Linux Server plus HDD expansion

From:http://bbs.chinaunix.net/thread-3613556-1-1.html

Test environment: Under VMware, centos6,64-bit version, the original system default partition,/dev/sda3 is LOGVOL01, mount to/on. Add a new 30G HDD SDB, expand the new HDD capacity to the original/up.
Test steps:
1.sdb partition, divide only one SDB1 2. Create PV on SDB1

1. Pvcreate/dev/sdb1

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Shows the situation of the lower PV

[Email protected] ~]# pvdisplay---physical volume---PV name/dev/sda3 VG Name volgr Oup PV Size 18.80 gib/not usable 3.00 MiBAllocatable Yes (but full) PE Size 4.00 MiB total pe 4813 free PE 0 allocated PE 4813 PV UUID r3dcdh-tavs-z0dy-btcg-f5fz-f8mf-dpajw3
"/DEV/SDB1" is a new physical volume of "30.00 GiB"---NEW physical volume---PV name/dev/sdb1 VG Name PV Size 30.00 GiBallocatable NO PE Size 0 Total pe 0 free PE 0 allocated PE 0 PV UUID 1YNXMW-JBLF-XAEE-ZKGD-0BSV-S7BL-SU1MQL

3. View the system now in the case of VG

[[email protected] ~]# vgdisplay   ---Volume group---  vg name      &nbs P        volgroup   system ID   Format                lvm2   metadata areas        1    Metadata Sequence no  3   vg access             Read/write & NBSP; VG status             resizable   max lv                 0   cur lv           &n bsp;    2   open lv               2    Max pv                0   cur pv      &nb Sp         1   aCT pv                1    VG Size 18.80 GiBPE Size 4.00 MiB total PE 4813 Alloc pe/size 4813/18.80 GiB free pe/size 0/0 VG UUID Xdh5kq-vkjk-nroe-dssd-mi1h-sqgk-r07ton

4. Expansion of VG

1. Vgextend VOLGROUP/DEV/SDB1

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Normal prompt: Volume group "VolGroup" successfully extended
5. Check the condition of the VG after expansion

[[email protected] ~]# vgdisplay   ---Volume group---  vg name      &nbs P        volgroup   system ID   Format                lvm2   metadata areas        2    Metadata Sequence no  4   vg access             Read/write & NBSP; VG status             resizable   max lv                 0   cur lv           &n bsp;    2   open lv               2    Max pv                0   cur pv      &nb Sp         2   aCT pv                2    VG Size 48.80 GiBPE Size 4.00 MiB total PE 12492 Alloc pe/size 4813/18.80 GiB free pe/size 7679/30.00 GiB VG UUID Xdh5kq-vkjk-nroe-dssd-mi1h-sqgk-r07ton

6. View the status of the system LV

[Email protected] ~]# lvdisplay---Logical volume---LV name/dev/volgroup/logvol01 VG Name VolGroup LV UUID iuveuw-2bmn-mm3h-gh16-fkar-chos-ifsosr LV Write Access read/write LV Status Available # open 1 LV Size 16.80 GiBCurrent LE 4301 segments 1 Allocation inherit Read ahead sectors auto- Currently set to Block device 253:0
  ---Logical volume---  lv name               / Dev/volgroup/logvol00   vg name                VolGroup & NBSP; LV uuid                U9WYDB-XADG-TCE1-FPXO-UYVE-V5GP-A8ULZR   lv Write access        read/write   LV status              available   # Open                  1   lv size     & nbsp;          2.00 GiB   current le                Segments               1    allocation             inherit   read ahead sectors     auto   -currently set to     256   Block device& nbsp          253:1

7. Expansion LV

[[email protected] ~]# LVEXTEND/DEV/VOLGROUP/LOGVOL01/DEV/SDB1 extending Logical volume LOGVOL01 to 46.80 GiB Logical Volume LogVol01 successfully resized

8. Check the LV after expansion

[Email protected] ~]# lvdisplay---Logical volume---LV name/dev/volgroup/logvol01 VG Name VolGroup LV UUID iuveuw-2bmn-mm3h-gh16-fkar-chos-ifsosr LV Write Access read/write LV Status Available # open 1 LV Size 46.80 GiBCurrent LE 11980 segments 2 Allocation inherit Read ahead sectors auto- Currently set to Block device 253:0
  ---Logical volume---  lv name               / Dev/volgroup/logvol00   vg name                VolGroup & NBSP; LV uuid                U9WYDB-XADG-TCE1-FPXO-UYVE-V5GP-A8ULZR   lv Write access        read/write   LV status              available   # Open                  1   lv size     & nbsp;          2.00 GiB   current le                Segments               1    allocation             inherit   read ahead sectors     auto   -currently set to     256   Block device& nbsp          253:1

9. Now the system partition is as follows,/no expansion

[[email protected] ~]# df-h file system capacity has been used with available percent mount points /dev/mapper/volgroup-logvol01 17G 8.3G 7.5G 53%/ tmpfs 499M 0 499M 0%/dev/shm/dev/sda1 194M 25 M 159M 14%/boot

10. Add/Enlarge

[email protected] ~]# resize2fs/dev/mapper/volgroup-logvol01 resize2fs 1.41.12 (17-may-2010) Filesystem At/dev/ma PPER/VOLGROUP-LOGVOL01 is mounted on/; On-line resizing required Old desc_blocks = 2, new_desc_blocks = 3 performing an on-line resize Of/dev/mapper/volgroup-lo GVol01 to 12267520 (4k) blocks. The filesystem on/dev/mapper/volgroup-logvol01 is now 12267520 blocks long.

11. After the expansion of the partition situation

[[email protected] ~]# df-h file system capacity has been used with available percent mount points /dev/mapper/volgroup-logvol01 47G 8.3G 36G 19%/ tmpfs 499M 0 499M 0%/dev/shm/dev/sda1 194M 25 M 159M 14%/boot

can see/partition has been successfully expanded from 18g+ to 47G

Linux Server plus HDD expansion