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samuk
Enthusiast
Enthusiast

VM with a 2TB disk

Hi,

I am about to create a VM that will need a 2TB disk attached to it.

How will this work when i need to use Veeam to create a backup using snapshot? as this disk will be in a datastore size of 2TB which is the maximum allowed?

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4 Replies
Troy_Clavell
Immortal
Immortal

you can create a snapshot, assuming your block size of the LUN it's on is 8MB, which if you are creating a 2TB disk, it probably is.  Once exception.... If you have a different LUN for OS and data, and the OS drive is a smaller block you won't be able to snapshot the guest.

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samuk
Enthusiast
Enthusiast

Little confused, are you saying  the os drive and the 2TB LUN must be on the same datastore for the Snapshot to work?

i was going to put them on seperate.

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Troy_Clavell
Immortal
Immortal

the snapshot is created on the base disk, so if you have OS and data on a diffent LUN, and the OS lun is anything less that an 8MB block size, you won't be able to create a snapshot.

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ephillipsme
Enthusiast
Enthusiast

If the LUN with the first VMDK file does not have a 8 MB block and you have issues snaphotting the large 2 TB vmdk file, you can repoint the working directory to where you want the snapshot to be created.  You need to edit the vmx file of the VM.  This will allow you to have the snapshots create on a LUN of your choice and not nessissarily the LUN that has the OS vmdk file.

change the line below in tghe VM .vmx file to the path of the datastore you want the snapshot file created in.

WorkingDir="<new_path_location>"

after you will need to unregister and then bring the VM back into inventory for the ESX to accept this change.

Ernie

~Ernie
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