Ⅰ linux瀛︿範镞ヨ板崄涓 杞浠剁佺洏阒靛垪RAID
纾佺洏阒靛垪镄勮嫳鏂囧叏绉版槸Rendant Arrays of Inexpensive Disks锛圧AID锛夛纴鍗冲归敊寤変环纾佺洏阒靛垪銆傚彲浠ラ氲繃涓浜涙妧链灏嗗氢釜杈冨皬镄勭佺洏鏁村悎鎴愪负涓涓杈冨ぇ镄勭佺洏璁惧囷绂钥岃繖涓璁惧囧彲涓嶆㈠瓨鍌ㄥ姛鑳借屽凡锛屽畠杩桦叿链夋暟鎹淇濇姢锷熻兘銆
RAID镄勭瓑绾э细
脳 RAID-0锛堢瓑閲忔ā寮忥纴stripe锛夛细镐ц兘杈冧匠
杩欑嶆ā寮忎娇鐢ㄧ浉钖屽瀷鍙峰拰瀹归噺镄勭佺洏𨱒ョ粍鎴愶纴鍙浠ユ湁澶氢釜锛孯AID浼氩皢姣忎釜纾佺洏鍒掑垎鎴愮瓑閲忕殑鍖哄潡锛堜竴鑸涓4K锛2K绛夌瓑锛夛纴铹跺悗褰扑竴涓鏂囦欢琚鍐椤叆镞讹纴璇ユ枃浠朵细渚濇嵁鍧楀ぇ灏忓垏鍓插ソ锛屼箣钖庝緷搴忔斁鍒板悇涓纾佺洏閲岄溃铡伙纴鐢变簬姣忎釜纾佺洏浜ら敊瀛樻斁鏁版嵁锛屽洜姝ゅ綋浣犵殑鏁版嵁瑕佸啓鍏RAID镞讹纴鏁版嵁浼氲绛夐噺镄勬斁缃鍒板悇涓纾佺洏涓婂幓銆傝秺澶氱佺洏缁勬垚RAID-0,闾ｄ箞镄勮瘽镐ц兘镶瀹氩氨瓒婂ソ浜嗐
缂虹偣锛氢竴涓纾佺洏鎸傜偣锛屾暣涓鏂囦欢绯荤粺宕╃洏锛屾棤娉曟仮澶崭简銆傚苟涓旀墍链夌佺洏瀹归噺蹇呴’涓镙凤纴涓岖劧镐ц兘浼氢笅闄嶃
脳 RAID-1锛堟椠镀忔ā寮忥纴mirror锛夛细瀹屾暣澶囦唤
杩欑嶆ā寮忎篃瑕佺浉钖屽瀷鍙凤纴鐩稿悓瀹归噺镄勭佺洏锛屾渶濂藉畬鍏ㄤ竴镙凤纴涓涓妯″瓙鍒诲嚭𨱒ョ殑銆
鏁版嵁浼犻佸埌I/O镐荤嚎琚澶嶅埗澶氢唤鍒板悇涓纾佺洏锛屽洜姝ゅ啓镄勬ц兘浼氩彉寰楀緢宸锛屼笉杩囧傛灉浣犵敤纭浠禦AID锛堢佺洏阒靛垪鍗★级锛岀佺洏阒靛垪鍗′细涓诲姩甯浣犲嶅埗锛屼笉闇瑕両/O镐荤嚎銆备絾鏄纾佺洏阒靛垪鍗″緢璐垫淮锻锻锛屾垜涔颁笉璧凤纴镓浠ュ緢鎭插墽銆俣AID-1链澶х殑鐢ㄩ斿湪浜庡囦唤锛屼笉杩囧畠镄勮诲彇镐ц兘寰埚ソ銆
脳 RAID 0+1, RAID 1+0
RAID-0镄勬ц兘杈冧匠浣嗘槸鏁版嵁涓嶅畨鍏锛孯AID-1鏁版嵁瀹夊叏浣嗘槸镐ц兘涓崭匠锛岄偅鑳戒笉鑳界粍钖堜笅鎾掋
RAID 0+1锛氩厛璁㎞鍧楃佺洏缁勬垚RAID-0, 钖屾椂鍐嶈╁彟澶栫殑N鍧楃佺洏涔熺粍鎴怰AID-0, 杩欐牱瀛愭垜寰楀埌浜嗕袱缁凴AID-0锛岀劧钖庡皢杩欎袱缁凴AID-0鍐岖粍鎴愪竴缁凴AID-1銆
RAID 1+0锛氩厛璁2N鍧楃佺洏缁勬垚N涓缁勶纴姣忎釜缁勪袱涓纾佺洏锛屾疮涓缁勯噷闱㈢殑涓や釜纾佺洏缁勬垚RAID-1, 铹跺悗灏呜繖N缁凴AID-1缁勬垚RAID-0銆
缂虹偣锛氱佺洏链変竴鍗婄殑瀹归噺鐢ㄦ潵锅氩囦唤浜嗭纴鎭插墽锻锛侊紒锛
RAID-5锛氭ц兘涓庢暟鎹澶囦唤镄勫潎琛¤冭槛
RAID-5镊冲皯闇瑕佷笁鍧椾互涓婄殑纾佺洏镓嶈兘缁勬垚杩欑岖被鍨嬬殑纾佺洏阒靛垪銆傝繖绉岖佺洏阒靛垪镄勬暟鎹鍐椤叆链夌偣绫讳技RAID-0,涓嶈繃姣忔″惊鐜鍐椤叆杩囩▼涓锛屽湪姣忓潡纾佺洏杩桦姞鍏ヤ竴涓钖屼綅妫镆ユ暟鎹锛圥arity锛夛纴杩欎釜鏁版嵁浼氲板綍鍏朵粬纾佺洏镄勫囦唤鏁版嵁锛岀敤浜庡綋链夌佺洏鎹熸瘉镞剁殑鏁戞彺銆
RAID-5镄勫归噺瑕佸噺鎺変竴涓纾佺洏瀹归噺锛屼篃灏辨槸阒靛垪镄勭佺洏镐绘暟N-1,锲犱负闇瑕佷竴涓纾佺洏瀹归噺𨱒ヤ缭瀛桦悓浣嶆镆ユ暟鎹甈arity
RAID-5镄勮诲彇镐ц兘寰堜笉阌欙纴璺烺AID-0链夊缑涓𨰾硷纴浣嗘槸鍐椤叆镐ц兘灏卞緢灏村艾浜嗭纴鍦ㄨ蒋浠剁佺洏阒靛垪镄勬椂鍊欙纴CPU杩桦缑鑺辨椂闂村幓璁＄畻钖屼綅妫镆ユ暟鎹銆傚悓镞跺畠鍙鑳戒缭璇佷竴涓纾佺洏鎹熷潖鏁版嵁镄勫畨鍏锛屽傛灉涓や釜纾佺洏鎹熷潖灏辨寕浜嗐
RAID-6锛氲窡RAID-5绫讳技锛屼笉杩囱繖娆′细浣跨敤涓ゅ潡纾佺洏瀹归噺浣滀负Parity镄勫瓨鍌锛屽畠鍙浠ユ敮鎸佷袱鍧楃佺洏钖屾椂鎹熷潖锛岃繖涓姒傜巼搴旇ユ瘆璧板湪椹璺涓婅涓杈嗛┐杞︽挒鍒扮殑姒傜巼杩树绠钖э纴^_^
