Let me know if they are helpful or even if they crash your system!
Expanding LVM based disk size on the fly (Fedora 16+)
Used on Fedora 16 GPT partition table
This disk is sitting on a VMware virtual machine - the VM GUI was used to add 40 GB to the existing 20 GB virtual disk, I then rebooted to pick up the change. Once rebooted I use fdisk to verify the 'physical' device, gdisk to modify the partition and resize it to the full extent as indicated by vmware. Once this is done the physical volume needs expanding (pvresize) and the logical volume needs extending (lvextend). A final filesystem resize (resize2fs) will allow the fs to be available for use. Again a final reboot checks everything. Reboots are not necessary as this can all be done on the fly.
STEP 1
# fdisk is no good on GPT tables but I used it to find the physical device name:
[root@HQ-SV-COMS-ARGUS ~]# fdisk -l
Disk /dev/sda: 64.4 GB, 64424509440 bytes
255 heads, 63 sectors/track, 7832 cylinders, total 125829120 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sda1 1 125829119 62914559+ ee GPT
Disk /dev/mapper/vg_hqsvcomsargus-lv_swap: 4227 MB, 4227858432 bytes
255 heads, 63 sectors/track, 514 cylinders, total 8257536 sectors
Units = sectors of 1 * 512 = 512 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_hqsvcomsargus-lv_swap doesn't contain a valid partition table
Disk /dev/mapper/vg_hqsvcomsargus-lv_root: 16.7 GB, 16710107136 bytes
255 heads, 63 sectors/track, 2031 cylinders, total 32636928 sectors
Units = sectors of 1 * 512 = 512 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_hqsvcomsargus-lv_root doesn't contain a valid partition table
STEP 2
# fedora 16 doesnt have gdisk so I installed it:
yum install gdisk -y
# run gdisk on that device
gdisk /dev/sda
# print current status
Command (? for help): p
Disk /dev/sda: 125829120 sectors, 60.0 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): C752E34E-343B-4021-A836-3515BB8240DC
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 125829086
Partitions will be aligned on 2048-sector boundaries
Total free space is 83890109 sectors (40.0 GiB)
Number Start (sector) End (sector) Size Code Name
1 2048 4095 1024.0 KiB EF02
2 4096 1028095 500.0 MiB EF00 ext4
3 1028096 41940991 19.5 GiB 8E00
Command (? for help): d
Partition number (1-3): 3
Command (? for help): p
Disk /dev/sda: 125829120 sectors, 60.0 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): C752E34E-343B-4021-A836-3515BB8240DC
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 125829086
Partitions will be aligned on 2048-sector boundaries
Total free space is 124803005 sectors (59.5 GiB)
Number Start (sector) End (sector) Size Code Name
1 2048 4095 1024.0 KiB EF02
2 4096 1028095 500.0 MiB EF00 ext4
Command (? for help): n
Partition number (3-128, default 3):
First sector (34-125829086, default = 1028096) or {+-}size{KMGTP}:
Last sector (1028096-125829086, default = 125829086) or {+-}size{KMGTP}:
Current type is 'Linux filesystem'
Hex code or GUID (L to show codes, Enter = 8300): 8e00
Changed type of partition to 'Linux LVM'
Command (? for help): p
Disk /dev/sda: 125829120 sectors, 60.0 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): C752E34E-343B-4021-A836-3515BB8240DC
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 125829086
Partitions will be aligned on 2048-sector boundaries
Total free space is 2014 sectors (1007.0 KiB)
Number Start (sector) End (sector) Size Code Name
1 2048 4095 1024.0 KiB EF02
2 4096 1028095 500.0 MiB EF00 ext4
3 1028096 125829086 59.5 GiB 8E00 Linux LVM
Command (? for help): w
Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!
Do you want to proceed? (Y/N): y
OK; writing new GUID partition table (GPT) to /dev/sda.
Warning: The kernel is still using the old partition table.
The new table will be used at the next reboot.
The operation has completed successfully.
