Delete a Celerra Pool

I want to delete a Celerra pool as it is not being used. This is a "System" pool and not a "User" generated pool. Do I need to shrink the pool first and then delete the pool OR I can go ahead and delete the entire pool itself from GUI and the volumes will also get deleted?

If I shrink a the pool by seleting the volume, will the volumes get deleted and the "nas_disk -l " will show the assossiated disks are unused and then I can delete them will -perm and -unbind option?

The cli manual says, use   -delete with -deep option and it recursively deletes each member of the storage pool. Should I use that option to delete the entire pool instead of deleting from GUI?

[nasadmin@canas012 ~]$ nas_pool -size clar_r5_economy

id           = 2

name         = clar_r5_economy

used_mb      = 0

avail_mb     = 3102459

total_mb     = 3102459

potential_mb = 0

[nasadmin@canas012 ~]$ nas_pool -info clar_r5_economy

id                   = 2

name                 = clar_r5_economy

description          = CLARiiON RAID5 8plus1

acl                  = 0

in_use               = False

clients              =

members              = v6053,v6054,v6258,v6262,v6795,v6796,v6797,v9023

default_slice_flag   = True

is_user_defined      = False

virtually_provisioned= False

disk_type            = CLSTD

server_visibility    = server_2,server_3,server_4,server_5

volume_profile       = clar_r5_economy_vp

is_dynamic           = False

is_greedy            = False

num_stripe_members   = 4

stripe_size          = 32768

[nasadmin@canas012 ~]$

Thanks in Advance.