Issue with free space on the disk - uses MHVTL

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Issue with free space on the disk - uses MHVTL

Rachev88
Hello All,

I uses MHVTL on Centos 6.3 2.6.32-179.11.1.el6.x86_64, which is a virtual machine on vmware workstation 9.
It has 2 virtual disks:
First disk is not preallocated and its size is 20GB on which is installed the OS. [vdisk1]
Second one was added after the installation of the MHVTL its size is 200GB and it is preallocated vdisk. [vdisk2]

vdisk2 is mounted as /opt on the centos, because /opt contains the folde /mhvtl which contains the virtual tapes of the library.
As a backup software I use Data Protector.

When I start some backups I noticed that the whole size of the virtual machine was extended.
I checked the free space on the centos and there are enough free space, but when I started some backups the real disk of my real machine run out of free space.

the capacity of the real disk is 400GB, current VM has to be 220GB, I have another VMs which are stopped now and the all free space that I must have on the real disk is about 100GB, but as I said above the disk run out of free space when I performed some backups and the size of the VM  which contains the mhvtl is extended.

Could you please help me?
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Re: Issue with free space on the disk - uses MHVTL

Rachev88
Hello All,

I created and new virtual machine with same parameters, but with 2 preallocated vdisks [20GB and 200GB].
I installed and configured the MHVTL again.
Some backups were started to check if this will help me, but issue still persist.
The size of the VM machine was extended and the rest free space of my real disk decreases.
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Re: Issue with free space on the disk - uses MHVTL

Mark Harvey
Administrator
Let me confirm your problem.

When you have mhVTL configured in a virtual machine, the host system runs out of disk space ?

What does VMWare say about this ?

After all, it's VMWare which allocates space on the host OS.. You should not exceed amount of space allocated for the virtual disk. (+ overhead for ram etc )

Perhaps you have COW snaphot configured.. Where each changed block is being copied.. But even that would only take 2x disk space..
Regards from Australia
Mark Harvey
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Re: Issue with free space on the disk - uses MHVTL

Rachev88
Hello Mark,

First thank you for your reply.

About your first question:When you have mhVTL configured in a virtual machine, the host system runs out of disk space ?
The answer is yes my host run out of disk space.

About the second one I checked but I didn't find anything, could you be more specific where I could check this.

Thank you in advance.
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Re: Issue with free space on the disk - uses MHVTL

Rachev88
In reply to this post by Mark Harvey
If you want I could provide you the log of the VM, because I am no familiar what exactly I have to look for.
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Re: Issue with free space on the disk - uses MHVTL

Rachev88
In reply to this post by Rachev88
I think that I found the issue and I think that you are right about the vmware.
As I said the MHVLT is installed and configured on centos6.3 which is a VM on vmware workstaion 9, on my Windows XP, the other machine which I backed up are at the different real machine and I think that the centos vmdisk which mhvlt use it is not seen by the other real machine and it doesn't know that there is a vmdisk and for that it use the free space of the real disk.

Am I right?
If yes could some one help me how to fix this.
Is there any other way except to create the centos with thin disk and to use all space which i have on the real disk.