#查看新增加的磁盤

[root@centos002?~]#?fdisk?-l

Disk?/dev/sda:?21.5?GB,?21474836480?bytes

255?heads,?63?sectors/track,?2610?cylinders

Units?=?cylinders?of?16065?*?512?=?8225280?bytes

Sector?size?(logical/physical):?512?bytes?/?512?bytes

I/O?size?(minimum/optimal):?512?bytes?/?512?bytes

Disk?identifier:?0x000c8b4b

Device?Boot??????Start?????????End??????Blocks???Id??System

/dev/sda1???*???????????1??????????64??????512000???83??Linux

Partition?1?does?not?end?on?cylinder?boundary.

/dev/sda2??????????????64????????2611????20458496???8e??Linux?LVM

Disk?/dev/sdb:?10.7?GB,?10737418240?bytes

255?heads,?63?sectors/track,?1305?cylinders

Units?=?cylinders?of?16065?*?512?=?8225280?bytes

Sector?size?(logical/physical):?512?bytes?/?512?bytes

I/O?size?(minimum/optimal):?512?bytes?/?512?bytes

Disk?identifier:?0x00000000

#新建分區

[root@centos002?~]#?fdisk?/dev/sdb

Device?contains?neither?a?valid?DOS?partition?table,?nor?Sun,?SGI?or?OSF?disklabel

Building?a?new?DOS?disklabel?with?disk?identifier?0x3ec1c9a6.

Changes?will?remain?in?memory?only,?until?you?decide?to?write?them.

After?that,?of?course,?the?previous?content?won't?be?recoverable.

Warning:?invalid?flag?0x0000?of?partition?table?4?will?be?corrected?by?w(rite)

WARNING:?DOS-compatible?mode?is?deprecated.?It's?strongly?recommended?to

switch?off?the?mode?(command?'c')?and?change?display?units?to

sectors?(command?'u').

Command?(m?for?help):?n

Command?action

e???extended

p???primary?partition?(1-4)

p

Partition?number?(1-4):?1

First?cylinder?(1-1305,?default?1):

Using?default?value?1

Last?cylinder,?+cylinders?or?+size{K,M,G}?(1-1305,?default?1305):

Using?default?value?1305

Command?(m?for?help):?w

The?partition?table?has?been?altered!

Calling?ioctl()?to?re-read?partition?table.

Syncing?disks.

#格式化分區

[root@centos002?~]#?mkfs.ext4?/dev/sdb1

mke2fs?1.41.12?(17-May-2010)

Filesystem?label=

OS?type:?Linux

Block?size=4096?(log=2)

Fragment?size=4096?(log=2)

Stride=0?blocks,?Stripe?width=0?blocks

655360?inodes,?2620595?blocks

131029?blocks?(5.00%)?reserved?for?the?super?user

First?data?block=0

Maximum?filesystem?blocks=2684354560

80?block?groups

32768?blocks?per?group,?32768?fragments?per?group

8192?inodes?per?group

Superblock?backups?stored?on?blocks:

32768,?98304,?163840,?229376,?294912,?819200,?884736,?1605632

Writing?inode?tables:?done

Creating?journal?(32768?blocks):?done

Writing?superblocks?and?filesystem?accounting?information:?done

This?filesystem?will?be?automatically?checked?every?26?mounts?or

180?days,?whichever?comes?first.??Use?tune2fs?-c?or?-i?to?override.

#將新建分區更改為支持LVM格式

[root@centos002?~]#?fdisk?/dev/sdb

WARNING:?DOS-compatible?mode?is?deprecated.?It's?strongly?recommended?to

switch?off?the?mode?(command?'c')?and?change?display?units?to

sectors?(command?'u').

Command?(m?for?help):?p

Disk?/dev/sdb:?10.7?GB,?10737418240?bytes

255?heads,?63?sectors/track,?1305?cylinders

Units?=?cylinders?of?16065?*?512?=?8225280?bytes

Sector?size?(logical/physical):?512?bytes?/?512?bytes

I/O?size?(minimum/optimal):?512?bytes?/?512?bytes

Disk?identifier:?0x3ec1c9a6

Device?Boot??????Start?????????End??????Blocks???Id??System

/dev/sdb1???????????????1????????1305????10482381???83??Linux

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.

