{"id":351,"date":"2015-01-10T09:55:22","date_gmt":"2015-01-10T08:55:22","guid":{"rendered":"http:\/\/www.schoen-bloed.at\/blog\/?p=351"},"modified":"2015-01-10T09:55:22","modified_gmt":"2015-01-10T08:55:22","slug":"wie-nehme-ich-ein-mdadm-raid-5-wieder-in-betrieb","status":"publish","type":"post","link":"https:\/\/www.schoen-bloed.at\/blog\/2015\/01\/wie-nehme-ich-ein-mdadm-raid-5-wieder-in-betrieb\/","title":{"rendered":"Wie nehme ich ein mdadm Raid 5 wieder in Betrieb?"},"content":{"rendered":"

Ich hatte vor kurzen den Fall das 2 Festplatten „gleichzeitig“ aus meinem Raid5 gefallen sind und damit das Raid angehalten wurde. Es gibt dabei ein paar Dinge zu beachten.<\/p>\n

Der Blog Eintrag von Al4<\/a> hat mir sehr dabei geholfen und ist die Grundlage f\u00fcr diese „\u00dcbersetzung“.<\/p>\n

Basis Informationen<\/p>\n

. \/dev\/sdd1 – Erste Festplatte die aus dem Raid gefallen ist
\n. \/dev\/sde1 – Letzte Festplatte die aus dem Raid gefallen ist
\n\/dev\/sdf1 – gut
\n\/dev\/sdg1 – gut
\n. \/dev\/sdi1 – Zweite \u00a0Festplatte die aus dem Raid gefallen ist<\/p>\n

md1 : inactive sdf1[2](S) sdi1[5](S) sdg1[3](S) sde1[1](S) sdd1[4](S)
\n9767558003 blocks super 1.2<\/p>\n

# mdadm –examine \/dev\/sdf1
\n\/dev\/sdf1:
\nMagic : a92b4efc
\nVersion : 1.2
\nFeature Map : 0x0
\nArray UUID : da911fdf:fef70705:5ce9ac7a:8ad0068c
\nName : sealserver:1 (local to host sealserver)
\nCreation Time : Sat Dec 29 21:19:57 2012
\nRaid Level : raid6
\nRaid Devices : 5<\/p>\n

Avail Dev Size : 3907021954 (1863.01 GiB 2000.40 GB)
\nArray Size : 11721062400 (5589.04 GiB 6001.18 GB)
\nUsed Dev Size : 3907020800 (1863.01 GiB 2000.39 GB)
\nData Offset : 2048 sectors
\nSuper Offset : 8 sectors
\nState : clean
\nDevice UUID : 3d312e70:e3f73d7b:0b51da97:fc86a21e<\/p>\n

Update Time : Sat Apr 6 04:59:54 2013
\nChecksum : 77f78d11 – correct
\nEvents : 1359455<\/p>\n

Layout : left-symmetric
\nChunk Size : 512K<\/p>\n

Device Role : Active device 2
\nArray State : ..AA. (‚A‘ == active, ‚.‘ == missing)<\/p>\n

# mdadm –examine \/dev\/sdi1
\n\/dev\/sdi1:
\nMagic : a92b4efc
\nVersion : 1.2
\nFeature Map : 0x0
\nArray UUID : da911fdf:fef70705:5ce9ac7a:8ad0068c
\nName : sealserver:1 (local to host sealserver)
\nCreation Time : Sat Dec 29 21:19:57 2012
\nRaid Level : raid6
\nRaid Devices : 5<\/p>\n

Avail Dev Size : 3907025072 (1863.01 GiB 2000.40 GB)
\nArray Size : 11721062400 (5589.04 GiB 6001.18 GB)
\nUsed Dev Size : 3907020800 (1863.01 GiB 2000.39 GB)
\nData Offset : 2048 sectors
\nSuper Offset : 8 sectors
\nState : clean
\nDevice UUID : e8ac390d:b383573a:d3e742da:c8c32288<\/p>\n

Update Time : Sat Feb 2 04:27:35 2013
\nChecksum : 7fb95a98 – correct
\nEvents : 1223851<\/p>\n

Layout : left-symmetric
\nChunk Size : 512K<\/p>\n

Device Role : Active device 4
\nArray State : .AAAA (‚A‘ == active, ‚.‘ == missing)<\/p>\n

\/dev\/sdg1:
\nMagic : a92b4efc
\nVersion : 1.2
\nFeature Map : 0x0
\nArray UUID : da911fdf:fef70705:5ce9ac7a:8ad0068c
\nName : sealserver:1 (local to host sealserver)
\nCreation Time : Sat Dec 29 21:19:57 2012
\nRaid Level : raid6
\nRaid Devices : 5<\/p>\n

Avail Dev Size : 3907021954 (1863.01 GiB 2000.40 GB)
\nArray Size : 11721062400 (5589.04 GiB 6001.18 GB)
\nUsed Dev Size : 3907020800 (1863.01 GiB 2000.39 GB)
\nData Offset : 2048 sectors
\nSuper Offset : 8 sectors
\nState : clean
\nDevice UUID : c6cbcd92:b99c7169:70773d54:525a1372<\/p>\n

Update Time : Sat Apr 6 04:59:54 2013
\nChecksum : 989ec62c – correct
\nEvents : 1359455<\/p>\n

Layout : left-symmetric
\nChunk Size : 512K<\/p>\n

Device Role : Active device 3
\nArray State : ..AA. (‚A‘ == active, ‚.‘ == missing)<\/p>\n

