RHCE60LVMWord文档格式.docx
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sstronglyrecommendedto
switchoffthemode（command'
c'
）andchangedisplayunitsto
sectors（command'
u'
）.
Command（mforhelp）:
n
Firstcylinder（12774-38914,default12774）:
Usingdefaultvalue12774
Firstcylinder（13285-38914,default13285）:
Usingdefaultvalue13285
Lastcylinder,+cylindersor+size{K,M,G}（13285-38914,default38914）:
+50G
Firstcylinder（19813-38914,default19813）:
Usingdefaultvalue19813
Lastcylinder,+cylindersor+size{K,M,G}（19813-38914,default38914）:
p
/dev/sda612774127741299+83Linux
/dev/sda7132851981252435986+83Linux
/dev/sda8198132634052436128+83Linux
Partitiontableentriesarenotindiskorder
w
Thepartitiontablehasbeenaltered!
Callingioctl（）tore-readpartitiontable.
Re-readingthepartitiontablefailedwitherror16:
Deviceorresourcebusy.
Thekernelstillusestheoldtable.Thenewtablewillbeusedat
thenextrebootorafteryourunpartprobe（8）orkpartx（8）
Syncingdisks.
[root@server~]#reboot创建两个50G的分区
[root@server~]#pvcreate/dev/sda7/dev/sda8将两个50G的分区做成物理卷
Physicalvolume"
/dev/sda7"
successfullycreated
/dev/sda8"
[root@server~]#pvdisplay
"
isanewphysicalvolumeof"
50.01GiB"
---NEWPhysicalvolume---
PVName/dev/sda7
VGName
PVSize50.01GiB
AllocatableNO
PESize0
TotalPE0
FreePE0
AllocatedPE0
PVUUIDxY7aMh-iOta-LwkC-IAYA-iMw4-gyP4-bFMEYH
PVName/dev/sda8
PVUUIDMmRgF0-3oj3-HJjZ-re2r-IML2-JDRj-aM6DMD
[root@server~]#vgcreatemy_vg/dev/sda7/dev/sda8将物理卷做成卷组
Volumegroup"
my_vg"
[root@server~]#vgdisplay
---Volumegroup---
VGNamemy_vg
SystemID
Formatlvm2
MetadataAreas2
MetadataSequenceNo1
VGAccessread/write
VGStatusresizable
MAXLV0
CurLV0
OpenLV0
MaxPV0
CurPV2
ActPV2
VGSize100.01GiB
PESize4.00MiB
TotalPE25602
AllocPE/Size0/0
FreePE/Size25602/100.01GiB
VGUUIDErZsD4-C11F-10bB-35f4-ZUOx-m4fF-RXPIA0
[root@server~]#lvcreate-L50G-nmy-lvmy_vg在100G的卷组中创建50G的逻辑卷
Logicalvolume"
my-lv"
created
[root@server~]#lvdisplay
---Logicalvolume---
LVName/dev/my_vg/my-lv
LVUUIDpMi0bA-jQT2-rk8x-LHRI-8s6m-mPKK-8OcVDb
LVWriteAccessread/write
LVStatusavailable
#open0
LVSize50.00GiB
CurrentLE12800
Segments1
Allocationinherit
Readaheadsectorsauto
-currentlysetto256
Blockdevice253:
[root@server~]#mkfs.ext4/dev/my_vg/my-lv格式化逻辑卷
mke2fs1.41.12（17-May-2010）
Filesystemlabel=
OStype:
Linux
Blocksize=4096（log=2）
Fragmentsize=4096（log=2）
Stride=0blocks,Stripewidth=0blocks
3276800inodes,13107200blocks
655360blocks（5.00%）reservedforthesuperuser
Firstdatablock=0
Maximumfilesystemblocks=0
400blockgroups
32768blockspergroup,32768fragmentspergroup
8192inodespergroup
Superblockbackupsstoredonblocks:
32768,98304,163840,229376,294912,819200,884736,1605632,2654208,
4096000,7962624,11239424
Writinginodetables:
done
Creatingjournal（32768blocks）:
done
Writingsuperblocksandfilesystemaccountinginformation:
Thisfilesystemwillbeautomaticallycheckedevery21mountsor
180days,whichevercomesfirst.Usetune2fs-cor-itooverride.
