This should be easy to the regular server admin but I couldn't get it figured out under linux (took me about an hour under xp64 including research :-/).
My media server at home runs Ubunt Hardy x86_64 (2.6.24-21-generic). /boot (ext3) and /tmp (ext3) are on one hdd (sdb), everything else ( / (xfs)) is on a hardware raid 6 (sda). I recently added another hdd to my raid setup (areca 3112ml with - now - 7 x 750GB) and expanded and migrated the raid set on hardware level. This worked fine. Now I would like to make the extra 750GB space available to my volumegroup which does not seem to have noticed that the one hdd it thinks it consists of just grew some extra bytes.
stefan@unterhaltung:~$ sudo vgdisplay --- Volume group --- VG Name VolGroup00 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 2.73 TB PE Size 64.00 MB Total PE 44712 Alloc PE / Size 44712 / 2.73 TB Free PE / Size 0 / 0 VG UUID Jqfec5-tep4-vnLJ-1v5O-uk4O-iRdv-Nx4EE8
stefan@unterhaltung:~$ sudo lvm vgs VG #PV #LV #SN Attr VSize VFree VolGroup00 1 2 0 wz--n- 2.73T 0
Areca's raid manager says:
Raid Set Information Raid Set Name Raid Set # 00 Member Disks 7 Total Raw Capacity 5251.1GB Free Raw Capacity 0.0GB Min Member Disk Size 750.2GB Raid Set Power State Operating Raid Set State Normal
Volume Set Information Volume Set Name ARC-1231-VOL#00 Raid Set Name Raid Set # 00 Volume Capacity 3750.8GB SCSI Ch/Id/Lun 0/0/0 Raid Level Raid 6 Stripe Size 64KBytes Block Size 512Bytes Member Disks 7 Cache Mode Write Back Tagged Queuing Enabled Volume State Normal
stefan@unterhaltung:~$ df Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/VolGroup00-LogVol00 2925985792 2468813344 457172448 85% / varrun 1031536 996 1030540 1% /var/run varlock 1031536 0 1031536 0% /var/lock udev 1031536 44 1031492 1% /dev devshm 1031536 12 1031524 1% /dev/shm lrm 1031536 44968 986568 5% /lib/modules/2.6.24-21-g eneric/volatile /dev/sdb1 93504 64032 29472 69% /boot /dev/sdb2 102348276 5128 102343148 1% /tmp gvfs-fuse-daemon 2925985792 2468813344 457172448 85% /home/stefan/.gvfs
How do I go about accomplishing this without seriously endangering the data? I can backup some essential data, but I have no means of backing-up 3TB for a re-install. Manually tweaking the partition table and deleting and re-establishing partitions without losing data (as I read in one post) seriously scares me.
Thank you