#查看更改后的分區格式

[root@centos002?~]#?fdisk?-l

Disk?/dev/sda:?21.5?GB,?21474836480?bytes

255?heads,?63?sectors/track,?2610?cylinders

Units?=?cylinders?of?16065?*?512?=?8225280?bytes

Sector?size?(logical/physical):?512?bytes?/?512?bytes

I/O?size?(minimum/optimal):?512?bytes?/?512?bytes

Disk?identifier:?0x000c8b4b

Device?Boot??????Start?????????End??????Blocks???Id??System

/dev/sda1???*???????????1??????????64??????512000???83??Linux

Partition?1?does?not?end?on?cylinder?boundary.

/dev/sda2??????????????64????????2611????20458496???8e??Linux?LVM

Disk?/dev/sdb:?10.7?GB,?10737418240?bytes

255?heads,?63?sectors/track,?1305?cylinders

Units?=?cylinders?of?16065?*?512?=?8225280?bytes

Sector?size?(logical/physical):?512?bytes?/?512?bytes

I/O?size?(minimum/optimal):?512?bytes?/?512?bytes

Disk?identifier:?0x3ec1c9a6

Device?Boot??????Start?????????End??????Blocks???Id??System

/dev/sdb1???????????????1????????1305????10482381???8e??Linux?LVM

##查看VG

[root@centos002?~]#?vgdisplay

---?Volume?group?---

VG?Name???????????????vg_centos002

System?ID

Format????????????????lvm2

Metadata?Areas????????1

Metadata?Sequence?No??3

VG?Access?????????????read/write

VG?Status?????????????resizable

MAX?LV????????????????0

Cur?LV????????????????2

Open?LV???????????????2

Max?PV????????????????0

Cur?PV????????????????1

Act?PV????????????????1

VG?Size???????????????19.51?GiB

PE?Size???????????????4.00?MiB

Total?PE??????????????4994

Alloc?PE?/?Size???????4994?/?19.51?GiB

Free??PE?/?Size???????0?/?0

VG?UUID???????????????ugeSA9-XCNj-M5XK-Gz4d-DxoR-7TSv-X9Pq6O

#創建PV與查看

[root@centos002?~]#?pvcreate?/dev/sdb1

Physical?volume?"/dev/sdb1"?successfully?created

[root@centos002?~]#?pvdisplay

---?Physical?volume?---

PV?Name???????????????/dev/sda2

VG?Name???????????????vg_centos002

PV?Size???????????????19.51?GiB?/?not?usable?3.00?MiB

Allocatable???????????yes?(but?full)

PE?Size???????????????4.00?MiB

Total?PE??????????????4994

Free?PE???????????????0

Allocated?PE??????????4994

PV?UUID???????????????Z7AOVb-LEzI-su15-J5lC-alj8-a94k-1NmRRv

"/dev/sdb1"?is?a?new?physical?volume?of?"10.00?GiB"

