給linux新增磁碟並擴充套件邏輯卷

czxin788發表於2015-03-09
給linux新增磁碟並擴充套件邏輯卷
               ——生產實錄

 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: 0x000e7336

   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


Disk /dev/mapper/vg_minisite-lv_root: 16.7 GB, 16718495744 bytes
255 heads, 63 sectors/track, 2032 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


Disk /dev/mapper/vg_minisite-lv_swap: 4227 MB, 4227858432 bytes
255 heads, 63 sectors/track, 514 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

[root@minisite ~]# 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 0x4cebbd75.
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): 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: 0x4cebbd75

   Device Boot      Start         End      Blocks   Id  System

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): m
Command action
   a   toggle a bootable flag
   b   edit bsd disklabel
   c   toggle the dos compatibility flag
   d   delete a partition
   l   list known partition types
   m   print this menu
   n   add a new partition
   o   create a new empty DOS partition table
   p   print the partition table
   q   quit without saving changes
   s   create a new empty Sun disklabel
   t   change a partition's system id
   u   change display/entry units
   v   verify the partition table
   w   write table to disk and exit
   x   extra functionality (experts only)

Command (m for help): l

 0  Empty           24  NEC DOS         81  Minix / old Lin bf  Solaris        
 1  FAT12           39  Plan 9          82  Linux swap / So c1  DRDOS/sec (FAT-
 2  XENIX root      3c  PartitionMagic  83  Linux           c4  DRDOS/sec (FAT-
 3  XENIX usr       40  Venix 80286     84  OS/2 hidden C:  c6  DRDOS/sec (FAT-
 4  FAT16 <32M      41  PPC PReP Boot   85  Linux extended  c7  Syrinx         
 5  Extended        42  SFS             86  NTFS volume set da  Non-FS data    
 6  FAT16           4d  QNX4.x          87  NTFS volume set db  CP/M / CTOS / .
 7  HPFS/NTFS       4e  QNX4.x 2nd part 88  Linux plaintext de  Dell Utility   
 8  AIX             4f  QNX4.x 3rd part 8e  Linux LVM       df  BootIt         
 9  AIX bootable    50  OnTrack DM      93  Amoeba          e1  DOS access     
 a  OS/2 Boot Manag 51  OnTrack DM6 Aux 94  Amoeba BBT      e3  DOS R/O        
 b  W95 FAT32       52  CP/M            9f  BSD/OS          e4  SpeedStor      
 c  W95 FAT32 (LBA) 53  OnTrack DM6 Aux a0  IBM Thinkpad hi eb  BeOS fs        
 e  W95 FAT16 (LBA) 54  OnTrackDM6      a5  FreeBSD         ee  GPT            
 f  W95 Ext'd (LBA) 55  EZ-Drive        a6  OpenBSD         ef  EFI (FAT-12/16/
10  OPUS            56  Golden Bow      a7  NeXTSTEP        f0  Linux/PA-RISC b
11  Hidden FAT12    5c  Priam Edisk     a8  Darwin UFS      f1  SpeedStor      
12  Compaq diagnost 61  SpeedStor       a9  NetBSD          f4  SpeedStor      
14  Hidden FAT16 <3 63  GNU HURD or Sys ab  Darwin boot     f2  DOS secondary  
16  Hidden FAT16    64  Novell Netware  af  HFS / HFS+      fb  VMware VMFS    
17  Hidden HPFS/NTF 65  Novell Netware  b7  BSDI fs         fc  VMware VMKCORE 
18  AST SmartSleep  70  DiskSecure Mult b8  BSDI swap       fd  Linux raid auto
1b  Hidden W95 FAT3 75  PC/IX           bb  Boot Wizard hid fe  LANstep        
1c  Hidden W95 FAT3 80  Old Minix       be  Solaris boot    ff  BBT            
1e  Hidden W95 FAT1

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.
[root@minisite ~]# partx -a /dev/sdb
BLKPG: Device or resource busy
error adding partition 1
[root@minisite ~]# lsblk 
NAME                           MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sr0                             11:0    1 1024M  0 rom  
sda                              8:0    0   20G  0 disk 
忖sda1                           8:1    0  500M  0 part /boot
忖sda2                           8:2    0 19.5G  0 part 
  忖vg_minisite-lv_root (dm-0) 253:0    0 15.6G  0 lvm  /
  忖vg_minisite-lv_swap (dm-1) 253:1    0    4G  0 lvm  [SWAP]
sdb                              8:16   0   10G  0 disk 
忖sdb1                           8:17   0   10G  0 part 
[root@minisite ~]# pvcreate /dev/sdb1
  Physical volume "/dev/sdb1" successfully created
[root@minisite ~]# vgdisplay 
  --- Volume group ---
  VG Name               vg_minisite
  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               8ZwMrO-qNqg-Xdsn-l8SG-ecZf-WFbB-R4Si2z
   
[root@minisite ~]# lvdisplay 
  --- Logical volume ---
  LV Path                /dev/vg_minisite/lv_root
  LV Name                lv_root
  VG Name                vg_minisite
  LV UUID                owBHOh-LSip-wWFx-CTtU-sezw-6tE9-VzVMHz
  LV Write Access        read/write
  LV Creation host, time minisite, 2013-12-27 18:09:52 +0800
  LV Status              available
  # open                 1
  LV Size                15.57 GiB
  Current LE             3986
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0
   
  --- Logical volume ---
  LV Path                /dev/vg_minisite/lv_swap
  LV Name                lv_swap
  VG Name                vg_minisite
  LV UUID                vCCRq7-CdkY-erXQ-ZFPX-3Bi1-yaxi-efTvul
  LV Write Access        read/write
  LV Creation host, time minisite, 2013-12-27 18:09:59 +0800
  LV Status              available
  # open                 1
  LV Size                3.94 GiB
  Current LE             1008
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1
   
[root@minisite ~]# vgextend vg_minisite /dev/sdb1
  Volume group "vg_minisite" successfully extended
[root@minisite ~]# vgdisplay 
  --- Volume group ---
  VG Name               vg_minisite
  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               8ZwMrO-qNqg-Xdsn-l8SG-ecZf-WFbB-R4Si2z
   
[root@minisite ~]# lvextend -l +2558 /dev/vg_minisite/lv_root          #-l是按照pe的方式計算,一個PE是4M。
  Extending logical volume lv_root to 25.56 GiB
  Logical volume lv_root successfully resized
註釋:上面是用PE來計算的空間,即2558(個)*4M;當然也可以直接加空間大小,這樣更方便: lvextend -L+2G /dev/vg_minisite/lv_root 
[root@minisite ~]# resize2fs /dev/vg_minisite/lv_root             #使擴充套件的邏輯卷生效
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/vg_minisite/lv_root is mounted on /; on-line resizing required
old desc_blocks = 1, new_desc_blocks = 2
Performing an on-line resize of /dev/vg_minisite/lv_root to 6701056 (4k) blocks.
The filesystem on /dev/vg_minisite/lv_root is now 6701056 blocks long.

[root@minisite ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_minisite-lv_root
                       26G  5.2G   19G  22% /
tmpfs                 939M     0  939M   0% /dev/shm
/dev/sda1             485M   37M  423M   9% /boot





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