====Spare Disk锛氶勫囩佺洏镄勫姛鑳====
涓轰简璁╃郴缁熷彲浠ュ疄镞跺湪鍧忔帀纾佺洏镞朵富锷ㄩ吨寤猴纴闇瑕侀勫囩佺洏spare disk镄勮緟锷╋纴骞虫椂涓嶅寘钖鍦ㄧ佺洏阒靛垪涓锛屽綋纾佺洏阒靛垪链変换浣旷佺洏鎹熷潖镞讹纴spare disk椹涓婅涓诲姩𨰾夊叆纾佺洏阒靛垪涓锛屽苟灏嗗潖鎺夌殑纾佺洏绉婚櫎纾佺洏阒靛垪锛岀劧钖庣珛鍗抽吨寤烘暟鎹绯荤粺锛屽傛灉浣犵殑纾佺洏阒靛垪杩樻敮鎸佺儹鎻掓嫈灏辨洿鐖戒简锛屽洜涓鸿繖涓镞跺椤彧闇瑕佹妸鍧忕殑闾ｉ楃佺洏𨰾斾笅𨱒ワ纴鎹涓娄竴涓鏂扮殑锛屽啀灏嗘柊镄勭佺洏璁剧疆鎴恠pare disk锛屽畬鎴愪简锛屼笉鐢ㄥ叧链洪吨钖鍙浠ュ畬鎴愪竴鍒囥傝繖瀵规湇锷″櫒镄勭ǔ瀹氭ф湁寰埚ソ镄勫府锷┿
纾佺洏阒靛垪镄勪紭镣癸细
脳 鏁版嵁瀹夊叏涓庡彲闱犳э纴杩欓噷鎸囩殑鏄纭鐩桦潖浜嗘暟鎹鍙浠ユ尳锲炪
脳 璇诲啓镐ц兘锛孯AID-0鍙浠ュ姞寮鸿诲啓镐ц兘锛岃╀綘镄勭郴鍝I/O绯荤粺閮ㄥ垎寰椾互鏀瑰杽
脳 瀹归噺锛氩彲浠ヨ╁氢釜纾佺洏缁勫悎璧锋潵锛屽洜姝ゅ崟涓鏂囦欢绯荤粺鍙浠ユ湁鐩稿綋澶х殑瀹归噺銆
centos鎻愪緵镄勮蒋浠剁佺洏阒靛垪涓簃dadm杩椤楄蒋浠讹纴浠ュ垎鍖烘垨纾佺洏涓哄崟浣嶏纴涔熷氨鏄璇翠綘涓嶉渶瑕佸氢釜纾佺洏灏卞彲浠ヨ捐′綘镄勭佺洏阒靛垪浜嗐傛ゅ栵纴mdadm鏀鎸佸垰鍒氭彁鍒扮殑RAID-0,RAID-1,RAID-5绛夌骇锛岃缮鏀鎸乻pare disk镄勫姛鑳姐傝屼笖鎻愪緵镄勭＄悊链哄埗杩桦彲浠ヨ揪鍒扮被浼煎彲浠ョ儹鎻掓嫈镄勫姛鑳斤纴鍙浠ュ湪绾匡纸鏂囦欢绯荤粺姝ｅ父浣跨敤锛夎繘琛屽垎鍖虹殑鎶芥崲锛屼娇鐢ㄤ笂闱炲父镄勬柟渚裤伞
娉ㄦ剰锛氱‖鐩樼佺洏阒靛垪鍦╨inux鐪嬭捣𨱒ュ氨鏄涓涓澶х殑纾佺洏锛屾墍链夎惧囨枃浠跺悕涓/dev/sd[a-p]锛屽洜涓轰娇鐢ㄥ埌SCSI镄勬ā鍧楃殑铡熷洜銆傝岃蒋浠剁佺洏阒靛垪锲犱负鏄绯荤粺浠跨湡锛屽洜姝や娇鐢ㄧ殑璁惧囨枃浠跺悕镞剁郴缁熺殑璁惧囨枃浠讹纴鏂囦欢钖崭负/dev/md0, /dev/md1锛屼袱钥呮敞镒忓尯鍒銆
====杞浠剁佺洏阒靛垪镄勮剧疆====
# mdadm 钬揹etail /dev/md0
# mdadm 钬揷reate 钬揳uto=yes /dev/md[0-9] 钬搑aid-device=4 钬搇evel=[015] 钬搒pare-device=2 /dev/sd5 /dev/sd6
钬揷reate锛氢负鏂板缓RAID镄勫弬鏁
钬揳uto=yes锛氩喅瀹氭柊寤哄悗闱㈡帴镄勮蒋浠剁佺洏阒靛垪璁惧囷纴鍗/dev/md0, /dev/md1绛
钬搑aid-devices=N锛氢娇鐢∟涓纾佺洏浣滀负纾佺洏阒靛垪镄勮惧
钬搒pare-devices=N锛氢娇鐢∟涓纾佺洏浣滀负澶囩敤spare璁惧
钬搇evel=[015]锛氲剧疆纾佺洏阒靛垪镄勭瓑绾с傛敮鎸佸緢澶氾纴涓嶈繃寤鸿鍙瑕佺敤0,1,5鍗冲彲
钬揹etail锛氩悗闱㈡墍鎺ョ殑闾ｄ釜纾佺洏阒靛垪璁惧囩殑璇︾粏淇℃伅
娉ㄦ剰链钖庨溃鎺ョ殑璁惧囨枃浠跺悕锛屽彲浠ユ椂鏁村潡纾佺洏锛屾瘆濡/dev/sdb锛屼篃鍙浠ユ槸涓涓鍒嗗尯锛屾瘆濡/dev/sdb1锛屼笉杩囱繖浜涜惧囨枃浠跺悕镄勬暟閲忔绘暟蹇呴’绛変簬钬搑aid-devices鍜屸搒pare-devices镄勪釜鏁版诲拰镓嶈屻
涓嬮溃鎴戞潵璇曡瘯寤虹珛涓涓猂AID-5镄勮蒋浠剁佺洏阒靛垪锛岃矊浼艰繖涓姣旇缉甯哥敤锛屽緢阃傚悎銆
鎴戝笇链涜繖涓猂AID-5鐜澧冩椂杩欐牱瀛愮殑锛
脳 鍒╃敤4涓鍒嗗尯缁勬垚RAID-5
脳 姣忎釜鍒嗗尯澶х害涓1G澶у皬锛岄渶瑕佺‘瀹氭疮涓鍒嗗尯涓镙峰ぇ杈冧匠
脳 鍙﹀栧姞涓涓鍒嗗尯璁剧疆涓簊paredisk
脳 杩欎釜sparedisk镄勫ぇ灏忎笌鍏朵粬RAID镓闇鍒嗗尯涓镙峰ぇ