---?NEW?Physical?volume?---

PV?Name???????????????/dev/sdb1

VG?Name

PV?Size???????????????10.00?GiB

Allocatable???????????NO

PE?Size???????????????0

Total?PE??????????????0

Free?PE???????????????0

Allocated?PE??????????0

PV?UUID???????????????4N37pw-Q59f-FRZE-glEx-lRWh-BY5O-Zk9JrF

#查看LV

[root@centos002?~]#?lvdisplay

---?Logical?volume?---

LV?Path????????????????/dev/vg_centos002/lv_root

LV?Name????????????????lv_root

VG?Name????????????????vg_centos002

LV?UUID????????????????2G4f2m-gkIR-xXG0-MCfO-jFO2-jYNC-IBKYqL

LV?Write?Access????????read/write

LV?Creation?host,?time?centos002,?2017-08-21?13:15:29?+0800

LV?Status??????????????available

#?open?????????????????1

LV?Size????????????????17.57?GiB

Current?LE?????????????4498

Segments???????????????1

Allocation?????????????inherit

Read?ahead?sectors?????auto

-?currently?set?to?????256

Block?device???????????253:0

---?Logical?volume?---

LV?Path????????????????/dev/vg_centos002/lv_swap

LV?Name????????????????lv_swap

VG?Name????????????????vg_centos002

LV?UUID????????????????ITJYHF-bGpM-z314-lW1B-q8gj-8tgl-8NZ4bM

LV?Write?Access????????read/write

LV?Creation?host,?time?centos002,?2017-08-21?13:15:34?+0800

LV?Status??????????????available

#?open?????????????????1

LV?Size????????????????1.94?GiB

Current?LE?????????????496

Segments???????????????1

Allocation?????????????inherit

Read?ahead?sectors?????auto

-?currently?set?to?????256

Block?device???????????253:1

#LVM擴容

[root@centos002?~]#?vgextend?vg_centos002?/dev/sdb1

Volume?group?"vg_centos002"?successfully?extended

[root@centos002?~]#?vgdisplay

---?Volume?group?---

VG?Name???????????????vg_centos002

System?ID

Format????????????????lvm2

Metadata?Areas????????2

Metadata?Sequence?No??4

VG?Access?????????????read/write

VG?Status?????????????resizable

MAX?LV????????????????0

Cur?LV????????????????2

Open?LV???????????????2

Max?PV????????????????0

Cur?PV????????????????2

Act?PV????????????????2

VG?Size???????????????29.50?GiB

PE?Size???????????????4.00?MiB

Total?PE??????????????7552

Alloc?PE?/?Size???????4994?/?19.51?GiB

Free??PE?/?Size???????2558?/?9.99?GiB

VG?UUID???????????????ugeSA9-XCNj-M5XK-Gz4d-DxoR-7TSv-X9Pq6O

#此時查看磁盤大小并沒有增加

[root@centos002?~]#?df?-h

Filesystem????????????Size??Used?Avail?Use%?Mounted?on

/dev/mapper/vg_centos002-lv_root

18G??803M???16G???5%?/

tmpfs?????????????????238M?????0??238M???0%?/dev/shm

/dev/sda1?????????????477M???28M??425M???7%?/boot

#擴展LVM分區大小

[root@centos002?~]#?lvextend?-L?28G?/dev/vg_centos002/lv_root

Insufficient?free?space:?2670?extents?needed,?but?only?2558?available

#報錯說明擴容的空間不足，需要調整值

[root@centos002?~]#?lvextend?-L?27G?/dev/vg_centos002/lv_root

Size?of?logical?volume?vg_centos002/lv_root?changed?from?17.57?GiB?(4498?extents)?to?27.00?GiB?(6912?extents).

Logical?volume?lv_root?successfully?resized.

[root@centos002?~]#?lvdisplay

---?Logical?volume?---

LV?Path????????????????/dev/vg_centos002/lv_root

LV?Name????????????????lv_root

VG?Name????????????????vg_centos002

LV?UUID????????????????2G4f2m-gkIR-xXG0-MCfO-jFO2-jYNC-IBKYqL

LV?Write?Access????????read/write

LV?Creation?host,?time?centos002,?2017-08-21?13:15:29?+0800

LV?Status??????????????available

#?open?????????????????1

LV?Size????????????????27.00?GiB

Current?LE?????????????6912

Segments???????????????2

Allocation?????????????inherit

Read?ahead?sectors?????auto

-?currently?set?to?????256

Block?device???????????253:0

---?Logical?volume?---

LV?Path????????????????/dev/vg_centos002/lv_swap

LV?Name????????????????lv_swap

VG?Name????????????????vg_centos002

LV?UUID????????????????ITJYHF-bGpM-z314-lW1B-q8gj-8tgl-8NZ4bM

LV?Write?Access????????read/write

LV?Creation?host,?time?centos002,?2017-08-21?13:15:34?+0800

LV?Status??????????????available

#?open?????????????????1

LV?Size????????????????1.94?GiB

Current?LE?????????????496

Segments???????????????1

Allocation?????????????inherit

Read?ahead?sectors?????auto

-?currently?set?to?????256

Block?device???????????253:1

#再次查看磁盤大小還是沒有增加

[root@centos002?~]#?df?-h

Filesystem????????????Size??Used?Avail?Use%?Mounted?on

/dev/mapper/vg_centos002-lv_root

18G??803M???16G???5%?/

tmpfs?????????????????238M?????0??238M???0%?/dev/shm

/dev/sda1?????????????477M???28M??425M???7%?/boot

#重設根分區大小

[root@centos002?~]#?resize2fs?/dev/vg_centos002/lv_root

resize2fs?1.41.12?(17-May-2010)

Filesystem?at?/dev/vg_centos002/lv_root?is?mounted?on?/;?on-line?resizing?required

old?desc_blocks?=?2,?new_desc_blocks?=?2

Performing?an?on-line?resize?of?/dev/vg_centos002/lv_root?to?7077888?(4k)?blocks.

The?filesystem?on?/dev/vg_centos002/lv_root?is?now?7077888?blocks?long.

#重新查看根分區大小

[root@centos002?~]#?df?-h

Filesystem????????????Size??Used?Avail?Use%?Mounted?on

/dev/mapper/vg_centos002-lv_root

27G??803M???25G???4%?/

tmpfs?????????????????238M?????0??238M???0%?/dev/shm

/dev/sda1?????????????477M???28M??425M???7%?/boot

總結

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