[root@servermy-lv]#df
FilesystemSizeUsedAvailUse%Mountedon
/dev/sda249G10G36G22%/
tmpfs500M88K500M1%/dev/shm
/dev/sda1194M26M159M14%/boot
/dev/sda349G469M46G2%/var
/dev/mapper/my_vg-my--lv
50G180M47G1%/mnt/my-lv
[root@servermy-lv]#lvextend-L+50G/dev/my_vg/my-lv给逻辑卷增加50G空间
Extendinglogicalvolumemy-lvto100.00GiB
Logicalvolumemy-lvsuccessfullyresized
[root@servermy-lv]#resize2fs/dev/my_vg/my-lv调整逻辑卷大小
resize2fs1.41.12（17-May-2010）
Filesystemat/dev/my_vg/my-lvismountedon/mnt/my-lv;
on-lineresizingrequired
olddesc_blocks=4,new_desc_blocks=7
Performinganon-lineresizeof/dev/my_vg/my-lvto26214400（4k）blocks.
Thefilesystemon/dev/my_vg/my-lvisnow26214400blockslong.
99G188M94G1%/mnt/my-lv
[root@servermy-lv]#lvdisplay
#open1
LVSize100.00GiB当前大小为100G
CurrentLE25600
Segments2
[root@servermy-lv]#ls逻辑卷中有一个文件
1lost+found
[root@server~]#umount/mnt/my-lv/
[root@server~]#e2fsck-f/dev/my_vg/my-lv需要先检查逻辑卷
e2fsck1.41.12（17-May-2010）
Pass1:
Checkinginodes,blocks,andsizes
Pass2:
Checkingdirectorystructure
Pass3:
Checkingdirectoryconnectivity
Pass4:
Checkingreferencecounts
Pass5:
Checkinggroupsummaryinformation
/dev/my_vg/my-lv:
11/6553600files（0.0%non-contiguous）,459349/26214400blocks
[root@server~]#resize2fs/dev/my_vg/my-lv95G调整逻辑卷大小为95G
Resizingthefilesystemon/dev/my_vg/my-lvto24903680（4k）blocks.
Thefilesystemon/dev/my_vg/my-lvisnow24903680blockslong.
[root@server~]#mount/dev/my_vg/my-lv/mnt/my-lv/
[root@server~]#df
/dev/sda249G11G36G22%/
/dev/sda349G480M46G2%/var
94G188M89G1%/mnt/my-lv减小5G
[root@server~]#lvdisplay
LVSize100.00GiB仍然为100G
[root@server~]#lvresize-L95G/dev/my_vg/my-lv减小5G空间不先做resize2fs而直接运行
WARNING:
Reducingactivelogicalvolumeto95.00GiBlvresize会导致无法重新挂
THISMAYDESTROYYOURDATA（filesystemetc.）载，需要格式化，数据丢失
Doyoureallywanttoreducemy-lv?
[y/n]:
y
Reducinglogicalvolumemy-lvto95.00GiB
94G188M89G1%/mnt/my-lv
LVSize95.00GiB已经减小
CurrentLE24320
Firstcylinder（26341-38914,default26341）:
Usingdefaultvalue26341
Lastcylinder,+cylindersor+size{K,M,G}（26341-38914,default38914）:
[root@server~]#reboot新创建一个50G的分区，重启生效
MetadataSequenceNo13
CurLV1
OpenLV1
VGSize100.01GiB当前大小为100G
AllocPE/Size25600/100.00GiB
FreePE/Size2/8.00MiB
[root@server~]#vgextendmy_vg/dev/sda9把sda9加入vg中
Nophysicalvolumelabelread
升级会员 