深夜提醒

现在是深夜，建议您注意休息，不要熬夜哦~

🏮 🏮 🏮

新年快乐

祝君万事如意心想事成！

share-image
中
ESC

centos raid 软阵列的使用

运维

创建一个 raid 设备

[root@localhost /]# mknod /dev/md1 b 9 1

  • mknod 是命令
  • /dev/md1 是设备名称，设备名称必须是 md开头后面的 b 代表的是块设备
  • 9 是主设备号 ，1是从设备号
  • 主设备号不能更改，从设备号系统唯一

创建 raid 5

[root@localhost /]# mdadm -C /dev/md1 -l 5 -n 3 /dev/sdc5 /dev/sdc6 /dev/sdc7
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md1 started.

-C代表创建，指定块设备的路径
-l 指定 raid 级别为5
-n 代表硬盘数量

查看

[root@localhost /]# mdadm --detail /dev/md1
/dev/md1:
        Version : 1.2
  Creation Time : Sat Apr 22 14:55:36 2017
     Raid Level : raid5
     Array Size : 1021952 (998.00 MiB 1046.48 MB)
  Used Dev Size : 510976 (499.00 MiB 523.24 MB)
   Raid Devices : 3
  Total Devices : 3
    Persistence : Superblock is persistent

    Update Time : Sat Apr 22 14:55:39 2017
          State : clean
 Active Devices : 3
Working Devices : 3
 Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 512K

           Name : localhost.localdomain:1  (local to host localhost.localdomain)
           UUID : 2a5294bf:dd845f28:c6c3fa2e:ed6d5d20
         Events : 18

    Number   Major   Minor   RaidDevice State
       0       8       37        0      active sync   /dev/sdc5
       1       8       38        1      active sync   /dev/sdc6
       3       8       39        2      active sync   /dev/sdc7

格式化挂载

[root@localhost /]# mkfs -t xfs /dev/md1
meta-data=/dev/md1               isize=512    agcount=8, agsize=31872 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0, sparse=0
data     =                       bsize=4096   blocks=254976, imaxpct=25
         =                       sunit=128    swidth=256 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=624, version=2
         =                       sectsz=512   sunit=8 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
[root@localhost /]# mount /dev/md1 /mnt/data

模拟失效

[root@localhost data]# mdadm  /dev/md1 -f /dev/sdc7
mdadm: set /dev/sdc7 faulty in /dev/md1


查看

[root@localhost data]# mdadm --detail /dev/md1
/dev/md1:
        Version : 1.2
  Creation Time : Sat Apr 22 14:55:36 2017
     Raid Level : raid5
     Array Size : 1021952 (998.00 MiB 1046.48 MB)
  Used Dev Size : 510976 (499.00 MiB 523.24 MB)
   Raid Devices : 3
  Total Devices : 3
    Persistence : Superblock is persistent

    Update Time : Sat Apr 22 15:04:02 2017
          State : clean, degraded
 Active Devices : 2
Working Devices : 2
 Failed Devices : 1
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 512K

           Name : localhost.localdomain:1  (local to host localhost.localdomain)
           UUID : 2a5294bf:dd845f28:c6c3fa2e:ed6d5d20
         Events : 22

    Number   Major   Minor   RaidDevice State
       0       8       37        0      active sync   /dev/sdc5
       1       8       38        1      active sync   /dev/sdc6
       -       0        0        2      removed

       3       8       39        -      faulty   /dev/sdc7

移除

[root@localhost data]# mdadm /dev/md1 --remove /dev/sdc7
mdadm: hot removed /dev/sdc7 from /dev/md1
[root@localhost data]# mdadm --detail /dev/md1
/dev/md1:
        Version : 1.2
  Creation Time : Sat Apr 22 14:55:36 2017
     Raid Level : raid5
     Array Size : 1021952 (998.00 MiB 1046.48 MB)
  Used Dev Size : 510976 (499.00 MiB 523.24 MB)
   Raid Devices : 3
  Total Devices : 2
    Persistence : Superblock is persistent

    Update Time : Sat Apr 22 15:05:02 2017
          State : clean, degraded
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 512K

           Name : localhost.localdomain:1  (local to host localhost.localdomain)
           UUID : 2a5294bf:dd845f28:c6c3fa2e:ed6d5d20
         Events : 27

    Number   Major   Minor   RaidDevice State
       0       8       37        0      active sync   /dev/sdc5
       1       8       38        1      active sync   /dev/sdc6
       -       0        0        2      removed

添加

[root@localhost data]# mdadm /dev/md1 --add /dev/sdc7
mdadm: added /dev/sdc7
[root@localhost data]# mdadm --detail /dev/md1
/dev/md1:
        Version : 1.2
  Creation Time : Sat Apr 22 14:55:36 2017
     Raid Level : raid5
     Array Size : 1021952 (998.00 MiB 1046.48 MB)
  Used Dev Size : 510976 (499.00 MiB 523.24 MB)
   Raid Devices : 3
  Total Devices : 3
    Persistence : Superblock is persistent

    Update Time : Sat Apr 22 15:05:52 2017
          State : clean
 Active Devices : 3
Working Devices : 3
 Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 512K

