The current version is 7.2
The request I had was of course a short and curt give-it-to-me email
Please add 30GB to existing file system, /oracle/SOL/sapdata5 on server server1.
The exiting size is 24GB which will become 54GB.
Of course the very first thing you do after being assigned disks by the SAN team is to make sure you scan for the unallocated/free disks. I have had cases where some engineers forgot to scan all disks and just add 2 out of 3 disks allocated and for a long long time there was one unused disk just sitting there waiting to be taken up by a VG. Yes, it happens. Humans always err
1. Run a lspv command to check for new unassigned disks
root@server1 / : lspv
hdisk0 00c49eaa11348c3f rootvg active
hdisk1 00c49eaa11348c76 rootvg active
hdisk2 00c49eaacde6c88a vgarch active
hdisk3 00c49eaacde6c9b7 vgdata active
hdisk4 00c49eaacde6c764 vgapp active
hdisk5 00c49eaacde6ca4a vgdata active
hdisk6 00c49eaacde6c7f7 vgapp active
hdisk7 00c49eaacde6c922 vgarch active
hdisk8 00c49eaa1e216ad0 vgapp active
hdisk9 00c49eaa1e21a105 vgapp active
hdisk10 00c49eaad7434b3c vgdata active
hdisk11 00c49eaad7423f03 vgarch active
hdisk12 00c49eaad74349ec vgarch active
hdisk13 00c49eaad7434cfb vgdata active
hdisk14 00c49eaa4c7a179a vgdata active
hdisk15 00c49eaa4c7a96a1 vgdata active
hdisk16 00c49eaab37c9028 None
hdisk17 00c49eaab37c6be4 None
2. Take the current file systems size, its LV and its VG size and parameters. Just save it in a notepad so you can compare later.
lvdata5 is the LV of the file system /oracle/SOL/sapdata5
vgdata is the VG of the file system /oracle/SOL/sapdata5
Make note of the FREE PP size in vgdata, there's only about 1800 MB left which isn't sufficient for us to extend the file system
3. Then you add the disks to the VG of that file system
root@server1 / : chdev -l hdisk16 -a pv='yes'
hdisk16 changed
root@server1 / : chdev -l hdisk17 -a pv='yes'
hdisk17 changed
root@server1 / : extendvg vgdata hdisk16
root@server1 / : extendvg vgdata hdisk17
4. You can check the new disks' space and its parameters details with the lspv command
5. When you run the lsvg command again, look at the FREE PP, the size has increased significantly
6. What's left to do is just to extend the file system. I encountered this error when I tried to extend the file system
root@server1 / : chfs -a size=+30G /oracle/SOL/sapdata5
0516-1034 lquerypv: Not enough physical partitions in physical volume hdisk3.
0516-788 extendlv: Unable to extend logical volume.
It appears that there is an upperbound restriction on the LV, which I changed with the smitty command line tool
I like to extend filesystem in batches, because I like to have a look at the FREE PP while I am doing it, and in my case, I extended the file system in batches
7. First, I added 15G to the FS
root@server1 / : chfs -a size=+15G /oracle/SOL/sapdata5
Filesystem size changed to 80740352
root@aserver1 / : df -g /oracle/SOL/sapdata5
Filesystem GB blocks Free %Used Iused %Iused Mounted on
/dev/lvdata5 38.50 15.01 62% 2504 1% /oracle/SOL/sapdata5
8. Then I added a further 14G to it
root@server1 / : chfs -a size=+14 /oracle/SOL/sapdata5
Filesystem size changed to 80756736
root@server1 / : df -g /oracle/SOL/sapdata5
Filesystem GB blocks Free %Used Iused %Iused Mounted on
/dev/lvdata5 38.51 15.02 61% 2504 1% /oracle/SOL/sapdata5
9. Another 14G...
root@server1 / : chfs -a size=+14G /oracle/SOL/sapdata5
Filesystem size changed to 110116864
root@server1 / : df -g /oracle/SOL/sapdata5
Filesystem GB blocks Free %Used Iused %Iused Mounted on
/dev/lvdata5 52.51 29.02 45% 2504 1% /oracle/SOL/sapdata5
10. And a remaining 500MB that I could still squeeze from the LV
root@server1 / : chfs -a size=+500M /oracle/SOL/sapdata5
Filesystem size changed to 111149056
root@server1 / : df -g /oracle/SOL/sapdata5
Filesystem GB blocks Free %Used Iused %Iused Mounted on
/dev/lvdata5 53.00 29.51 45% 2504 1% /oracle/SOL/sapdata5
11. And the final size of the FS is now 53G. I was still short of 1G, but if you want to show client that you did your part, then do a df -m screenshot and email that to them instead
**because I had changed the actual server name for my blog, it shows as aserver1 and server1. It is purely a copy-paste typo error
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