使用MegaCli在线创建RAID
首先使用命令查看物理硬盘的状态信息
/opt/MegaRAID/MegaCli/MegaCli64 -PDList -aALL
记住新增加的硬盘的Enclosure Device ID和Slot Number
例如：
Enclosure Device ID: 32
Slot Number: 3
同时查看Foreign State值是否为None
如果状态为Foreign State: Foreign需要执行如下命令确认下
/opt/MegaRAID/MegaCli/MegaCli64 -CfgForeign -Scan -a0
显示：
There are 2 foreign configuration(s) on controller 0.
然后需要将Foreing状态清除掉
/opt/MegaRAID/MegaCli/MegaCli64 -CfgForeign -Clear -a0
重新运行命令查看物理硬盘状态，确认Foreign State为None
然后就可以创建RAID了，这里示例创建RAID 1
/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r1 [32:2,32:3] WB Direct -a0
创建成功会显示：
Adapter 0: Created VD 1
Adapter 0: Configured the Adapter!!
这时执行命令查看raid的信息
/opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -Lall -aALL
能看到一个新的Virtual Drive信息：
Virtual Drive: 1 (Target Id: 1)
Name :Virtual Disk 1
RAID Level : Primary-1, Secondary-0, RAID Level Qualifier-0
Size : 931.0 GB
Sector Size : 512
Mirror Data : 931.0 GB
State : Optimal
Strip Size : 64 KB
Number Of Drives : 2
Span Depth : 1
Default Cache Policy: WriteThrough, ReadAheadNone, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAheadNone, Direct, No Write Cache if Bad BBU
Default Access Policy: Read/Write
Current Access Policy: Read/Write
Disk Cache Policy : Disk Default
Encryption Type : None
Default Power Savings Policy: Controller Defined
Current Power Savings Policy: None
Can spin up in 1 minute: Yes
LD has drives that support T10 power conditions: Yes
LDs IO profile supports MAX power savings with cached writes: No
Bad Blocks Exist: No
Is VD Cached: No
执行lsblk
能看到一块新的硬盘sdb
至此创建新RAID完成
对新增加的硬盘分区
fdisk /dev/sdb
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
后面两项直接回车使用整个硬盘所有空间
然后修改分区格式为LVM分区
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
创建新pv ：
pvcreate /dev/sdb1
Physical volume “/dev/sdb1” successfully created
查看原有虚拟卷组的信息
vgdisplay
--- Volume group ---
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 7
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 4
Open LV 4
Max PV 0
Cur PV 1
Act PV 1
VG Size 237.86 GiB
PE Size 4.00 MiB
Total PE 60891
Alloc PE / Size 60000 / 234.38 GiB
Free PE / Size 891 / 3.48 GiB
VG UUID UDad6V-j7j9-36SR-R5jR-EhLy-ofsS-lGUZdO
可以看到原本剩余的空间已很少了
对虚拟卷组扩容
vgextend VolGroup00 /dev/sdb1
Volume group “VolGroup00” successfully extended
再次查看vgdisplay
--- Volume group ---
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 8
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 4
Open LV 4
Max PV 0
Cur PV 2
Act PV 2
VG Size 1.14 TiB
PE Size 4.00 MiB
Total PE 299226
Alloc PE / Size 60000 / 234.38 GiB
Free PE / Size 239226 / 934.48 GiB
VG UUID UDad6V-j7j9-36SR-R5jR-EhLy-ofsS-lGUZdO
可以看到空闲的空间已经增加了
然后就可以对原本空间不足的逻辑卷扩容了
如下命令是对var分区的卷组新增加100G空间
lvextend -L +100G /dev/VolGroup00/varvol
Extending logical volume varvol to 197.66 GiB Logical volume varvol successfully resized
然后运行 resize2fs /dev/VolGroup00/varvol 在线调整文件系统
完成后df -h 就能看到var分区新增了100G大小了
另外一种服务器上的简单raid卡创建raid方法
这种raid卡只支持Raid0和Raid1，工具也很简单，交互式操作，直接贴一份命令行操作的过程记录，红色标记的是需要我们输入的地方—>
./lsiutil.x86_64 —>运行工具
LSI Logic MPT Configuration Utility, Version 1.62, January 14, 2009
1 MPT Port found
Port Name Chip Vendor/Type/Rev MPT Rev Firmware Rev IOC
1. /proc/mpt/ioc0 LSI Logic SAS1068E B3 105 00192f00 0
Select a device: [1-1 or 0 to quit] 1 ---> 这里列出了服务器上raid卡，只有一块，所以直接输入1
1. Identify firmware, BIOS, and/or FCode
2. Download firmware (update the FLASH)
4. Download/erase BIOS and/or FCode (update the FLASH)
8. Scan for devices
10. Change IOC settings (interrupt coalescing)
13. Change SAS IO Unit settings
16. Display attached devices
20. Diagnostics
21. RAID actions
22. Reset bus
23. Reset target
42. Display operating system names for devices
45. Concatenate SAS firmware and NVDATA files
59. Dump PCI config space
60. Show non-default settings
61. Restore default settings
66. Show SAS discovery errors
69. Show board manufacturing information
97. Reset SAS link, HARD RESET