[root@HQ-SV-COMS-ARGUS ~]# reboot
STEP 3
hq-lt-icts-dag:~ root# ssh 10.180.12.96
root@10.180.12.96's password:
Last login: Fri Oct 26 10:21:58 2012 from 10.180.2.134
[root@HQ-SV-COMS-ARGUS ~]# pvdisplay
--- Physical volume ---
PV Name /dev/sda3
VG Name vg_hqsvcomsargus
PV Size 19.51 GiB / not usable 9.00 MiB
Allocatable yes (but full)
PE Size 32.00 MiB
Total PE 624
Free PE 0
Allocated PE 624
PV UUID BoP2za-jBDl-eajm-vqaM-abZ3-KorZ-P3Mm5b
[root@HQ-SV-COMS-ARGUS ~]# pvresize /dev/sda3
Physical volume "/dev/sda3" changed
1 physical volume(s) resized / 0 physical volume(s) not resized
[root@HQ-SV-COMS-ARGUS ~]# pvdisplay
--- Physical volume ---
PV Name /dev/sda3
VG Name vg_hqsvcomsargus
PV Size 59.51 GiB / not usable 8.98 MiB
Allocatable yes
PE Size 32.00 MiB
Total PE 1904
Free PE 1280
Allocated PE 624
PV UUID BoP2za-jBDl-eajm-vqaM-abZ3-KorZ-P3Mm5b
[root@HQ-SV-COMS-ARGUS ~]# df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 16G 12G 2.6G 83% /
devtmpfs 992M 0 992M 0% /dev
tmpfs 1002M 0 1002M 0% /dev/shm
tmpfs 1002M 492K 1002M 1% /run
/dev/mapper/vg_hqsvcomsargus-lv_root 16G 12G 2.6G 83% /
tmpfs 1002M 0 1002M 0% /sys/fs/cgroup
tmpfs 1002M 0 1002M 0% /media
/dev/sda2 485M 83M 377M 19% /boot
[root@HQ-SV-COMS-ARGUS ~]# pvscan
PV /dev/sda3 VG vg_hqsvcomsargus lvm2 [59.50 GiB / 40.00 GiB free]
Total: 1 [59.50 GiB] / in use: 1 [59.50 GiB] / in no VG: 0 [0 ]
STEP 4
[root@HQ-SV-COMS-ARGUS ~]# lvextend -L +40G /dev/mapper/vg_hqsvcomsargus-lv_root
Extending logical volume lv_root to 55.56 GiB
Logical volume lv_root successfully resized
[root@HQ-SV-COMS-ARGUS ~]# df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 16G 12G 2.6G 83% /
devtmpfs 992M 0 992M 0% /dev
tmpfs 1002M 0 1002M 0% /dev/shm
tmpfs 1002M 496K 1002M 1% /run
/dev/mapper/vg_hqsvcomsargus-lv_root 16G 12G 2.6G 83% /
tmpfs 1002M 0 1002M 0% /sys/fs/cgroup
tmpfs 1002M 0 1002M 0% /media
/dev/sda2 485M 83M 377M 19% /boot
[root@HQ-SV-COMS-ARGUS ~]# resize2fs /dev/mapper/vg_hqsvcomsargus-lv_root
resize2fs 1.41.14 (22-Dec-2010)
Filesystem at /dev/mapper/vg_hqsvcomsargus-lv_root is mounted on /; on-line resizing required
old desc_blocks = 1, new_desc_blocks = 4
Performing an on-line resize of /dev/mapper/vg_hqsvcomsargus-lv_root to 14565376 (4k) blocks.
The filesystem on /dev/mapper/vg_hqsvcomsargus-lv_root is now 14565376 blocks long.
[root@HQ-SV-COMS-ARGUS ~]# df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 55G 12G 41G 23% /
devtmpfs 992M 0 992M 0% /dev
tmpfs 1002M 0 1002M 0% /dev/shm
tmpfs 1002M 496K 1002M 1% /run
/dev/mapper/vg_hqsvcomsargus-lv_root 55G 12G 41G 23% /
tmpfs 1002M 0 1002M 0% /sys/fs/cgroup
tmpfs 1002M 0 1002M 0% /media
/dev/sda2 485M 83M 377M 19% /boot