           Name : localhost.localdomain:1  (local to host localhost.localdomain)
           UUID : 2a5294bf:dd845f28:c6c3fa2e:ed6d5d20
         Events : 46

    Number   Major   Minor   RaidDevice State
       0       8       37        0      active sync   /dev/sdc5
       1       8       38        1      active sync   /dev/sdc6
       3       8       39        2      active sync   /dev/sdc7
文章作者：阿文
文章链接： https://www.awen.me/post/3673777329.html
版权声明：本博客所有文章除特别声明外，均采用 CC BY-NC-SA 4.0 许可协议。转载请注明来自 阿文的博客！
本文于 2017-06-14 18:57 发布，已超过半年（3241天），请注意甄别内容是否已过期。

评论

0 条评论
😀😃😄 😁😅😂 🤣😊😇 🙂🙃😉 😌😍🥰 😘😗😙 😚😋😛 😝😜🤪 🤨🧐🤓 😎🥸🤩 🥳😏😒 😞😔😟 😕🙁☹️ 😣😖😫 😩🥺😢 😭😤😠 😡🤬🤯 😳🥵🥶 😱😨😰 😥😓🤗 🤔🤭🤫 🤥😶😐 😑😬🙄 😯😦😧 😮😲🥱 😴🤤😪 😵🤐🥴 🤢🤮🤧 😷🤒🤕 🤑🤠😈 👿👹👺 🤡💩👻 💀☠️👽 👾🤖🎃 😺😸😹 😻😼😽 🙀😿😾 👍👎👏 🙌👐🤲 🤝🤜🤛 ✌️🤞🤟 🤘👌🤏 👈👉👆 👇☝️✋ 🤚🖐️🖖 👋🤙💪 🦾🖕✍️ 🙏💅🤳 💯💢💥 💫💦💨 🕳️💣💬 👁️‍🗨️🗨️🗯️ 💭💤❤️ 🧡💛💚 💙💜🖤 🤍🤎💔 ❣️💕💞 💓💗💖 💘💝💟 ☮️✝️☪️ 🕉️☸️✡️ 🔯🕎☯️ ☦️🛐⛎ ♈♉♊ ♋♌♍ ♎♏♐ ♑♒♓ 🆔⚛️🉑 ☢️☣️📴 📳🈶🈚 🈸🈺🈷️ ✴️🆚💮 🉐㊙️㊗️ 🈴🈵🈹 🈲🅰️🅱️ 🆎🆑🅾️ 🆘❌⭕ 🛑⛔📛 🚫💯💢 ♨️🚷🚯 🚳🚱🔞 📵🚭❗ ❕❓❔ ‼️⁉️🔅 🔆〽️⚠️ 🚸🔱⚜️ 🔰♻️✅ 🈯💹❇️ ✳️❎🌐 💠Ⓜ️🌀 💤🏧🚾 ♿🅿️🈳 🈂🛂🛃 🛄🛅🛗 🚀🛸🚁 🚉🚆🚅 ✈️🛫🛬 🛩️💺🛰️
加载中...

留言反馈

😀😃😄 😁😅😂 🤣😊😇 🙂🙃😉 😌😍🥰 😘😗😙 😚😋😛 😝😜🤪 🤨🧐🤓 😎🥸🤩 🥳😏😒 😞😔😟 😕🙁☹️ 😣😖😫 😩🥺😢 😭😤😠 😡🤬🤯 😳🥵🥶 😱😨😰 😥😓🤗 🤔🤭🤫 🤥😶😐 😑😬🙄 😯😦😧 😮😲🥱 😴🤤😪 😵🤐🥴 🤢🤮🤧 😷🤒🤕 🤑🤠😈 👿👹👺 🤡💩👻 💀☠️👽 👾🤖🎃 😺😸😹 😻😼😽 🙀😿😾 👍👎👏 🙌👐🤲 🤝🤜🤛 ✌️🤞🤟 🤘👌🤏 👈👉👆 👇☝️✋ 🤚🖐️🖖 👋🤙💪 🦾🖕✍️ 🙏💅🤳 💯💢💥 💫💦💨 🕳️💣💬 👁️‍🗨️🗨️🗯️ 💭💤❤️ 🧡💛💚 💙💜🖤 🤍🤎💔 ❣️💕💞 💓💗💖 💘💝💟 ☮️✝️☪️ 🕉️☸️✡️ 🔯🕎☯️ ☦️🛐⛎ ♈♉♊ ♋♌♍ ♎♏♐ ♑♒♓ 🆔⚛️🉑 ☢️☣️📴 📳🈶🈚 🈸🈺🈷️ ✴️🆚💮 🉐㊙️㊗️ 🈴🈵🈹 🈲🅰️🅱️ 🆎🆑🅾️ 🆘❌⭕ 🛑⛔📛 🚫💯💢 ♨️🚷🚯 🚳🚱🔞 📵🚭❗ ❕❓❔ ‼️⁉️🔅 🔆〽️⚠️ 🚸🔱⚜️ 🔰♻️✅ 🈯💹❇️ ✳️❎🌐 💠Ⓜ️🌀 💤🏧🚾 ♿🅿️🈳 🈂🛂🛃 🛄🛅🛗 🚀🛸🚁 🚉🚆🚅 ✈️🛫🛬 🛩️💺🛰️