带来一篇CentOS根分区扩容*** media,Linux,空间

再见西城 发表于 2015-1-14 20:41:28

带来一篇CentOS根分区扩容***

欢迎大家来到仓酷云论坛！操纵情况：
#uname-a
Linuxlinuxidc2.6.32-358.18.1.el6.x86_64#1SMPWedAug2817:19:38UTC2013x86_64x86_64x86_64GNU/Linux
近况剖析：
体系有两个硬盘，第一个硬盘107G,“/”分区空间事先分区时只给了7.7G太小，空间即刻占完。如今体系有第二个硬盘sdb巨细为16GB，但愿把sdb的一切空间到场到“/”分区中，是其空间容量从7.7GB酿成7.7GB+16GB（约2.4GB）。（固然假如这里只要一个硬盘sda,有良多空间还没有利用能够举行一样的操纵）
操纵步调以下：
第一步、检察本机现有分区情形
#df-h
文件体系容量已用可用已用%%挂载点
/dev/mapper/VolGroup-lv_root
7.7G7.1G155M98%/
tmpfs3.9G296K3.9G1%/dev/shm
/dev/sda1485M64M396M14%/boot
/dev/sda383G350M79G1%/media
第二步、检察本机的磁盘情形
#fdisk-l

Disk/dev/sda:107.4GB,107374182400bytes
255heads,63sectors/track,13054cylinders
Units=cylindersof16065*512=8225280bytes
Sectorsize(logical/physical):512bytes/512bytes
I/Osize(minimum/optimal):512bytes/512bytes
Diskidentifier:0x000dc0ad

DeviceBootStartEndBlocksIdSystem
/dev/sda1*16451200083Linux
Partition1doesnotendoncylinderboundary.
/dev/sda2642089162641928eLinuxLVM
/dev/sda320901305488076362+83Linux

Disk/dev/mapper/VolGroup-lv_root:8325MB,8325693440bytes
255heads,63sectors/track,1012cylinders
Units=cylindersof16065*512=8225280bytes
Sectorsize(logical/physical):512bytes/512bytes
I/Osize(minimum/optimal):512bytes/512bytes
Diskidentifier:0x00000000

Disk/dev/mapper/VolGroup-lv_swap:8325MB,8325693440bytes
255heads,63sectors/track,1012cylinders
Units=cylindersof16065*512=8225280bytes
Sectorsize(logical/physical):512bytes/512bytes
I/Osize(minimum/optimal):512bytes/512bytes
Diskidentifier:0x00000000
注重：此时还没有在EXSI5.0中增加第二块硬盘
#
第三步、增加第二块硬盘

检察此时体系磁盘情形
root@linuxidc~]#fdisk-l

Disk/dev/sda:107.4GB,107374182400bytes
255heads,63sectors/track,13054cylinders
Units=cylindersof16065*512=8225280bytes
Sectorsize(logical/physical):512bytes/512bytes
I/Osize(minimum/optimal):512bytes/512bytes
Diskidentifier:0x000dc0ad

DeviceBootStartEndBlocksIdSystem
/dev/sda1*16451200083Linux
Partition1doesnotendoncylinderboundary.
/dev/sda2642089162641928eLinuxLVM
/dev/sda320901305488076362+83Linux

Disk/dev/sdb:17.2GB,17179869184bytes
255heads,63sectors/track,2088cylinders
Units=cylindersof16065*512=8225280bytes
Sectorsize(logical/physical):512bytes/512bytes
I/Osize(minimum/optimal):512bytes/512bytes
Diskidentifier:0x00000000

Disk/dev/mapper/VolGroup-lv_root:8325MB,8325693440bytes
255heads,63sectors/track,1012cylinders
Units=cylindersof16065*512=8225280bytes
Sectorsize(logical/physical):512bytes/512bytes
I/Osize(minimum/optimal):512bytes/512bytes
Diskidentifier:0x00000000

Disk/dev/mapper/VolGroup-lv_swap:8325MB,8325693440bytes
255heads,63sectors/track,1012cylinders
Units=cylindersof16065*512=8225280bytes
Sectorsize(logical/physical):512bytes/512bytes
I/Osize(minimum/optimal):512bytes/512bytes
Diskidentifier:0x00000000

能够看到我们新增加的硬盘sdb

#
第四步、对第二块硬盘sdb举行分区

#fdisk/dev/sdb
DevicecontainsneitheravalidDOSpartitiontable,norSun,SGIorOSFdisklabel
BuildinganewDOSdisklabelwithdiskidentifier0xfa4abbdc.
Changeswillremaininmemoryonly,untilyoudecidetowritethem.
Afterthat,ofcourse,thepreviouscontentwontberecoverable.