脳 灏嗘RAID-5璁惧囨寕杞藉埌/mnt/raid鐩褰曚笅闱
鍏堢敤fdisk鏋勫缓5涓1G镄勫垎鍖猴细
# fdisk /dev/sda
鍓嶉溃鐪佺暐銆伞伞
Command (m for help):n
姣忔″垎1000M绌洪棿澶у皬锛屾敞镒忥纴鎴戜笉鐭ラ亾绁为┈铡熷洜锛宖irst 镓囧尯瑕佹坠锷ㄨ緭鍏ワ纴鐢╬阃夐”镆ョ湅钖庯纴鐢ㄦ渶钖庝竴涓鍒嗗尯镄勬墖鍖哄彿+2049镓嶆槸绗涓涓绌洪棽镓囧尯鍙凤纴杩欎釜鍙鑳芥椂fedora镄勪竴涓狰ug锛屽垎鍖哄眳铹朵笉鏄杩炵画镄勶纴涓岖′简锛岃嚜宸卞幓璇曡瘯銆??/p
链钖庣殑鍒嗗尯鐢╬镆ョ湅钖庯纴鏄杩欐牱瀛愮殑锛
璁惧 Boot Start End Blocks Id System
/dev/sda1 2048 206847 102400 7 HPFS/NTFS/exFAT
/dev/sda2 * 206848 169859071 84826112 7 HPFS/NTFS/exFAT
/dev/sda3 169859072 462827821 146484375 7 HPFS/NTFS/exFAT
/dev/sda4 462829568 976773119 256971776 5 Extended
/dev/sda5 462833664 463243263 204800 83 Linux
/dev/sda6 463245312 631181311 83968000 83 Linux
/dev/sda7 631183360 799119359 83968000 83 Linux
/dev/sda8 799121408 803315711 2097152 82 Linux swap / Solaris
/dev/sda9 803317760 805365759 1024000 83 Linux
/dev/sda10 805367808 807415807 1024000 83 Linux
/dev/sda11 807417856 809465855 1024000 83 Linux
/dev/sda12 809467904 811515903 1024000 83 Linux
/dev/sda13 811517952 813565951 1024000 83 Linux
钖庨溃镄勪粠9鍒13灏辨槸鍒氩垰鎴戝垎镄5涓鍒嗗尯锛屾疮涓澶ф1G锛屽ぇ灏忛兘鐩稿悓銆
# partprobe
鎺ヤ笅𨱒ュ氨绠鍗曞暒鍟︼纴锛岄氲繃mdadm𨱒ュ垱寤虹佺洏阒靛垪钖с傚摝涔
# mdadm 钬揷reate 钬揳uto=yes /dev/md0 钬搇evel=5 钬搑aid-devices=4 钬搒pare-devices=1 /dev/sda{9,10,11,12,13}
镆ョ湅涓嬶纸绛変笅锛屽厛铡诲枬𨱒鍜栧暋鍏堬纴锲犱负濡傛灉浣犵洿鎺ョ珛椹杩愯岋纴鍙鑳藉嚭鐜颁笅闱㈢殑姝ｅ湪building鏁版嵁镄勪俊鎭锛夛细
澶嶅埗浠ｇ爜
浠ｇ爜濡备笅:
# mdadm --detail /dev/md0
/dev/md0: ==RAID璁惧囨枃浠跺悕
Version : 1.2
Creation Time : Sun Oct 28 10:03:43 2012 ==RAID琚鍒涘缓镄勬椂闂
Raid Level : raid5 ==姝RAID镄勭瓑绾
Array Size : 3068928 (2.93 GiB 3.14 GB) ==姝RAID鍙鐢ㄧ佺洏瀹归噺
Used Dev Size : 1022976 (999.17 MiB 1047.53 MB) ==姣忎釜璁惧囧彲鐢ㄥ归噺
Raid Devices : 4 ==鐢ㄤ綔RAID镄勮惧囨暟閲
Total Devices : 5 ==鍏ㄩ儴镄勮惧囨暟閲
Persistence : Superblock is persistent
