tid=27827&參考 : http://linux.vbird.org/linux_basic/0420quota.php#lvm
+ N$ L3 j; ^% x) l+ M' p http://linux.vbird.org/linux_basic/0230filesystem.php#gdisk
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) ?( Y* M, u" E5 r6 G2 Z7 m9 g1 L[彈性放大LV容量]
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1) lvextend -l 178813 /dev/11HD_vg/11HD_lv
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178813是欲加大的size,如2.7T=178813 PE, 1 PE=16MB
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, ~0 L# b) B( v8 e+ M2)lvresize -l 1966943 /dev/11HD_vg/11HD_lv# J2 J2 e' r+ {3 H$ A x
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1966943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 PE2 G8 t: m1 q: m8 J# G6 c) R' E
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3)resize2fs /dev/11HD_vg/11HD_lv
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P.S假如找不到gdisk指令,使用 yum install gdisk 安裝
& t% S6 _$ o4 }& R' k/ L/ Y, X使用 gdisk 分割磁區時,
+ ?$ r/ N+ ?% ^/ @" M( xHex code or GUID (L to show codes, Enter = 8300): 輸入8e00 ===> LVM (logical volumn manager)9 t I3 e) _$ I4 _! u9 h
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9 R6 I. A! `3 y0 |! \6 O[移除pv]2 |; _" P& s" V/ `2 K5 Z
pvscan or pvdisplay 毀損的硬碟會顯示:
8 u/ O$ N) g7 d6 MCouldn't find device with uuid WWeM0m-MLX2-o0da-tf7q-fJJu-eiGl-e7UmM3
( g' l" e. X8 R. b7 U/ y- ^/ c4 oPV Name unknown device$ ?& ]+ t9 e5 p4 N+ E- m& c
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由於硬碟毀損,紀錄還留在VG內,因此需移除 PV:# a8 d! Y2 y, p3 N, C0 y
vgreduce --removemissing --force 11HD_vg #但也會把所有 LV刪除,故須重建 LV( F- z6 j! |* G& C- A C
pvscan or pvdisplay 就不會顯示 "unknown device"
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[如何mount 已存在於一顆硬碟內之LVM的partition]. v' b2 `4 H$ v: _9 b/ |& W, K6 j
#pvscan
4 A: A; i3 c: M' ~( x 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)
" d+ T) n- j+ j( x$ T# B) N PV /dev/sdb2 VG vg_test lvm2 [18.92 GiB / 0 free]
" {/ P% J% [, @5 x1 D% U/ S Total: 2 [46.39 GiB] / in use: 2 [46.39 GiB] / in no VG: 0 [0 ]
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#vgscan
) m- a3 O7 g8 Z6 s; U Reading all physical volumes. This may take a while...: M) Z. [ @- v, S- O
Found volume group "vg_centos6" using metadata type lvm2, }4 u0 A0 o! v2 T- J
Found volume group "vg_test" using metadata type lvm21 W/ _" V" w" U+ _6 o6 _
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, c" b- ^) |1 }. B#lvscan: |# C" p9 C" A* c2 A
inactive '/dev/vg_centos6/lv_root' [21.84 GiB] inherit <====未啟用
6 `' H4 ~0 h( V n2 ~5 R. F inactive '/dev/vg_centos6/lv_swap' [5.62 GiB] inherit <====未啟用. ~3 q" Z4 L' ~) v4 S6 `
ACTIVE '/dev/vg_test/lv_root' [16.98 GiB] inherit
: a1 L: e9 b; n2 p ACTIVE '/dev/vg_test/lv_swap' [1.94 GiB] inherit$ L6 P& ` U$ l4 A8 G/ K% ]
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9 v% Y9 M" P4 m#lvdisplay /dev/vg_centos6/lv_root. m8 E& l- u0 } T
--- Logical volume ---* {6 f: B; d) n- P1 }) G4 k+ j
LV Path /dev/vg_centos6/lv_root
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4 N3 q6 S" [& `6 @0 J7 P LV UUID 0nFiiu-yDQG-1JUB-JI2r-uoTe-Hupi-WGisCe
0 D/ B8 G* ]9 w5 ?, W LV Write Access read/write
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- @; P. d- b6 r& U8 @% p+ j" R) W LV Status unavailable <==== 不可用1 ^- ~+ C5 q; N8 q7 I0 u8 z/ H
# open 10 r }& s3 _$ t6 \& E$ y7 x
LV Size 21.84 GiB# r8 j1 \+ Z% X' W! J( J
Current LE 5591 S) I/ ~7 [4 F5 z1 b
Segments 1
( E( x1 k$ {4 H p Allocation inherit. ~: \( k2 r9 p' Z" L ^3 C
Read ahead sectors auto
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Block device 253:2. ~, a1 x) ~! O
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重點在這裡:
: h; q$ a* `8 fvgchange -ay vg_centos6 <====== 啟動 VG (假如 關閉VG ==> vgchange -an vg_centos6)* X+ G, {7 w5 _3 T" P2 K1 _# \
再查一次 LV:+ @) J' k# A* [9 k
#lvscan
/ }% f* {. K' V! p3 ? ACTIVE '/dev/vg_centos6/lv_root' [21.84 GiB] inherit <====已啟動了- J* E) ^$ }. q/ T
ACTIVE '/dev/vg_centos6/lv_swap' [5.62 GiB] inherit <====已啟動了/ t% N2 s9 y7 O; M
ACTIVE '/dev/vg_test/lv_root' [16.98 GiB] inherit- ]* x/ J4 P- d+ F' Z i# Q
ACTIVE '/dev/vg_test/lv_swap' [1.94 GiB] inherit
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mount LVM:
; a# T9 y& v& W# Cmkdir /mnt/lvmdisk: I) x* ?; ~, e% ]2 L- T
mount /dev/vg_centos6/lv_root /mnt/lvmdisk
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發表於 2016-1-20 16:52:08
