# 測試災難復原 ``` active raid6 sdl[10] sdk[9](F) sdi[8] sdh[7] sdg[6] sdf[5] sde[4] sdd[3] sdc[2] sdb[1](F) sda[0] Update Time : Mon Sep 2 18:49:53 2019 State : clean, degraded Active Devices : 9 Working Devices : 9 Failed Devices : 2 Spare Devices : 0 Layout : left-symmetric Chunk Size : 512K Consistency Policy : bitmap Name : omvNAS1:raid6 (local to host omvNAS1) UUID : 4b63596b:c0babc7b:f8cb8b0d:ec5c853a Events : 236 Number Major Minor RaidDevice State 0 8 0 0 active sync /dev/sda - 0 0 1 removed 2 8 32 2 active sync /dev/sdc 3 8 48 3 active sync /dev/sdd 4 8 64 4 active sync /dev/sde 5 8 80 5 active sync /dev/sdf 6 8 96 6 active sync /dev/sdg 7 8 112 7 active sync /dev/sdh 8 8 128 8 active sync /dev/sdi - 0 0 9 removed 10 8 176 10 active sync /dev/sdl 1 8 16 - faulty /dev/sdb 9 8 160 - faulty /dev/sdk ``` 指令檢視 ``` cat /proc/mdstat mdadm --detail --verbose /dev/md0 ``` active raid6 sdl\[10] **sdk**[**9**](https://app.gitbook.com/s/-Lh81JtaIQ84bwQqz_Wh/andoid-shou-ji/untitled/F)**\[F]** sdi\[8] sdh\[7] sdg\[6] sdf\[5] sde\[4] sdd\[3] sdc\[2] **sdb**[**1**](https://app.gitbook.com/s/-Lh81JtaIQ84bwQqz_Wh/andoid-shou-ji/untitled/F)**\[F]** sda\[0] /dev/sdb，/dev/sdk有問題，移除 ``` mdadm --fail /dev/md0 /dev/sdb mdadm --remove /dev/md0 /dev/sdb mdadm --remove /dev/md0 /dev/sdk ``` 重新加入新硬碟 ``` mdadm --add /dev/md0 /dev/sdb mdadm --add /dev/md0 /dev/sdk ``` ![](/files/-LnopO09DF0faWrsXu0K) 圖形介面功能修復 ``` cat /proc/mdstat Personalities : [raid6] [raid5] [raid4] [linear] [multipath] [raid0] [raid1] [raid10] md0 : active raid6 sdk[12] sdh[7] sdc[2] sdi[8] sdf[5] sdl[10] sdb[11] sdd[3] sdg[6] sde[4] sda[0] 52743513600 blocks super 1.2 level 6, 512k chunk, algorithm 2 [11/10] [UUUUUUUUU_U] [>....................] recovery = 0.0% (50184/5860390400) finish=46703.3min speed=2091K/sec bitmap: 44/44 pages [176KB], 65536KB chunk ``` ![](/files/-Lnt_R6Ai1Lff9CT7_zB) 指定/dev/md0內某一裝置故障 mdadm --fail /dev/md0 /dev/sdb ## 實作將損毀硬碟移除並重新加入新硬碟做rebuild的流程 將故障/dev/sdb由/dev/md0內移除 mdadm --remove /dev/md0 /dev/sdb ``` mdadm --fail /dev/md0 /dev/sdb mdadm: set /dev/sdb faulty in /dev/md0 mdadm --remove /dev/md0 /dev/sdb mdadm: hot removed /dev/sdb from /dev/md0 ``` 加入新硬碟 ![](/files/-LnpE1o1mF67dodMSRBC) 指令為mdadm --add /dev/md0 /dev/sdb ## 從cockpit系統檢測硬碟讀寫的狀態，新加入的硬碟有大量寫入(rebuild)
![](/files/-LoNXr3LBj34qVtFtyi8) 將/dev/sdb加入/dev/md0 mdadm --add /dev/md0 /dev/sdb 將/dev/md0啟動 mdadm --auto-detect 將/dev/md0停止 mdadm --stop /dev/md0 ``` mdadm --stop /dev/md0 mdadm --auto-detect mdadm --assemble --scan ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://kawsing.gitbook.io/opensystem/andoid-shou-ji/untitled/ce-shi-zai-nan-fu-yuan.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.