Update Time : Sun Oct 28 10:04:01 2012
State : clean, degraded, recovering
Active Devices : 3 ==钖锷ㄧ殑锛坅ctive锛夎惧囨暟閲
Working Devices : 5 ==鍙宸ヤ綔镄勮惧囨暟閲
Failed Devices : 0 ==鍑虹幇阌栾镄勮惧囨暟閲
Spare Devices : 2 ==棰勫噑pare纾佺洏镄勬暟閲
Layout : left-symmetric
Chunk Size : 512K
Rebuild Status : 17% complete
Name : localhost.localdomain:0 (local to host localhost.localdomain)
UUID : 657db303:887c7b6f:b8d8fc91:dc7b3374
Events : 3
Number Major Minor RaidDevice State
0 8 9 0 active sync /dev/sda9
1 8 10 1 active sync /dev/sda10
2 8 11 2 active sync /dev/sda11
5 8 12 3 spare rebuilding /dev/sda12
4 8 13 - spare /dev/sda13
鐪熸ｇ殑瀹屾垚build钖庣殑淇℃伅搴旇ユ槸锛
澶嶅埗浠ｇ爜
浠ｇ爜濡备笅:
# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Oct 28 10:03:43 2012
Raid Level : raid5
Array Size : 3068928 (2.93 GiB 3.14 GB)
Used Dev Size : 1022976 (999.17 MiB 1047.53 MB)
Raid Devices : 4
Total Devices : 5
Persistence : Superblock is persistent
Update Time : Sun Oct 28 10:06:00 2012
State : clean
Active Devices : 4
Working Devices : 5
Failed Devices : 0
Spare Devices : 1
Layout : left-symmetric
Chunk Size : 512K
Name : localhost.localdomain:0 (local to host localhost.localdomain)
UUID : 657db303:887c7b6f:b8d8fc91:dc7b3374
Events : 20
Number Major Minor RaidDevice State
0 8 9 0 active sync /dev/sda9
1 8 10 1 active sync /dev/sda10
2 8 11 2 active sync /dev/sda11
5 8 12 3 active sync /dev/sda12
4 8 13 - spare /dev/sda13
杩桦彲浠ラ氲繃镆ョ湅/proc/mdstat镆ョ湅纾佺洏阒靛垪𨱍呭喌锛
# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sda12[5] sda13[4](S) sda11[2] sda10[1] sda9[0]
3068928 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] [UUUU]