Warning:invalidflag0x0000ofpartitiontable4willbecorrectedbyw(rite)

WARNING:DOS-compatiblemodeisdeprecated.Itsstronglyrecommendedto
switchoffthemode(commandc)andchangedisplayunitsto
sectors(commandu).

Command(mforhelp):m
Commandaction
atoggleabootableflag
beditbsddisklabel
ctogglethedoscompatibilityflag
ddeleteapartition
llistknownpartitiontypes
mprintthismenu
naddanewpartition
ocreateanewemptyDOSpartitiontable
pprintthepartitiontable
qquitwithoutsavingchanges
screateanewemptySundisklabel
tchangeapartitionssystemid
uchangedisplay/entryunits
vverifythepartitiontable
wwritetabletodiskandexit
xextrafunctionality(expertsonly)

Command(mforhelp):n
Commandaction
eextended
pprimarypartition(1-4)
p
Partitionnumber(1-4):4
Firstcylinder(1-2088,default1):
Usingdefaultvalue1
Lastcylinder,+cylindersor+size{K,M,G}(1-2088,default2088):
Usingdefaultvalue2088

Command(mforhelp):w
Thepartitiontablehasbeenaltered!

Callingioctl()tore-readpartitiontable.
Syncingdisks.

申明：下面操纵对sdb硬盘举行了分区操纵，设为sdb4分区了（固然下面创建的主分区能够为1-4中的恣意一个，我这里选择的4）。

第五步、对新创建的sdb4分区举行格局

#mkfs.ext4/dev/sdb4
mke2fs1.41.12(17-May-2010)
文件体系标签=
操纵体系:Linux
块巨细=4096(log=2)
分块巨细=4096(log=2)
Stride=0blocks,Stripewidth=0blocks
1048576inodes,4192957blocks
209647blocks(5.00%)reservedforthesuperuser
第一个数据块=0
Maximumfilesystemblocks=4294967296
128blockgroups
32768blockspergroup,32768fragmentspergroup
8192inodespergroup
Superblockbackupsstoredonblocks:
32768,98304,163840,229376,294912,819200,884736,1605632,2654208,
4096000

正在写进inode表:完成
Creatingjournal(32768blocks):完成
Writingsuperblocksandfilesystemaccountinginformation:done完成

Thisfilesystemwillbeautomaticallycheckedevery20mountsor
180days,whichevercomesfirst.Usetune2fs-cor-itooverride.

申明：将sdb4分区格局化为ext4格局，由于CentOS装置是体系的格局ext4，以是这里要注重一下。

第六步、格局后的sdb4分区增加为物理卷
#pvcreate/dev/sdb4
Physicalvolume"/dev/sdb4"successfullycreated

第七步、检察以后体系的物理卷（PV）情形

#pvdisplay
---Physicalvolume---
PVName/dev/sda2
VGNameVolGroup
PVSize15.51GiB/notusable3.00MiB
Allocatableyes(butfull)
PESize4.00MiB
TotalPE3970
FreePE0
AllocatedPE3970
PVUUIDUp77sG-sNKf-Ja0k-crBf-N0wz-a5hy-T6sVFh

"/dev/sdb4"isanewphysicalvolumeof"15.99GiB"
---NEWPhysicalvolume---
PVName/dev/sdb4
VGName
PVSize15.99GiB
AllocatableNO
PESize0
TotalPE0
FreePE0
AllocatedPE0
PVUUIDGqnw7N-HooX-S2Nz-1NIZ-YpOe-g0jo-grG1rQ
申明：能够看到增加的新物理卷sdb4，巨细都切合我们增加时的设置

