Extending /opt

[subodhbagade]

Hello Expert,

I am using hp-ux production server 11.11 and Sap application are running on it, need your help for following task.

I don't have online Jfs product installed on server.

1)I have to extend the /opt, but during umounting it showing device is busy.i tried with
#fuser -ku /opt
#kill -9 pid

but still device showing busy.

2)I think so i have to boot the interupt sequence and go into ISL mode for single user mode.

3)But can you give me exact steps and command to go into single user mode and again back to multiuser mode without affecting running appln.Hopes this will help to umount the file system.

3)which file system needs to be unmount in single user mode?

thanks in advance.

Regards,
subodh.

[James R. Ferguson]

Hi:

If you don't have Online JFS (and you should!) then you can't use 'fsadm' to resize a filesystem without unmounting it.

If this is the case, you must unmount the filesystem in order to 'extendfs' it. For most 'vg00' filesystems it is easiest if you *boot into* single user-mode where only the root filesystem is mounted. Use the commands in '/sbin' or in your specific case, mount '/usr' since this isn't the filesystem that needs extension.

It is cleanest, when done, to simply reboot again and resume normal production.

Regards!

...JRF...

[Vivek Bhatia · Accepted solution]

Hi,

1. Interrupt the boot sequence at BCH
2. check for the bootable devices using
sea ipl
3. then run bo P0 (boot as per the path)
4. Then interact with ISL
5. Then do hpux -is at the isl prompt
#hpux -is

6.check weather /opt is unmounted or not
If not then unmount the filesystem
7. do a lvextend to increase the size of the logical volume.
#lvextend
8. Do a extendfs for extending the filesystem
#extendfs

Then mount the filesystem and check if everything is working fine and then boot the system in the multiuser mode

Thanks
Vivek Bhatia

[SKR_1]

Extend the File system from single user mode.

lvextend -L size(M) lvolname
extendfs -F vxfs -b size(M) /opt

Thanks

SKR

[Sandeep_Chaudhary]

as mentioned above:

reboot server

interrupt BCH and boot with primary boot disk
interrupt ISL and type "hpux -is"
make sure that /opt not mounted.
extend size of /opt with "lvextend -L newlvsizeinmb /dev/vg00/lvol6

extendfs -F vxfs /dev/vg00/rlvol6

reboot system

[Peter Eichhorn]

We use here a modified /etc/lvmrc script which allows us to autoextend all filesystems (except the boot filesystem) at boottime. We just do an lvextend, then uncomment or add the lvol in lvmrc and reboot without any interaction. We use and need this way because we support the systems via remote access. This way works fine for HP-UX 10 and 11.

If you want I can send you a copy of that script.

regards,
PeterE

[likid0]

Hy Peter Eichhorn,

You could upload the modified lvmrc script, to give it a look, sound great.

thnx

[MarkSyder]

An alternative is to create a new filesystem, /opt/product (where product is the new product you are installing). You can do this without interruption to your users.

Mark Syder (like the drink but spelt different)

[Peter Eichhorn]

Sorry for the delay. But here comes my script to autoextend the file systems at boot time.

To install the new script save it as /etc/lvmrc.myone (or what ever name your want) and do:

cp -p /etc/lvmrc /etc/lvmrc.HP
cp /etc/lvmrc.myone /etc/lvmrc
chmod 444 /etc/lvmrc*
chown bin:bin /etc/lvmrc*

Next lvextend all lvols you want to extend and edit /etc/lvmrc. Uncomment one or some of the pre-defined '/sbin/extendfs' lines or add your own one at the end in function 'custom_vg_actions'.

Control your changes for syntax errors with:

/sbin/sh -xp /etc/lvmrc

There should be NO error!

Now reboot the system and after it is up again control the logfile /etc/lvmrc.log

After the file system has been extended you can comment out the line
AUTO_VG_ACTIVATE=0 at top page of the script but there is no need to do so. This script function is reboot-save.

After rebooting you can comment out the '/sbin/extendfs' in the lvmrc script but there is no need to do so.

Hope this helps. For me it works fine with HP-UX 10 and 11.

- PeterE

[SKR_1]

>> extendfs -F vxfs -b size(M) /opt

Sorry, this is not the right syntex, you need to give

extendfs -F vfxs /dev/vg00/lvolname

Thanks

SKR

[sreekanthtm]

Hi,

>> But can you give me exact steps and command to go into single user mode and again back to multiuser mode without affecting running appln???

No, you cannot. Reboot is compulsory.

Vivek Bhatia is exactly right in describing the steps. One add.... You need to mount /usr file system manualy.
# mount /usr
OR
# mount /dev/vg00/lvol7 /usr

Rgds
Sreekanth