How do you determine what directories live in what volume when you view the Logical Volume Management program?

Posted on 2008-10-24
Last Modified: 2013-12-16
I have a VOLGroup 00 Physical View defined as follows:

The Logical View is defined as
VolGroup 00

How do I determine where my files actually live.  I have a /u/master1/data and a /u/master2/data and other directories that I need to understand where they live.  Can someone show me how to determine this information?
Question by:kwh3856
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LVL 29

Expert Comment

ID: 22799045
when you have setup your partition
you must of did this

LogVol00 for /var
logVol01 for /home

is not it ??

if you do df -h
what do you  see ??

Author Comment

ID: 22823996
I will check this tomorrow and let you know.  Thank you very much for your reply.


Author Comment

ID: 22834255
[root@123]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00             528G   11G  491G   3% /
/dev/cciss/c0d0p1                                             99M   13M   81M  14%  /boot
tmpfs                                                                     5.9G     0  5.9G   0%     /dev/shm

This is what I get.

Is there a way to divide the VolGroup00 into seperate volume and then create directories on those volumes?

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LVL 29

Expert Comment

ID: 22834635
ok what happended here is:
when you installed your OS, you chose to use lvm for everything.

so currently /var,/home/ and other directory is in one logical volume.

what i do is always:
i put /var,/home,/usr  in different volume so it would be like this

/dev/mapper/VolGroup00-LogVol00             528G   11G  491G   3% /
/dev/mapper/VolGroup00-LogVol01             528G   11G  491G   3% /
/dev/mapper/VolGroup00-LogVol02             528G   11G  491G   3% /
/dev/cciss/c0d0p1                                             99M   13M   81M  14%  /boot

benefits is: if suppose /home is require more space, i will just add another hardrive or if there is any emptry space in other logical volume, i will use that one and extend /home logical volume .

now your problem is, everything is in One logical volume

now you can create other volume as well , but do you have any extra space in your physical volume??

Author Comment

ID: 22834689
No.  I used all the space when I installed the system.  Is there any drawbacks to this configuration?  I currently have 12 drives in my system.  It seems that every thing is spread out across those drive which would give me I belive that best performance.  If I am not worried about space, this it should not be a big deal.  Is that correct?


LVL 29

Accepted Solution

fosiul01 earned 500 total points
ID: 22834741
ok you are using Scsi hardrive is not it ??

technicaly there is no draw backs of this configuraiton.
benefits is : if any drive needs extra space its will increase automatically within the logical volume. if you are running out of space just increase your dirves and increase your logical volumes


Author Comment

ID: 22834776
That is excactly what I needed to know.  Thank you very much.
LVL 29

Expert Comment

ID: 22834801
you are welcome

Author Closing Comment

ID: 31509776
Thank you very much.


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