unused devices: none
镙煎纺鍖栦笌鎸傝浇浣跨敤RAID锛
# mkfs -t ext4 /dev/md0
# mkdir /mnt/raid
# mount /dev/md
# mount /dev/md0 /mnt/raid
# df
鏂囦欢绯荤粺 1K-鍧 宸茬敤 鍙鐢 宸茬敤% 鎸傝浇镣
rootfs 82649712 4681980 73769332 6% /
devtmpfs 1964632 4 1964628 1% /dev
tmpfs 1975352 600 1974752 1% /dev/shm
tmpfs 1975352 1160 1974192 1% /run
/dev/sda6 82649712 4681980 73769332 6% /
tmpfs 1975352 0 1975352 0% /sys/fs/cgroup
tmpfs 1975352 0 1975352 0% /media
/dev/sda7 82649712 8355056 70096256 11% /home
/dev/sda5 198337 90718 97379 49% /boot
/dev/md0 3020688 70048 2797196 3% /mnt/raid
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====浠跨湡RAID阌栾镄勬晳鎻存ā寮====
# mdadm 钬搈anage /dev/md[0-9] [--add 璁惧嘳 [--remove 璁惧嘳 [--fail 璁惧嘳
钬揳dd锛氩皢钖庨溃镄勮惧囧姞鍏ュ埌杩欎釜md涓
钬搑emove锛氩皢钖庨溃镄勮惧囦粠杩欎釜md涓鍒犻櫎
钬揻ail锛氩皢钖庨溃镄勮惧囱剧疆鎴愬嚭阌欑殑鐘舵
镓嫔姩妯℃嫙纾佺洏阌栾锛
# cp -a /etc /var/log /mnt/raid/
# df -h /mnt/raid/; -smh /mnt/raid/*
鏂囦欢绯荤粺 瀹归噺 宸茬敤 鍙鐢 宸茬敤% 鎸傝浇镣
/dev/md0 2.9G 126M 2.7G 5% /mnt/raid
45M /mnt/raid/etc
4.4M /mnt/raid/log
16K /mnt/raid/lost+found
# mdadm 钬搈anage /dev/md0 钬揻ail /dev/sda10
mdadm: set /dev/sda10 faulty in /dev/md0
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澶嶅埗浠ｇ爜
浠ｇ爜濡备笅:
# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Oct 28 10:03:43 2012
Raid Level : raid5
Array Size : 3068928 (2.93 GiB 3.14 GB)
Used Dev Size : 1022976 (999.17 MiB 1047.53 MB)
Raid Devices : 4
Total Devices : 5
Persistence : Superblock is persistent
Update Time : Sun Oct 28 10:24:42 2012
State : clean, degraded, recovering
Active Devices : 3
Working Devices : 4
Failed Devices : 1
Spare Devices : 1
Layout : left-symmetric
Chunk Size : 512K
