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February 17th, 2010 10:00

Can 2 File Systems sit on the same MetaVolume ?

I have a NS700G which takes storage from a DMX with 17 GB HVs.

I have a user that wants 2 x 10 GB NFS "exports" from the Celerra NAS.

So, I want to create a "striped metavolume" that consists of 2 x 17 GB disks (34 GB). 

Can I put the 1st file system on the "top" of the "Striped Metavolume", and then put the 2nd file system on the bottom half of the SAME "striped metavolume"?:

# nas_fs -name firstFS create size=10G mtv1

# nas_fs -name secondFS create size=10G mtv1

i.e. - can 2 x FileSystems sit on 1 x MetaVolume?

     Stuart

366 Posts

February 17th, 2010 12:00

Hi,

yes, you can. If you want to use MVM ( Manual Volume Management ), create two slices of 5GB on each dvol, then stripe them togehter, then create a metavolume, then the filesystem. You will be able to use the free space to create the second filesystem.

Another option is to use the AVM ( Automated Volume Management ), and enable the default_slice_flag on the system pool ( possibly symm_std ). It will automatically slice the disks before create the filesystems, so you will use all the capacity of the disks.

Gustavo Barreto.

48 Posts

February 17th, 2010 12:00

Hi,

yes, you can. If you want to use MVM ( Manual Volume Management ),

create two slices of 5GB on each dvol, then stripe them togehter, then

create a metavolume, then the filesystem. You will be able to use the free

space to create the second filesystem.

These are two different ways to create two filesystems on the metavolume:

- create two slices out of the metavolume and create therein the filesystems

or

- create a storage-pool (with nas_pool) with the metavolume and create your

filesystems within that pool.

The second one is the way I'm working on my boxes.

63 Posts

February 17th, 2010 13:00

So, it appears that only and exactly 1 FileSytem can sit on one MetaVolume.  Is that correct?

674 Posts

February 17th, 2010 22:00

A Celerra Metavolume is only used by one FS.

If you want to create two FS you have to create/use two Celerra Metavolumes.

63 Posts

February 18th, 2010 05:00

Thanks!
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