topic Re: find if under one filesystem other filesystems are mounted in Operating System - HP-UX

find if under one filesystem other filesystems are mounted

support_billa — Sat, 06 Aug 2011 13:03:56 GMT

hello,

i have following situation:

mounted filesystems:

/filesystem
/filesystem/fs1
/filesystem/fs2

how can i find out , if under one filesystem other filesystems are mounted ? (filesystem where mounted with server startup (/etc/fstab) or with service guard package start)
when i want to umount /filesystem? , i got following message :
umount: cannot unmount /dev/vg/lvol_fs : Device busy
umount: return error 1.

can i use following infomartion from thread "hard link (find file , which it points to )
i learned : inode number 2 is a mounted filesystem , right ?
with command "/sbin/vxupgrade ?" i can see the filesystem version and with version greater 6 , i can use
/usr/sbin/vxlsino <inode> <file_system>          ?

regards,

Re: find if under one filesystem other filesystems are mounted

Dennis Handly — Sat, 06 Aug 2011 13:29:05 GMT

>if under one filesystem other filesystems are mounted?

You can look first in /etc/fstab, then in /etc/mnttab.

Re: find if under one filesystem other filesystems are mounted

Doug O'Leary — Sat, 06 Aug 2011 16:07:54 GMT

Hey;

mount | grep filesystem | awk '{print $1}'

I typically write an inline script to umount all the filesystems for vgoracle, for instance:

mount | grep vgoracle |awk '{print $1}' | sort -r | while read mp

echo ${mp}

umount ${mp}

done

HTH;

Doug O'Leary

Re: find if under one filesystem other filesystems are mounted

Naj — Sun, 07 Aug 2011 14:21:55 GMT

Hi,

I agree with Dennis, you may look into both file

Re: find if under one filesystem other filesystems are mounted

James R. Ferguson — Sun, 07 Aug 2011 15:55:03 GMT

@support_billa wrote:

i learned : inode number 2 is a mounted filesystem , right ?

This is correct.

Regards!

...JRF...

Re: find if under one filesystem other filesystems are mounted

Dennis Handly — Sun, 07 Aug 2011 19:34:35 GMT

>I learned: inode number 2 is a mounted filesystem, right?

I'm not sure how useful this will be for you. While you could do "ll -i /" to find all of the mounted filesystems under /, looking deeper will be a waste of time.

Re: find if under one filesystem other filesystems are mounted

Johnson Punniyalingam — Mon, 08 Aug 2011 06:18:32 GMT

You can check /etc/fstab . more over if the /etc/fstab has been updated promptly by (Sysadmin) if some have mounted it manually. you refer to /etc/mnttab

Best Regards,

Johnson

Re: find if under one filesystem other filesystems are mounted

Hiren N Dave — Mon, 08 Aug 2011 06:48:29 GMT

>> when i want to umount /filesystem? , i got following message : >> umount: cannot unmount /dev/vg/lvol_fs : Device busy

You can check current processes which are using this mount point using this command

# fuser -cu /mount_point

Regards,

Re: find if under one filesystem other filesystems are mounted

support_billa — Mon, 08 Aug 2011 21:17:15 GMT

hello,

/etc/mnttab is a very good idea, here can i find all mounted filesystems (like mount -p )

when i want to "grep" with a reg expr. then i can see also if under a filesystem other filesystems are mounted ?

like : grep "/testfs" /etc/mnttab | wc -l ?

with a script umount all other filesystems is a good solution, but not for my case usable.

regards

Re: find if under one filesystem other filesystems are mounted

support_billa — Tue, 09 Aug 2011 08:26:13 GMT

here my idea to search for filesystem(s) in /etc/mnttab with help from replace a string with "/" in a variable

awk -v FSYS="/filesystem" 'BEGIN {found=0} $2 ~ ("^"FSYS) { found=found+1 } END {print found}' /etc/mnttab

this show show following filesystem(s)

/filesystem
/filesystem/fs1
/filesystem/fs2

regards

Re: find if under one filesystem other filesystems are mounted

Dennis Handly — Tue, 09 Aug 2011 12:03:02 GMT

You may want to do a better job matching

awk -v FSYS="/filesystem" '
BEGIN {found=0}
$2 == FSYS || $2 ~ ("^" FSYS "/") {
   found += 1
   print $0
}
END { print found }' /etc/mnttab

Re: find if under one filesystem other filesystems are mounted

support_billa — Tue, 09 Aug 2011 12:36:20 GMT

great , you improve my awk so perfect that i have following idea :

when i have following filesystem(s)

/filesystem
/filesystem/fs1
/filesystem/fs2

and i want to umount /filesystem , so i have to search for :

/filesystem/fs1
/filesystem/fs2

with

awk -v FSYS="/filesystem" '
BEGIN {found=0}
$2 ~ ("^" FSYS "/") {
found += 1
print $0
}
END { print found }' /etc/mnttab