tid=27827&參考 : http://linux.vbird.org/linux_basic/0420quota.php#lvm
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[彈性放大LV容量]# F6 Q* [9 e7 E1 r
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1) lvextend -l 178813 /dev/11HD_vg/11HD_lv 9 h! H& J, J2 k
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% Y8 g: {8 n( J7 \1 S" G178813是欲加大的size,如2.7T=178813 PE, 1 PE=16MB
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2)lvresize -l 1966943 /dev/11HD_vg/11HD_lv- K4 e" @# K* A( g
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( w$ a' ~6 d, F1966943是加大後的總size,如30T=1966943 PE , 可以用 vgdisplay 11HD_vg 查目前的 vg 詳細資料,包含total size and free size ,單位都是 PE9 w- f, A. V) |& Y+ i- D, A
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+ @9 U$ d+ W) _, ]3)resize2fs /dev/11HD_vg/11HD_lv: |1 A& u) c1 p8 f' a+ A
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, H, M% c" E& z0 L$ Q) M/ p. b- ?* ~P.S假如找不到gdisk指令,使用 yum install gdisk 安裝
. e1 h0 e) b7 A1 _0 u! I* ~使用 gdisk 分割磁區時, & M- X8 F) e. B; o
Hex code or GUID (L to show codes, Enter = 8300): 輸入8e00 ===> LVM (logical volumn manager)* S, V2 G7 W7 `: K$ m* I& R3 ?
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[移除pv]
' l1 V3 F$ C3 _% v% g. Zpvscan or pvdisplay 毀損的硬碟會顯示:8 D. x2 l' r% ~4 c4 y2 z
Couldn't find device with uuid WWeM0m-MLX2-o0da-tf7q-fJJu-eiGl-e7UmM3
& U5 X( x$ a6 H# f0 d! }, oPV Name unknown device/ g/ r9 H# @4 n) B, J
) ?' i. ^' l9 d1 C8 O. t% Y0 d由於硬碟毀損,紀錄還留在VG內,因此需移除 PV:
1 @% [4 `! E& m+ R) ivgreduce --removemissing --force 11HD_vg #但也會把所有 LV刪除,故須重建 LV$ j1 m/ }4 v. M* k
pvscan or pvdisplay 就不會顯示 "unknown device"
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' Q6 f, f- O8 q' @9 m% s# K[如何mount 已存在於一顆硬碟內之LVM的partition]# `6 A4 v7 }5 K; ?
#pvscan
& R; t; N6 E( @. p8 Q PV /dev/sdc2 VG vg_centos6 lvm2 [27.46 GiB / 0 free] <===== 吾人想要mount 的LVM (已存在於別顆硬碟)
. Q5 J7 l, L8 b- e; A; @ PV /dev/sdb2 VG vg_test lvm2 [18.92 GiB / 0 free]
: z* e9 R. W s Total: 2 [46.39 GiB] / in use: 2 [46.39 GiB] / in no VG: 0 [0 ]# C6 I9 Z9 i3 W4 J. {1 ?
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#vgscan
/ o1 |% B! n: @3 }! |/ x Reading all physical volumes. This may take a while...
: N0 y) {& T" ^2 | Found volume group "vg_centos6" using metadata type lvm2: u9 |5 s4 v# s, n+ I, q
Found volume group "vg_test" using metadata type lvm2- L' D1 u7 ?0 ?: P( |! Y) F
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[7 J- Z8 B) g& P+ c. i inactive '/dev/vg_centos6/lv_root' [21.84 GiB] inherit <====未啟用
0 ]) i/ T7 |4 I6 U2 ]# c inactive '/dev/vg_centos6/lv_swap' [5.62 GiB] inherit <====未啟用; i+ t5 e1 N. J; m" b* e- K, T
ACTIVE '/dev/vg_test/lv_root' [16.98 GiB] inherit
) Z# v' }! K+ y0 M) x7 x* G6 H ACTIVE '/dev/vg_test/lv_swap' [1.94 GiB] inherit9 \) g* d6 |; @( L9 K) H% `% x
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#lvdisplay /dev/vg_centos6/lv_root) v4 |( z/ v5 K6 z
--- Logical volume ---- R o4 h- o/ I, {& c% V
LV Path /dev/vg_centos6/lv_root
% }! [! Q% v5 {; o( b LV Name lv_root0 _6 g" I3 \5 A. G/ [9 x
VG Name vg_centos68 c# A( ` d) A! e1 M
LV UUID 0nFiiu-yDQG-1JUB-JI2r-uoTe-Hupi-WGisCe
! {! t) O, d9 \ LV Write Access read/write8 x9 E. Q8 _9 c5 C) W
LV Creation host, time ,% X5 r( f3 o% W5 J
LV Status unavailable <==== 不可用
0 q0 O: `+ x" z5 j7 [5 T # open 1
! c7 X3 {; E4 W1 ]# p, w LV Size 21.84 GiB5 C4 y8 {' A4 e( @ x% B6 x# k
Current LE 5591
7 S+ t# a, u) w7 ^ D Segments 1
& C7 [9 Q& Z4 K: m" \4 f Allocation inherit: X0 Z1 m4 j2 z* a/ m
Read ahead sectors auto2 J; ]; n4 Q' T+ @
- currently set to 256
- s+ m4 F8 k0 h Block device 253:2! {1 }: ~( R8 g! s) ]8 A4 G! t
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" l0 ~; p/ M$ f) Z+ f6 _' u1 y重點在這裡:( e1 O" M% H/ R2 N
vgchange -ay vg_centos6 <====== 啟動 VG (假如 關閉VG ==> vgchange -an vg_centos6)
7 g2 u, ^* L; u9 H- i再查一次 LV:
4 X4 B5 D7 n# R. F8 W8 R#lvscan
! }$ `6 a0 Q: w+ b1 Z7 g ACTIVE '/dev/vg_centos6/lv_root' [21.84 GiB] inherit <====已啟動了6 y8 \6 g4 y1 s/ V- O
ACTIVE '/dev/vg_centos6/lv_swap' [5.62 GiB] inherit <====已啟動了+ j: }' i! W/ G
ACTIVE '/dev/vg_test/lv_root' [16.98 GiB] inherit
- w U( u/ h. x) `, g# @- r ACTIVE '/dev/vg_test/lv_swap' [1.94 GiB] inherit
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2 _1 ~1 y' L4 Qmount LVM:$ Q4 F7 m/ N1 V! v
mkdir /mnt/lvmdisk0 y3 A7 H- z) o$ j) S% X9 H
mount /dev/vg_centos6/lv_root /mnt/lvmdisk. B' q! B7 v8 g3 f9 q& j
大功告成!
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