linux配置软raid0过程（A）

[root@TSM54-Test ~]#
fdisk /dev/sdbThe number of cylinders for this disk is set to 1044.There is nothing wrong with that, but this is larger than 1024,and could in certain setups cause problems with:1) software that runs at boot time (e.g., old versions of LILO)2) booting and partitioning software from other OSs(e.g., DOS FDISK, OS/2 FDISK)Command (m for help): nCommand actione extendedp primary partition (1-4)pPartition number (1-4): 1First cylinder (1-1044, default 1):Using default value 1Last cylinder or +size or +sizeM or +sizeK (1-1044, default 1044):Using default value 1044Command (m for help): tSelected partition 1Hex code (type L to list codes): L0 Empty           1e Hidden W95 FAT1 80 Old Minix       be Solaris boot1 FAT12           24 NEC DOS         81 Minix / old Lin bf Solaris2 XENIX root      39 Plan 9          82 Linux swap / So c1 DRDOS/sec (FAT-3 XENIX usr       3c PartitionMagic 83 Linux           c4 DRDOS/sec (FAT-4 FAT16 <32M      40 Venix 80286     84 OS/2 hidden C: c6 DRDOS/sec (FAT-5 Extended        41 PPC PReP Boot   85 Linux extended c7 Syrinx6 FAT16           42 SFS             86 NTFS volume set da Non-FS data7 HPFS/NTFS       4d QNX4.x          87 NTFS volume set db CP/M / CTOS / .8 AIX             4e QNX4.x 2nd part 88 Linux plaintext de Dell Utility9 AIX bootable    4f QNX4.x 3rd part 8e Linux LVM       df BootIta OS/2 Boot Manag 50 OnTrack DM      93 Amoeba          e1 DOS accessb W95 FAT32       51 OnTrack DM6 Aux 94 Amoeba BBT      e3 DOS R/Oc W95 FAT32 (LBA) 52 CP/M            9f BSD/OS          e4 SpeedStore W95 FAT16 (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpad hi eb BeOS fsf W95 Ext'd (LBA) 54 OnTrackDM6      a5 FreeBSD         ee EFI GPT10 OPUS            55 EZ-Drive        a6 OpenBSD         ef EFI (FAT-12/16/11 Hidden FAT12    56 Golden Bow      a7 NeXTSTEP        f0 Linux/PA-RISC b12 Compaq diagnost 5c Priam Edisk     a8 Darwin UFS      f1 SpeedStor14 Hidden FAT16 <3 61 SpeedStor       a9 NetBSD          f4 SpeedStor16 Hidden FAT16    63 GNU HURD or Sys ab Darwin boot     f2 DOS secondary17 Hidden HPFS/NTF 64 Novell Netware b7 BSDI fs         fd Linux raid auto18 AST SmartSleep 65 Novell Netware b8 BSDI swap       fe LANstep1b Hidden W95 FAT3 70 DiskSecure Mult bb Boot Wizard hid ff BBT1c Hidden W95 FAT3 75 PC/IX

Hex code (type L to list codes):
fdChanged system type of partition 1 to fd (Linux raid autodetect)

Command (m for help):
p

Disk /dev/sdb: 8589 MB, 8589934592 bytes255 heads, 63 sectors/track, 1044 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id System/dev/sdb1               1        1044     8385898+ fd Linux raid autodetect

Command (m for help): wThe partition table has been altered!

Calling ioctl() to re-read partition table.Syncing disks.

[root@TSM54-Test ~]# fdisk -lDisk /dev/sda: 15.0 GB, 15032385536 bytes255 heads, 63 sectors/track, 1827 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesDevice Boot Start End Blocks Id System/dev/sda1 * 1 13 104391 83 Linux/dev/sda2 14 1827 14570955 8e Linux LVMDisk /dev/sdb: 8589 MB, 8589934592 bytes255 heads, 63 sectors/track, 1044 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesDevice Boot Start End Blocks Id System/dev/sdb1 1 1044 8385898+ fd Linux raid autodetectDisk /dev/sdc: 8589 MB, 8589934592 bytes255 heads, 63 sectors/track, 1044 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesDevice Boot Start End Blocks Id System

/dev/sdc1 1 1044 8385898+ fd Linux raid autodetectDisk /dev/sdd: 8589 MB, 8589934592 bytes255 heads, 63 sectors/track, 1044 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesDevice Boot Start End Blocks Id System/dev/sdd1 1 1044 8385898+ fd Linux raid autodetectDisk /dev/sde: 8589 MB, 8589934592 bytes255 heads, 63 sectors/track, 1044 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesDevice Boot Start End Blocks Id System

[root@TSM54-Test ~]# mdadm --create /dev/md0 --level=5 --raid-devices=3 /dev/sdb /dev/sdc /dev/sddmdadm: array /dev/md0 started.

