b¦¨¥»¤W·|¤ñRAID 0+1Á٬٤@ÂI¡A¨ä°}¦CºÏºÐ¾ãÅé®e¶q­pºâ¤½¦¡¬°N-1¡C


RAID 5¡GStriping with Rotating Parity (¤Á¤À/©µ®i+½üÂà¦P¦ì¤¸)
RAID 5¡A³Ì¤Ö¶·3­ÓµwºÐ¡A¨ä¤u§@­ì²z»PRAID 3¬Û¦ü¡A¥D­n®t§O¬O¨ä¦P¦ì¤¸¸ê®Æ¨S¦³©T©w¦b¦P­ÓµwºÐ¡A¬O¥H½ü¬y¤è¦¡Àx¦s¦b¨C­ÓµwºÐ¤W¡A¬GºÙ½üÂà¦P¦ì¤¸¡C·íºÏºÐ°}¦C±±¨î¾¹§Q¥ÎXORºtºâ¥X¦P¦ì¤¸Àˬd¸ê®Æ«á¡A·|ÀHµÛ¸ê®Æ¤À§O¼g¤J¦U¥xµwºÐ¤W¡A¦]¦¹¾ãÅéŪ¼g®Ä¯à¤ñRAID 3­n¦n¤@¨Ç¡A·íµM¤ñRAID 0­n®t¡C¤£¹L¦b¤j«¬¸ê®Æ³B²z®É¡A»Ý¦P®ÉŪ¼g¦h­ÓµwºÐ¡A¦Ó¦P¦ì¤¸Àˬd¬O¥ÑºÏºÐ°}¦C±±¨î¾¹ªºXORÅÞ¿è©Ò±±¨îªº¡A©Ò¥H¸ê®Æ³B²z¶V¤j¶V¦h®É¡A¤@©w·|¦³©Ò¿ò¥¢¡A¦ý³o­Ó¶¥¼hªºRAIDÁÙ¬O¥i¥H´£¨Ñ«Ü°ªªº®e¿ù¯à¤O¡C

[ Last edited by sodown on 2005-10-30 at 12:39 PM ]
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[ Last edited by sodown on 2006-3-15 at 11:25 AM ]
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