第八步、检察以后卷组情形
#vgdisplay
---Volumegroup---
VGNameVolGroup
SystemID
Formatlvm2
MetadataAreas1
MetadataSequenceNo3
VGAccessread/write
VGStatusresizable
MAXLV0
CurLV2
OpenLV2
MaxPV0
CurPV1
ActPV1
VGSize15.51GiB
PESize4.00MiB
TotalPE3970
AllocPE/Size3970/15.51GiB
FreePE/Size0/0
VGUUIDPPrifh-glzl-nnxX-YkBm-xJ1s-rgnw-d1WsJd

第九步、将分区sdb4转换为扩大分区

#vgextendVolGroup/dev/sdb4
Volumegroup"VolGroup"successfullyextended

第十步、检察以后的逻辑卷

#lvdisplay
---Logicalvolume---
LVPath/dev/VolGroup/lv_root
LVNamelv_root
VGNameVolGroup
LVUUIDdCIsej-0NWX-bVFe-bT6L-c4eY-oy4G-9lNBOC
LVWriteAccessread/write
LVCreationhost,time,
LVStatusavailable
#open1
LVSize7.75GiB
CurrentLE1985
Segments1
Allocationinherit
Readaheadsectorsauto
-currentlysetto256
Blockdevice253:0

---Logicalvolume---
LVPath/dev/VolGroup/lv_swap
LVNamelv_swap
VGNameVolGroup
LVUUIDK5bxJo-2SmM-6NCU-mBJP-Qzp1-ZODH-nbLK0k
LVWriteAccessread/write
LVCreationhost,time,
LVStatusavailable
#open1
LVSize7.75GiB
CurrentLE1985
Segments1
Allocationinherit
Readaheadsectorsauto
-currentlysetto256
Blockdevice253:1

申明：这里能够看到“/”根分区的路径称号为：/dev/VolGroup/lv_root

第十一步、检察扩大后的卷组情形
#vgdisplay
---Volumegroup---
VGNameVolGroup
SystemID
Formatlvm2
MetadataAreas2
MetadataSequenceNo4
VGAccessread/write
VGStatusresizable
MAXLV0
CurLV2
OpenLV2
MaxPV0
CurPV2
ActPV2
VGSize31.50GiB
PESize4.00MiB
TotalPE8064
AllocPE/Size3970/15.51GiB
FreePE/Size4094/15.99GiB
VGUUIDPPrifh-glzl-nnxX-YkBm-xJ1s-rgnw-d1WsJd
申明：扩大后的卷子情形，能够看出巨细增添了16GB（与第八步中的对照）

第十二步、将新增的逻辑卷全体扩大到“/”分区中

#lvextend-L+15.99G/dev/VolGroup/lv_root
Roundingsizetoboundarybetweenphysicalextents:15.99GiB
Extendinglogicalvolumelv_rootto23.75GiB
Logicalvolumelv_rootsuccessfullyresized

申明：这里sdb4统共有16G，以是把16BG全体增加给根分区。

第十三步、检察“/”根分区格局，偏重新革新根分区的巨细
#e2fsck-f/dev/VolGroup/lv_root
e2fsck1.41.12(17-May-2010)
/dev/VolGroup/lv_rootismounted.
e2fsck:没法持续,中断.

#resize2fs/dev/VolGroup/lv_root
resize2fs1.41.12(17-May-2010)
Filesystemat/dev/VolGroup/lv_rootismountedon/;on-lineresizingrequired
olddesc_blocks=1,new_desc_blocks=2
Performinganon-lineresizeof/dev/VolGroup/lv_rootto6224896(4k)blocks.
Thefilesystemon/dev/VolGroup/lv_rootisnow6224896blockslong.
申明：下令resize2fs即革新根分区“/dev/VolGroup/lv_root”的容量。

第十三步、检察革新后根分区的巨细

#df-h
文件体系容量已用可用已用%%挂载点
/dev/mapper/VolGroup-lv_root
24G7.1G16G32%/
tmpfs3.9G144K3.9G1%/dev/shm
/dev/sda383G350M79G1%/media/Lucene

申明：能够看到根分区的巨细有7.7G酿成了24G，重启一下体系再来看情形。此时就能够持续装置软件了，不会提醒空间不敷了。
如果您觉得本篇CentOSLinux教程讲得好，请记得点击右边漂浮的分享程序，把好文章分享给你的好朋友们！

活着的死人 发表于 2015-1-16 21:18:56