topic Re: Remove a file system in Operating System - HP-UX

Remove a file system

j773303 — Tue, 03 Dec 2002 03:37:59 GMT

As title. How to remove a file system?
Assume a logical volume /dev/vg00/lvol2 was
created.
Thanks.

Re: Remove a file system

Rajeev Shukla — Tue, 03 Dec 2002 03:47:04 GMT

unmount the filesystem and use lvremove command to do that.
lvremove /dev/vg00/lvol2

cheers
Rajeev

Re: Remove a file system

S.K. Chan — Tue, 03 Dec 2002 03:47:53 GMT

You don't mean /dev/vg00/lvol2 right because that's usually for primary swap ? Assuming you're talking about non-root volume group (non-vg00), all you need to do is ..
==> Assuming /dev/vg01/lvol1 mounted on /opt/apps
# cd /
# umount /opt/apps
# lvremove /dev/vg01/lvol1
# vi /etc/fstab
==> Delete the appropriate entry.
# vgdisplay -v vg01 | more
==> Make sure "lvol1" is gone and previous extents used are now "released".

Re: Remove a file system

harry d brown jr — Tue, 03 Dec 2002 03:47:54 GMT

lvremove

if it's unmounted

live free or die
harry

Re: Remove a file system

Bill Hassell — Tue, 03 Dec 2002 04:19:02 GMT

lvremove /dev/vg00/lvol2 (don't do it!)

will very likely crash your system since removing primary swap is like removing RAM while the system is running. And single user mode will also fail because HP-UX requires primary swap to be available.

Re: Remove a file system

Juan Manuel López — Tue, 03 Dec 2002 09:45:35 GMT

Hi all.
First off all, you have to unmount ths file system:

" umount < fisystem name > "

If you have process over the file system, you will get the message " Device Busy ".

In this case, you have to find out witch process are over your file system. Use this command: " fuser < fylesystem name > " or " fuser /dev/vgxx/lvolx ".
( fuser -k < file system name > will kill all the process ).
Once you have kill ( or exit ) the process over you file system, you can unmount it.

Last step is to delete the lv. " lvremove /dev/vgxx/lvolx ".

And that??s all you have to do.

It easy, isn??t it ?

I hope this help you.

Juanma.

Re: Remove a file system

Steven E. Protter — Tue, 03 Dec 2002 17:54:57 GMT

if there is someone on the filesystem

fuser -cuk /filesystem
kills all processes
Won't work on /var because there are teminal files created for every telnetd process, you can't be logged on and remove /var.
then lvremve etc.

Some filesystems like /var can't be removed in multi user mode.

In that case you will need to restart the box, interupt the boot, hpux -is to enter single user mode.

Then nothing will be mounted and you can safely remove the filesystem.

Of course if you actually remove /usr or /var you need to put them back if you plan on actually starting your system after single user mode.