[root@TSM54-Test ~]#cp /usr/share/doc/mdadm-2.5.4/mdadm.conf-example /etc/mdadm.conf[root@TSM54-Test ~]#echo DEVICE /dev/sd[bcd]1 >>/etc/mdadm.conf[root@TSM54-Test ~]#mdadm -Ds >>/etc/mdadm.conf

[root@TSM54-Test ~]# mkfs.ext3 /dev/md0mke2fs 1.39 (29-May-2006)Filesystem label=OS type: LinuxBlock size=4096 (log=2)Fragment size=4096 (log=2)2097152 inodes, 4194272 blocks209713 blocks (5.00%) reserved for the super userFirst data block=0Maximum filesystem blocks=0128 block groups32768 blocks per group, 32768 fragments per group16384 inodes per groupSuperblock backups stored on blocks:32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,4096000Writing inode tables: doneCreating journal (32768 blocks): doneWriting superblocks and filesystem accounting information: doneThis filesystem will be automatically checked every 36 mounts
or180 days, whichever comes first. Use tune2fs -c
or -i to override.[root@TSM54-Test ~]# mkdir /mnt/software[root@TSM54-Test ~]# mount /dev/md0 /mnt/software

/dev/md0 /mnt/software ext3 defaults 0 0

#mdadm --detail /dev/md0#mdadm -D /dev/md0

#mdadm -S /dev/md0

#mdadm -A /dev/md0 /dev/sd[bcd]1启动指定的RAID，可以理解为将一个raid重新装配到系统中。如果在前面已经配置了/etc/mdadm.conf文件，可以使用：#mdadm -As /dev/md0

[root@TSM54-Test ~]# mdadm /dev/md0 --fail /dev/sdd --remove /dev/sddmdadm: set /dev/sdd faulty in /dev/md0mdadm: hot removed /dev/sdd[root@TSM54-Test ~]# mdadm -D /dev/md0/dev/md0:Version : 00.90.03Creation Time : Fri Aug 1 21:35:31 2008Raid Level : raid5Array Size : 16777088 (16.00 GiB 17.18 GB)Device Size : 8388544 (8.00 GiB 8.59 GB)Raid Devices : 3Total Devices : 2Preferred Minor : 0Persistence : Superblock is persistentUpdate Time : Fri Aug 1 23:34:12 2008State : clean, degradedActive Devices : 2Working Devices : 2Failed Devices : 0Spare Devices : 0Layout : left-symmetricChunk Size : 64KUUID : 28a22990:eac5c231:3fe907f1:1145e264Events : 0.6Number Major Minor RaidDevice State0 8 16 0 active sync /dev/sdb1 8 32 1 active sync /dev/sdc2 0 0 2 removed[root@TSM54-Test ~]# mdadm /dev/md0 --add /dev/sddmdadm: re-added /dev/sdd[root@TSM54-Test ~]# mdadm -D /dev/md0/dev/md0:Version : 00.90.03Creation Time : Fri Aug 1 21:35:31 2008Raid Level : raid5Array Size : 16777088 (16.00 GiB 17.18 GB)Device Size : 8388544 (8.00 GiB 8.59 GB)Raid Devices : 3Total Devices : 3Preferred Minor : 0Persistence : Superblock is persistentUpdate Time : Fri Aug 1 23:34:12 2008State : clean, degraded, recoveringActive Devices : 2Working Devices : 3Failed Devices : 0Spare Devices : 1Layout : left-symmetricChunk Size : 64KRebuild Status : 0% completeUUID : 28a22990:eac5c231:3fe907f1:1145e264Events : 0.6Number Major Minor RaidDevice State0 8 16 0 active sync /dev/sdb1 8 32 1 active sync /dev/sdc2 8 48 2 spare rebuilding /dev/sdd

# nohup mdadm --monitor --mail root --delay 200 /dev/md0 &

#mdadm --create --verbose /dev/md0 --level=3 --raid-devices=3 -x1 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1

#mdadm -S /dev/md0或#rm /dev/md0删除/etc/mdadm.conf文件；去除/etc/fstab文件中相关的行。最后，用fdisk对磁盘进行重新分区。