Rebuild Status : 6% complete
Name : localhost.localdomain:0 (local to host localhost.localdomain)
UUID : 657db303:887c7b6f:b8d8fc91:dc7b3374
Events : 23
Number Major Minor RaidDevice State
0 8 9 0 active sync /dev/sda9
4 8 13 1 spare rebuilding /dev/sda13
2 8 11 2 active sync /dev/sda11
5 8 12 3 active sync /dev/sda12
1 8 10 - faulty spare /dev/sda10
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澶嶅埗浠ｇ爜
浠ｇ爜濡备笅:
# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Oct 28 10:03:43 2012
Raid Level : raid5
Array Size : 3068928 (2.93 GiB 3.14 GB)
Used Dev Size : 1022976 (999.17 MiB 1047.53 MB)
Raid Devices : 4
Total Devices : 5
Persistence : Superblock is persistent
Update Time : Sun Oct 28 10:26:53 2012
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 1
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Name : localhost.localdomain:0 (local to host localhost.localdomain)
UUID : 657db303:887c7b6f:b8d8fc91:dc7b3374
Events : 43
Number Major Minor RaidDevice State
0 8 9 0 active sync /dev/sda9
4 8 13 1 active sync /dev/sda13
2 8 11 2 active sync /dev/sda11
5 8 12 3 active sync /dev/sda12
1 8 10 - faulty spare /dev/sda10
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# fdisk /dev/sda
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# partprobe
# partprobe
[root@localhost ~]# mdadm 钬搈anage /dev/md0 钬揳dd /dev/sda14 钬搑emove /dev/sda10
mdadm: added /dev/sda14
mdadm: hot removed /dev/sda10 from /dev/md0
澶嶅埗浠ｇ爜
浠ｇ爜濡备笅:
# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Oct 28 10:03:43 2012
Raid Level : raid5
Array Size : 3068928 (2.93 GiB 3.14 GB)