98. Reset SAS link
99. Reset port
e Enable expert mode in menus
p Enable paged mode
w Enable logging
Main menu, select an option: [1-99 or e/p/w or 0 to quit] 8 ---> 我们先扫描一下，看看新加的硬盘是否都识别到了
SAS1068E links are 3.0 G, 3.0 G, 3.0 G, 3.0 G, off, off, off, off
B___T___L Type Vendor Product Rev SASAddress PhyNum
0 1 0 Disk Dell VIRTUAL DISK 1028
0 2 0 Disk SEAGATE ST1000NM0023 GS10 5000c50084278645 2 ---> 两块新硬盘都列出来了
0 3 0 Disk SEAGATE ST1000NM0023 GS10 5000c50084279871 3
0 8 0 EnclServ DP BACKPLANE 1.07 5882b0b013553f00 8
Hidden RAID Devices:
B___T Device Vendor Product Rev SASAddress PhyNum
0 9 PhysDisk 0 SEAGATE ST3300657SS ES64 5000c500289afa69 1
0 0 PhysDisk 1 SEAGATE ST3300657SS ES64 5000c50028df2b41 0
Main menu, select an option: [1-99 or e/p/w or 0 to quit] 21 ---> 进入raid操作菜单
1. Show volumes
2. Show physical disks
3. Get volume state
4. Wait for volume resync to complete
23. Replace physical disk
26. Disable drive firmware update mode
27. Enable drive firmware update mode
30. Create volume
31. Delete volume
32. Change volume settings
33. Change volume name
50. Create hot spare
51. Delete hot spare
99. Reset port
e Enable expert mode in menus
p Enable paged mode
w Enable logging
RAID actions menu, select an option: [1-99 or e/p/w or 0 to quit] 30 ---> 创建新的卷
B___T___L Type Vendor Product Rev Disk Blocks Disk MB
1. 0 2 0 Disk SEAGATE ST1000NM0023 GS10 1953525168 953869
2. 0 3 0 Disk SEAGATE ST1000NM0023 GS10 1953525168 953869
To create a volume, select 2 or more of the available targets
select 3 to 10 targets for a mirrored volume
select 2 to 10 targets for a striped volume
Select a target: [1-2 or RETURN to quit] 1 ---> 因为我们要两块硬盘做raid1 ，所以这里分别输入1，2选择列出的两块新加的硬盘
Select a target: [1-2 or RETURN to quit] 2
2 physical disks were created
Select volume type: [0=Mirroring, 1=Striping, default is 0] 0 ---> 这里选择0是做镜像，也就是raid 1
Required metadata size is 512 MB, plus 2 MB
Select volume size: [1 to 953338 MB, default is 953338] ---> 这里都默认，直接回车即可
Enable write caching: [Yes or No, default is Yes]
Zero the first and last blocks of the volume? [Yes or No, default is No]
Skip initial volume resync? [Yes or No, default is No]
Volume was created ---> 到这里，新的raid1就创建完成了
RAID actions menu, select an option: [1-99 or e/p/w or 0 to quit] 1 ---> 我们再查看一下现在的raid卷
2 volumes are active, 4 physical disks are active ---> 可以看到列出了两个卷，第二个Volume 1就是我们新加的卷
Volume 0 is Bus 0 Target 1, Type IM (Integrated Mirroring)
Volume Name:
Volume WWID: 0c3de93603fd6e58
Volume State: optimal, enabled
Volume Settings: write caching enabled, auto configure, priority resync
Volume draws from Hot Spare Pools: 0
Volume Size 285568 MB, 2 Members
Primary is PhysDisk 1 (Bus 0 Target 0)
Secondary is PhysDisk 0 (Bus 0 Target 9)
Volume 1 is Bus 0 Target 2, Type IM (Integrated Mirroring)
Volume Name:
Volume WWID: 06fe97cc153db8c2
Volume State: degraded, enabled, resync in progress
Volume Settings: write caching enabled, auto configure, priority resync
Volume Size 953338 MB, 2 Members
Primary is PhysDisk 2 (Bus 0 Target 10)
Secondary is PhysDisk 3 (Bus 0 Target 3)
RAID actions menu, select an option: [1-99 or e/p/w or 0 to quit] 3 ---> 再查看一下卷的状态
Volume 0 is Bus 0 Target 1, Type IM (Integrated Mirroring)
Volume 1 is Bus 0 Target 2, Type IM (Integrated Mirroring)
Volume: [0-1 or RETURN to quit] 1 ---> 选1，也就是我们刚刚创建的卷
Volume 1 State: degraded, enabled, resync in progress
Resync Progress: total blocks 1952436224, blocks remaining 1952199736, 99% ---> 看到卷的状态是正在初始化同步，等到这个99%变成0，卷的状态变成optimal, enabled就是正常可用状态了
RAID actions menu, select an option: [1-99 or e/p/w or 0 to quit] 0 ---> 退出
Main menu, select an option: [1-99 or e/p/w or 0 to quit] 0 ---> 退出
Port Name Chip Vendor/Type/Rev MPT Rev Firmware Rev IOC
1. /proc/mpt/ioc0 LSI Logic SAS1068E B3 105 00192f00 0
Select a device: [1-1 or 0 to quit] 0 ---> 退出
待raid卷状态到正常可用状态后，再按照上面说的lvm扩容的方式操作即可