find if under one filesystem other filesystems are mounted

[support_billa]

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,                    

                                                             

[Dennis Handly]

>if under one filesystem other filesystems are mounted?

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

[Doug O'Leary]

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

do

   echo ${mp}

   umount ${mp}

done

HTH;

Doug O'Leary

[Naj]

Hi,

I agree with Dennis, you may look into both file

[James R. Ferguson]

---

@support_billa wrote:

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

---

This is correct.

Regards!

...JRF...

[Dennis Handly]

>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.

[Johnson Punniyalingam]

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

[Hiren N Dave]

>> 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,

HD

[support_billa]

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

[support_billa]

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