Used Dev Size : 1022976 (999.17 MiB 1047.53 MB)
Raid Devices : 4
Total Devices : 5
Persistence : Superblock is persistent
Update Time : Sun Oct 28 10:33:04 2012
State : clean
Active Devices : 4
Working Devices : 5
Failed Devices : 0
Spare Devices : 1
Layout : left-symmetric
Chunk Size : 512K
Name : localhost.localdomain:0 (local to host localhost.localdomain)
UUID : 657db303:887c7b6f:b8d8fc91:dc7b3374
Events : 45
Number Major Minor RaidDevice State
0 8 9 0 active sync /dev/sda9
4 8 13 1 active sync /dev/sda13
2 8 11 2 active sync /dev/sda11
5 8 12 3 active sync /dev/sda12
6 8 14 - spare /dev/sda14
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====寮链鸿嚜锷ㄦ寕杞絉AID====
鍙闇瑕佺煡阆/dev/md0镄刄UID灏辫
# mdadm 钬揹etail /dev/md0 | grep -i uuid
UUID : 657db303:887c7b6f:b8d8fc91:dc7b3374
# vi /etc/mdadm.conf
ARRAY /dev/md0 UUID=657db303:887c7b6f:b8d8fc91:dc7b3374
# vi /etc/fstab锛屽湪链钖庝竴琛屽姞鍏
/dev/md0 /mnt/raid ext4 defaults 1 2
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# umount /dev/md0; mount -a
[root@localhost ~]# df /mnt/raid/
鏂囦欢绯荤粺 1K-鍧 宸茬敤 鍙鐢 宸茬敤% 鎸傝浇镣
/dev/md0 3020688 120464 2746780 5% /mnt/raid
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====鍏抽棴RAID====
1锛屽厛鍗歌浇
# umount /dev/md0
2锛屽垹闄ら厤缃鏂囦欢鍐呭癸细
# vi /etc/fstab锛屽垹闄わ纸娉ㄩ喷锛変笅闱㈣繖琛
/dev/md0 /mnt/raid ext4 defaults 1 2
3锛屽叧闂/dev/md0锛
# mdadm 钬搒top /dev/md0
4锛# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
unused devices: none
5锛寁i /etc/mdadm.conf锛屽垹闄わ纸娉ㄩ喷锛変笅闱㈢殑琛
ARRAY /dev/md0 UUID=657db303:887c7b6f:b8d8fc91:dc7b3374
濂界殑锛屾墍链夌殑RAID镄勫熀链閮借插畬浜嗐备笉杩囦笂闱㈡垜鐢ㄧ殑镞朵竴鍧楃佺洏锛屽疄闄呯敤阃斾腑璁板缑鐢ㄥ氩潡纾佺洏鍟婏紒锛
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