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| 关键词： nbsp nestor dev desktop devices Blocks mdadm raid active Filesystem |
先在VMWARE添加硬件，3块SCSI硬盘，如果要做RAID5就得四块了。 然后用fdisk将硬盘分区，注意分区的系统格式。 Disk /dev/sdd: 3221 MB, 3221225472 bytes 255 heads, 63 sectors/track, 391 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xe45cf3b9 Device Boot Start End Blocks Id System /dev/sdd1 1 130 1044193+ fd Linux raid autodetect /dev/sdd2 131 260 1044225 fd Linux raid autodetect /dev/sdd3 261 391 1052257+ fd Linux raid autodetect Disk /dev/sde: 3221 MB, 3221225472 bytes 255 heads, 63 sectors/track, 391 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xb51587ec Device Boot Start End Blocks Id System /dev/sde1 1 130 1044193+ fd Linux raid autodetect /dev/sde2 131 260 1044225 fd Linux raid autodetect /dev/sde3 261 391 1052257+ fd Linux raid autodetect Disk /dev/sdf: 3221 MB, 3221225472 bytes 255 heads, 63 sectors/track, 391 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x5c56f4ae Device Boot Start End Blocks Id System /dev/sdf1 1 130 1044193+ fd Linux raid autodetect /dev/sdf2 131 260 1044225 fd Linux raid autodetect /dev/sdf3 261 391 1052257+ fd Linux raid autodetect 安装mdadm，并确认 apt-get install mdadm, nestor@nestor-desktop:~$ lsmod | grep md md_mod 82068 0 nestor@nestor-desktop:~$ cat /proc/devices | grep md 1 ramdisk 9 md 253 mdp nestor@nestor-desktop:~$ cat /proc/mdstat Personalities : unused devices: <none> RAID 0: nestor@nestor-desktop:~$ sudo mdadm -Cv /dev/md0 -l0 -n3 /dev/sdd1 /dev/sde1 /dev/sdf1 mdadm: chunk size defaults to 64K mdadm: array /dev/md0 started. nestor@nestor-desktop:~$ cat /proc/mdstat Personalities : [raid0] md0 : active raid0 sdf1[2] sde1[1] sdd1[0] 3132288 blocks 64k chunks unused devices: <none> nestor@nestor-desktop:~$ mdadm -D /dev/md0 mdadm: cannot open /dev/md0: Permission denied nestor@nestor-desktop:~$ sudo mdadm -D /dev/md0 /dev/md0: Version : 00.90.03 Creation Time : Sun Aug 7 01:35:11 2011 Raid Level : raid0 Array Size : 3132288 （2.99 GiB 3.21 GB） Raid Devices : 3 Total Devices : 3 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Sun Aug 7 01:35:11 2011 State : clean Active Devices : 3 Working Devices : 3 Failed Devices : 0 Spare Devices : 0 Chunk Size : 64K UUID : 7da54c47:fdd46140:e896b948:8bdba58f （local to host nestor-desktop） Events : 0.1 Number Major Minor RaidDevice State 0 8 49 0 active sync /dev/sdd1 1 8 65 1 active sync /dev/sde1 2 8 81 2 active sync /dev/sdf1 nestor@nestor-desktop:~$ sudo mkfs.ext3 /dev/md0 mke2fs 1.40.8 （13-Mar-2008） Filesystem label= OS type: Linux Block size=4096 （log=2） Fragment size=4096 （log=2） 195840 inodes, 783072 blocks 39153 blocks （5.00%） reserved for the super user First data block=0 Maximum filesystem blocks=805306368 24 block groups 32768 blocks per group, 32768 fragments per group 8160 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912 Writing inode tables: done Creating journal （16384 blocks）: done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 31 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. nestor@nestor-desktop:~$ nestor@nestor-desktop:~$ sudo mkdir /raid0disk nestor@nestor-desktop:~$ sudo mount /dev/md0 /raid0disk nestor@nestor-desktop:~$ nestor@nestor-desktop:~$ RAID 1: nestor@nestor-desktop:~$ sudo mdadm -Cv /dev/md1 -l1 -n2 -x1 /dev/sdd2 /dev/sde2 /dev/sdf2 mdadm: size set to 1044160K mdadm: array /dev/md1 started. nestor@nestor-desktop:~$ nestor@nestor-desktop:~$ nestor@nestor-desktop:~$ cat /proc/mdstat Personalities : [raid0] [raid1] md1 : active raid1 sdf2[2]（S） sde2[1] sdd2[0] 1044160 blocks [2/2] [UU] md0 : active raid0 sdf1[2] sde1[1] sdd1[0] 3132288 blocks 64k chunks unused devices: <none> nestor@nestor-desktop:~$ mdadm -D /dev/md1 mdadm: cannot open /dev/md1: Permission denied nestor@nestor-desktop:~$ sudo mdadm -D /dev/md1 /dev/md1: Version : 00.90.03 Creation Time : Sun Aug 7 01:43:55 2011 Raid Level : raid1 Array Size : 1044160 （1019.86 MiB 1069.22 MB） Used Dev Size : 1044160 （1019.86 MiB 1069.22 MB） Raid Devices : 2 Total Devices : 3 Preferred Minor : 1 Persistence : Superblock is persistent Update Time : Sun Aug 7 01:44:00 2011 State : clean Active Devices : 2 Working Devices : 3 Failed Devices : 0 Spare