Zi 字媒體

在 CentOS 6.9X64 上使用 RAID 5 星期五, 23六月2017 1. 安裝 mdadm 套件  # yum install mdadm  2. 查看目前磁碟狀態  # fdisk -l | grep ‘Disk /dev/sd’  Disk /dev/sda: 10.7 GB, 10737418240 bytes  Disk /dev/sdb: 21.5 GB, 21474836480 bytes  Disk /dev/sdc: 21.5 GB, 21474836480 bytes  Disk /dev/sdd: 21.5 GB, 21474836480 bytes  Disk /dev/sde: 21.5 GB, 21474836480 bytes 3. 建立磁碟分割區  # fdisk /dev/sdb  重複上面的動作，完成所有的磁碟  # fdisk /dev/sdc  # fdisk /dev/sdd  # fdisk /dev/sde  4. 建立 /dev/md0 磁碟陣列分割區 # mdadm –create –verbose –auto=yes /dev/md0 –level=5 –raid-devices=4 /dev/sd[b-e] mdadm: layout defaults to left-symmetric mdadm: layout defaults to left-symmetric mdadm: chunk size defaults to 512K mdadm: /dev/sdb appears to be part of a raid array:        level=raid0 devices=0 ctime=Thu Jan  1 08:00:00 1970 mdadm: partition table exists on /dev/sdb but will be lost or        meaningless after creating array mdadm: /dev/sdc appears to be part of a raid array:        level=raid0 devices=0 ctime=Thu Jan  1 08:00:00 1970 mdadm: partition table exists on /dev/sdc but will be lost or        meaningless after creating array mdadm: /dev/sdd appears to be part of a raid array:        level=raid0 devices=0 ctime=Thu Jan  1 08:00:00 1970 mdadm: partition table exists on /dev/sdd but will be lost or        meaningless after creating array mdadm: /dev/sde appears to be part of a raid array:        level=raid0 devices=0 ctime=Thu Jan  1 08:00:00 1970 mdadm: partition table exists on /dev/sde but will be lost or        meaningless after creating array mdadm: size set to 20955136K Continue creating array? yes mdadm: Defaulting to version 1.2 metadata mdadm: array /dev/md0 started. 5. 查看建置結果 # fdisk -l | grep /dev/md0 Disk /dev/md0: 64.4 GB, 64374177792 bytes # cat /proc/mdstat Personalities : [raid6] [raid5] [raid4] md0 : active raid5 sde[4] sdd[2] sdc[1] sdb[0]       62865408 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/3] [UUU_]       [>………………..]  recovery =  2.8% (607044/20955136) finish=6.7min speed=50587K/sec unused devices: # mdadm -D /dev/md0 /dev/md0:         Version : 1.2   Creation Time : Wed Jun 29 08:16:51 2016      Raid Level : raid5      Array Size : 62865408 (59.95 GiB 64.37 GB)   Used Dev Size : 20955136 (19.98 GiB 21.46 GB)    Raid Devices : 4   Total Devices : 4     Persistence : Superblock is persistent     Update Time : Wed Jun 29 08:17:14 2016           State : clean, degraded, recovering  Active Devices : 3 Working Devices : 4  Failed Devices : 0   Spare Devices : 1          Layout : left-symmetric      Chunk Size : 512K  Rebuild Status : 6% complete            Name : localhost.localdomain:0  (local to host localhost.localdomain)            UUID : 17b9df4d:e3542df5:34c1a172:298a07a5          Events : 2     Number   Major   Minor   RaidDevice State        0       8       16        0      active sync   /dev/sdb        1       8       32        1      active sync   /dev/sdc        2       8       48        2      active sync   /dev/sdd        4       8       64        3      spare rebuilding   /dev/sde 6. 格式化分割區 # mkfs -t ext4 /dev/md0 mke2fs 1.41.12 (17-May-2010) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=128 blocks, Stripe width=384 blocks 3932160 inodes, 15716352 blocks 785817 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=4294967296 480 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks:         32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,         4096000, 7962624, 11239424 Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 35 mounts or 180 days, whichever comes first.  Use tune2fs -c or -i to override. 7. 建立掛載目錄並掛載  # mkdir /home/RAID5 # mount /dev/md0 /home/RAID5 # df -h Filesystem            Size  Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root                       8.3G 1022M  6.9G  13% / tmpfs                 931M     0  931M   0% /dev/shm /dev/sda1             477M   63M  389M  14% /boot /dev/md0               59G   52M   56G   1% /home/RAID5 8. 查看硬碟的 UUID  # blkid | grep /dev/md0 /dev/md0: UUID=”a24bbe2b-c0f1-4417-99d9-866ea1f2a33d” TYPE=”ext4″ 9. 用 vim 或 gedit修改 /etc/fstab  # vim(gedit) /etc/fstab  加入下面一行 UUID=a24bbe2b-c0f1-4417-99d9-866ea1f2a33d  /home/RAID5         ext4    defaults        1 1 10. 編輯 /etc/mdadm.conf  設定檔 (後要用 vim 或 gedit 打開查看) # mdadm –detail –scan –verbose >> /etc/mdadm.conf ARRAY /dev/md0 level=raid5 num-devices=4 metadata=1.2 name=localhost.localdomain:0 UUID=232bc54c:6583d975:ab90c836:78be7854    devices=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde 11. 重新啟動電腦 # sync;sync;reboot 12. 磁碟分割資訊 # fdisk -l | grep /dev/sd Disk /dev/sda: 10.7 GB, 10737418240 bytes /dev/sda1   *           1          64      512000   83  Linux /dev/sda2              64        1306     9972736   8e  Linux LVM Disk /dev/sdb: 21.5 GB, 21474836480 bytes /dev/sdb1               1        2610    20964793+  fd  Linux raid autodetect Disk /dev/sdc: 21.5 GB, 21474836480 bytes /dev/sdc1               1        2610    20964793+  fd  Linux raid autodetect Disk /dev/sdd: 21.5 GB, 21474836480 bytes /dev/sdd1               1        2610    20964793+  fd  Linux raid autodetect Disk /dev/sde: 21.5 GB, 21474836480 bytes /dev/sde1               1        2610    20964793+  fd  Linux raid autodetect 13. 檢查是否有正確掛載 # df -h Filesystem            Size  Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root                       8.3G 1022M  6.9G  13% / tmpfs                 931M     0  931M   0% /dev/shm /dev/sda1             477M   63M  389M  14% /boot /dev/md0               59G   52M   56G   1% /home/RAID5 好的分享如香水： Telegram Tweet 列印 請按讚： 喜歡 正在載入... 相關