[root@TSM54-Test ~]# fdisk /dev/sdeThe number of cylinders for this disk is set to 1044.There is nothing wrong with that, but this is larger than 1024,and could in certain setups cause problems with:1) software that runs at boot time (e.g., old versions of LILO)2) booting and partitioning software from other OSs(e.g., DOS FDISK, OS/2 FDISK)Command (m for help): pDisk /dev/sde: 8589 MB, 8589934592 bytes255 heads, 63 sectors/track, 1044 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesDevice Boot Start End Blocks Id SystemCommand (m for help):
nCommand actione extendedp primary partition (1-4)pPartition number (1-4): 1First cylinder (1-1044, default 1):Using default value 1Last cylinder or +size
or +sizeM or +sizeK (1-1044, default 1044): +5000MCommand (m for help): nCommand actione extendedp primary partition (1-4)pPartition number (1-4): 2First cylinder (610-1044, default 610):Using default value 610Last cylinder or +size
or +sizeM or +sizeK (610-1044, default 1044):Using default value 1044Command (m for help):
pDisk /dev/sde: 8589 MB, 8589934592 bytes255 heads, 63 sectors/track, 1044 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesDevice Boot Start End Blocks Id System/dev/sde1 1 609 4891761 83 Linux/dev/sde2 610 1044 3494137+ 83 LinuxCommand (m for help): tPartition number (1-4): 1Hex code (type L to list codes):
fdChanged System type of partition 1 to fd (Linux raid autodetect)Command (m for help): tPartition number (1-4): 2Hex code (type L to list codes):
fdChanged System
type of partition 2 to fd (Linux raid autodetect)Command (m for help):
pDisk /dev/sde: 8589 MB, 8589934592 bytes255 heads, 63 sectors/track, 1044 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesDevice Boot Start End Blocks Id System

/dev/sde1 1 609 4891761 fd Linux raid autodetect/dev/sde2 610 1044 3494137+ fd Linux raid autodetectCommand (m for help): wThe partition table has beenCalling ioctl() to re-read partition table.Syncing disks.

[root@TSM54-Test dev]# cd /dev/[root@TSM54-Test dev]# ls -l md0brw-r----- 1 root disk 9, 0 Aug 1 21:58 md0[root@TSM54-Test dev]# mknod md1 b 9 1[root@TSM54-Test dev]# mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/sde1 /dev/sde2mdadm: largest drive (/dev/sde1) exceed size (3494016K) by more than 1%Continue creating array?
ymdadm: array /dev/md1 started.

[root@TSM54-Test dev]# mdadm -DsARRAY /dev/md0 level=raid5 num-devices=3 UUID=28a22990:eac5c231:3fe907f1:1145e264ARRAY /dev/md1 level=raid1 num-devices=2 UUID=57f24dd1:aed3606c:d467132e:a6b3a010

[root@TSM54-Test ~]# pvcreate /dev/md0Physical volume "/dev/md0" successfully created[root@TSM54-Test ~]# pvcreate /dev/md1Physical volume "/dev/md1" successfully created[root@TSM54-Test ~]# pvdisplay--- Physical volume ---PV Name /dev/sda2VG Name VolGroup00PV Size 13.90 GB / not usable 21.45 MBAllocatable yes (but full)PE Size (KByte) 32768Total PE 444Free PE 0Allocated PE 444PV UUID BntsgG-UJLv-agT2-lZ7C-dXY2-51FB-Jxd5tA--- NEW Physical volume ---PV Name /dev/md0VG NamePV Size 16.00 GBAllocatable NOPE Size (KByte) 0Total PE 0Free PE 0Allocated PE 0PV UUID GriJk2-wyfl-o0CI-NY7t-g75X-zIx3-FJHf1u--- NEW Physical volume ---PV Name /dev/md1VG NamePV Size 3.33 GBAllocatable NOPE Size (KByte) 0Total PE 0Free PE 0Allocated PE 0PV UUID SImCO1-RmvK-OgfZ-dCFZ-LJNC-8wun-Bd9qzS

[root@TSM54-Test ~]# vgcreate LVMonRaid /dev/md0 /dev/md1

Volume group "LVMonRaid" successfully created[root@TSM54-Test ~]# vgscanReading all physical volumes. This may take a while...Found volume group "VolGroup00" using metadata type lvm2Found volume group "LVMonRaid" using metadata type lvm2

[root@TSM54-Test ~]# lvcreate --size 5000M --name LogicLV1 LVMonRaidLogical volume "LogicLV1" created[root@TSM54-Test ~]# lvcreate --size 5000M --name LogicLV2 LVMonRaidLogical volume "LogicLV2" created[root@TSM54-Test ~]# lvscanACTIVE '/dev/VolGroup00/LogVol00' [12.88 GB] inheritACTIVE '/dev/VolGroup00/LogVol01' [1.00 GB] inheritACTIVE '/dev/LVMonRaid/LogicLV1' [4.88 GB] inheritACTIVE '/dev/LVMonRaid/LogicLV2' [4.88 GB] inherit

注：上面两条记录是装系统时默认创建的。