What happens to existing data after adding more disks to the pool?

Shivandand,

Your answer implies there is no way to extend the pool.  Is this correct?  If I have data on, let's say three LUN's in a particular pool, and LUN one is provisioned as 2TB and is getting full.  It would seem you're saying there is no way to extend this current LUN.  The only option is to create a new LUN and store new data there, is this correct?

Regards
Mark

Hi Mark,

No, once you add the disk groups to the system you will get a option to add the disks either to existing pool or to create a new pool from the new drives being added. By adding disks to existing pool ie to the pool which is nearing full capacity you will get new space.

eg "test" pool is 200GB available, when you add  new 5 disks (2TB) to the system (to "test" pool). The "test" pool will now be 2.2 TB space. Hope I answered your query.

Regards

Shivanand

I get that the "pool" will now have access to the new space.  What about the provisioned "LUN"?  I may be using the incorrect terms here, allow me to elaborate on how I, currently, understand the system.

Storage Pools are groups of disks, grouped by performance.  The "Performance Pool" would have high performance disks, likely 15k disks.  A "Storage Pool" would have slower drives.

Once you have "pools" defined, you "slice up" or "partition" the pool space for specific uses such as, MS Exchange, VMWare, or Shared Folders.

Let's say we've provisioned a space ( within a pool) for Shared Folders and given that space 2TB.
I think of the data as siting inside a POOL inside a Partition, and finally inside a Folder.

Now, let's say that space, the Shared Folder has become full and there is no more space in the rest of the POOL, so you decide to add disks.

If I add disks, can I add them to the existing POOL (assuming they are of the same speed), then extend a Shared Folder to use the extra space?

Thanks again!

Mark

Hi Mark,

Yes, you will be able to extend the Shared folder to use the extra space.

Note: You can add disks to the existing pool provided they match the disk type (SAS/NL-SAS, Size & Make).

Regards

Shivanand

it seems this will apply to iscsi virtual disks as well.  There would be a limit of 2 tb on the lun tho.

i found this under

Overview and storage system basics > Storage system basics > Generic iSCSI storage > iSCSI storage

resources and virtual disks

After you create a generic iSCSI virtual disk, you can
increase its size of any of its virtual disks, but you cannot decrease the size
of the virtual disks.

and also for hyper-v

After you provision a Hyper-V datastore, you can increase but not reduce the

quantity of storage allocated for the resource

Thanks, Shivanand.

Hi Samuels,

You are correct, this applies to all the data types (CIFS/NFS/iSCSI) on the VNXe.

Regards

Shivanand

Hey, Shivanand said is correct.

1. The size of the pool will be increased. There is no any impact for original data. When create storage resource, it will created on new drives.

2. VNXe supports configure disks from different enclosures. So, you don't need to avoid that.

Hope this helps!