# mdadm –examine \/dev\/sde1
\n\/dev\/sde1:
\nMagic : a92b4efc
\nVersion : 1.2
\nFeature Map : 0x0
\nArray UUID : da911fdf:fef70705:5ce9ac7a:8ad0068c
\nName : sealserver:1 (local to host sealserver)
\nCreation Time : Sat Dec 29 21:19:57 2012
\nRaid Level : raid6
\nRaid Devices : 5<\/p>\n

Avail Dev Size : 3907025072 (1863.01 GiB 2000.40 GB)
\nArray Size : 11721062400 (5589.04 GiB 6001.18 GB)
\nUsed Dev Size : 3907020800 (1863.01 GiB 2000.39 GB)
\nData Offset : 2048 sectors
\nSuper Offset : 8 sectors
\nState : clean
\nDevice UUID : 4aca1dc5:a40f6742:bfe0f536:094c559c<\/p>\n

Update Time : Sat Apr 6 04:57:44 2013
\nChecksum : b0e19e47 – correct
\nEvents : 1359452<\/p>\n

Layout : left-symmetric
\nChunk Size : 512K<\/p>\n

Device Role : Active device 1
\nArray State : .AAA. (‚A‘ == active, ‚.‘ == missing)<\/p>\n

# mdadm –examine \/dev\/sdd1
\n\/dev\/sdd1:
\nMagic : a92b4efc
\nVersion : 1.2
\nFeature Map : 0x0
\nArray UUID : da911fdf:fef70705:5ce9ac7a:8ad0068c
\nName : sealserver:1 (local to host sealserver)
\nCreation Time : Sat Dec 29 21:19:57 2012
\nRaid Level : raid6
\nRaid Devices : 5<\/p>\n

Avail Dev Size : 3907021954 (1863.01 GiB 2000.40 GB)
\nArray Size : 11721062400 (5589.04 GiB 6001.18 GB)
\nUsed Dev Size : 3907020800 (1863.01 GiB 2000.39 GB)
\nData Offset : 2048 sectors
\nSuper Offset : 8 sectors
\nState : clean
\nDevice UUID : ccc8f389:ca77f213:3ff73902:d39da2d1<\/p>\n

Update Time : Thu Jan 10 00:06:55 2013
\nChecksum : 4765743a – correct
\nEvents : 1206432<\/p>\n

Layout : left-symmetric
\nChunk Size : 512K<\/p>\n

Device Role : Active device 0
\nArray State : AAAAA (‚A‘ == active, ‚.‘ == missing)<\/p>\n

mdadm –manage \/dev\/md1 –remove<\/p>\n

\/dev\/sdd1
\n\/dev\/sdi1<\/p>\n

ARRAY \/dev\/md1 metadata=1.2 name=sealserver:1 UUID=da911fdf-fef7-0705-5ce9-ac7a8ad0068c devices=missing,\/dev\/sde1,\/dev\/sdf1,\/dev\/sdg1,missing<\/p>\n

mdadm –manage \/dev\/md1 -a \/dev\/sdd1 -v<\/p>\n

mdadm: \/dev\/sdd1 reports being an active member for \/dev\/md1, but a –re-add fails.
\nmdadm: not performing –add as that would convert \/dev\/sdd1 in to a spare.
\nmdadm: To make this a spare, use „mdadm –zero-superblock \/dev\/sdd1“ first.<\/p>\n

mdadm –zero-superblock \/dev\/sdd1
\nmdadm –zero-superblock \/dev\/sdi1<\/p>\n

# mdadm –manage \/dev\/md1 -a \/dev\/sdd1 -v
\nmdadm: added \/dev\/sdd1
\n# mdadm –manage \/dev\/md1 -a \/dev\/sdi1 -v
\nmdadm: added \/dev\/sdi1<\/p>\n

md1 : active raid6 sdi1[6](S) sdd1[5] sde1[1] sdg1[3] sdf1[2]
\n5860531200 blocks super 1.2 level 6, 512k chunk, algorithm 2 [5\/3] [_UUU_]
\n[>………………..] recovery = 0.0% (377556\/1953510400) finish=948.3min speed=34323K\/sec<\/p>\n

Nach Abschluss ist das Raid wieder voll einsatzf\u00e4hig.<\/p>\n

Leider habe ich den Artikel erst 2 Jahre nach dem Rebuild abgeschlossen und hab deswegen einige Informationen nicht aus erster Hand.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Ich hatte vor kurzen den Fall das 2 Festplatten „gleichzeitig“ aus meinem Raid5 gefallen sind und damit das Raid angehalten wurde. Es gibt dabei ein paar Dinge zu beachten.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,24],"tags":[],"_links":{"self":[{"href":"https:\/\/www.schoen-bloed.at\/blog\/wp-json\/wp\/v2\/posts\/351"}],"collection":[{"href":"https:\/\/www.schoen-bloed.at\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.schoen-bloed.at\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.schoen-bloed.at\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.schoen-bloed.at\/blog\/wp-json\/wp\/v2\/comments?post=351"}],"version-history":[{"count":6,"href":"https:\/\/www.schoen-bloed.at\/blog\/wp-json\/wp\/v2\/posts\/351\/revisions"}],"predecessor-version":[{"id":419,"href":"https:\/\/www.schoen-bloed.at\/blog\/wp-json\/wp\/v2\/posts\/351\/revisions\/419"}],"wp:attachment":[{"href":"https:\/\/www.schoen-bloed.at\/blog\/wp-json\/wp\/v2\/media?parent=351"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.schoen-bloed.at\/blog\/wp-json\/wp\/v2\/categories?post=351"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.schoen-bloed.at\/blog\/wp-json\/wp\/v2\/tags?post=351"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}