Devices : 1 UUID : ee1158f1:5d371eef:e896b948:8bdba58f （local to host nestor-desktop） Events : 0.4 Number Major Minor RaidDevice State 0 8 50 0 active sync /dev/sdd2 1 8 66 1 active sync /dev/sde2 2 8 82 - spare /dev/sdf2 nestor@nestor-desktop:~$ sudo mkfs.ext3 /dev/md1 mke2fs 1.40.8 （13-Mar-2008） Filesystem label= OS type: Linux Block size=4096 （log=2） Fragment size=4096 （log=2） 65280 inodes, 261040 blocks 13052 blocks （5.00%） reserved for the super user First data block=0 Maximum filesystem blocks=268435456 8 block groups 32768 blocks per group, 32768 fragments per group 8160 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376 Writing inode tables: done Creating journal （4096 blocks）: done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 23 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. nestor@nestor-desktop:~$ sudo mkdir /raid1disk nestor@nestor-desktop:~$ sudo mount /dev/md1 /raid1disk RAID 5, 并模拟坏盘： nestor@nestor-desktop:~$ sudo mdadm -Cv /dev/md5 -l5 -n3 -x1 -c128 /dev/sdd3 /dev/sde3 /dev/sdf3 /dev/sdc3 mdadm: layout defaults to left-symmetric mdadm: size set to 1052160K mdadm: array /dev/md5 started. nestor@nestor-desktop:~$ mdadm -D /dev/md5 mdadm: cannot open /dev/md5: Permission denied nestor@nestor-desktop:~$ sudo mdadm -D /dev/md5 /dev/md5: Version : 00.90.03 Creation Time : Sun Aug 7 05:04:38 2011 Raid Level : raid5 Array Size : 2104320 （2.01 GiB 2.15 GB） Used Dev Size : 1052160 （1027.67 MiB 1077.41 MB） Raid Devices : 3 Total Devices : 4 Preferred Minor : 5 Persistence : Superblock is persistent Update Time : Sun Aug 7 05:05:08 2011 State : clean Active Devices : 3 Working Devices : 4 Failed Devices : 0 Spare Devices : 1 Layout : left-symmetric Chunk Size : 128K UUID : b14234b7:8b18c28b:e896b948:8bdba58f （local to host nestor-desktop） Events : 0.4 Number Major Minor RaidDevice State 0 8 51 0 active sync /dev/sdd3 1 8 67 1 active sync /dev/sde3 2 8 83 2 active sync /dev/sdf3 3 8 35 - spare /dev/sdc3 nestor@nestor-desktop:~$ mkfs.ext3 /dev/md5 mke2fs 1.40.8 （13-Mar-2008） mkfs.ext3: Permission denied while trying to determine filesystem size nestor@nestor-desktop:~$ sudo mkfs.ext3 /dev/md5 mke2fs 1.40.8 （13-Mar-2008） Filesystem label= OS type: Linux Block size=4096 （log=2） Fragment size=4096 （log=2） 131648 inodes, 526080 blocks 26304 blocks （5.00%） reserved for the super user First data block=0 Maximum filesystem blocks=541065216 17 block groups 32768 blocks per group, 32768 fragments per group 7744 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912 Writing inode tables: done Creating journal （16384 blocks）: done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 24 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. nestor@nestor-desktop:~$ sudo mkdir /raid5disk nestor@nestor-desktop:~$ mount /dev/md5 /raid5disk mount: only root can do that nestor@nestor-desktop:~$ sudo mount /dev/md5 /raid5disk nestor@nestor-desktop:~$ sudo gedit /etc/fstat nestor@nestor-desktop:~$ sudo gedit /etc/fstab q nestor@nestor-desktop:~$ nestor@nestor-desktop:~$ q nestor@nestor-desktop:~$ sudo mdadm /dev/md5 -f /dev/sdd3 mdadm: set /dev/sdd3 faulty in /dev/md5 nestor@nestor-desktop:~$ mdadm -D /dev/md5 mdadm: cannot open /dev/md5: Permission denied nestor@nestor-desktop:~$ sudo mdadm -D /dev/md5 /dev/md5: Version : 00.90.03 Creation Time : Sun Aug 7 05:04:38 2011 Raid Level : raid5 Array Size : 2104320 （2.01 GiB 2.15 GB） Used Dev Size : 1052160 （1027.67 MiB 1077.41 MB） Raid Devices : 3 Total Devices : 4 Preferred Minor : 5 Persistence : Superblock is persistent Update Time : Sun Aug 7 05:16:53 2011 State : clean, degraded, recovering Active Devices : 2 Working Devices : 3 Failed Devices : 1 Spare Devices : 1 Layout : left-symmetric Chunk Size : 128K Rebuild Status : 80% complete UUID : b14234b7:8b18c28b:e896b948:8bdba58f （local to host nestor-desktop） Events : 0.6 Number Major Minor RaidDevice State 3 8 35 0 spare rebuilding /dev/sdc3 1 8 67 1 active sync /dev/sde3 2 8 83 2 active sync /dev/sdf3 4 8 51 - faulty spare /dev/sdd3 将这些设备加入/etc/fstab启动项： /dev/md0 /raid0disk auto defaults 0 0 /dev/md1 /raid1disk auto defaults 0 0 /dev/md5 /raid5disk auto defaults 0 0 |
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