IBM XIV User Manual

Creating Storage Pools
Creates a Storage Pool.
pool_create pool=PoolName < size=GB | < hard_size=GB soft_size=GB > >
snapshot_size=GB [ lock_behavior=<read_only|no_io> ]
Parameters:
Name Type Description Mandatory Default
pool Object name Name of the
Storage Pool.
Y N/A
size Positive integer Size of the Storage
Pool (in gigabytes).
N N/A
hard_size Positive integer Hard size of the
Storage Pool
(actual physical
capacity).
N N/A
soft_size Positive integer Soft size of the
Storage Pool.
Soft_size cannot be
less than
hard_size.
N N/A
snapshot_
size
Positive integer Space allocated for
snapshots.
Y N/A
lock_
behavior
Enumeration Sets whether and
how the Pool is
locked upon space
depletion.
N read_only
This command creates a Storage Pool. The name of the Storage Pool must be
unique in the system. Upon creation, the Storage Pool is initially empty and does
not contain volumes.
The size of the Storage Pool is specified as an integer multiple of 10
9
bytes, but the
actual size of the created Storage Pool is rounded up to the nearest integer
multiple of 16x2
30
bytes. The Size parameter is used when hard size and soft size
are identical (no thin provisioning). If only the size is specified, then hard_size and
soft_size are identical to the size. Otherwise, a Storage Pool with thin provisioning
is created.
The created Pool has the following values:
v create_last_consistent_snapshot=yes - meaning the volumes of this Pool can be
mirrored
v protected_snapshot_priority=2 - managing the way last_consistent snapshot are
preserved
When a Storage Pool is defined, the new Storage Pool's capacity is reduced from
the system's free space (hard and soft). This operation fails if the system hard or
soft free space does not have free capacity of at least the size of the new Storage
Pool. The sum of the capacities of all the Storage Pools in the system, together with
the free space, is always equal to the entire system capacity available for the user.
The system allows for the assignment of the entire available capacity to user
created Storage Pools, while leaving the free space at zero size.
124 IBM XIV Storage System User Manual

IBM XIV Specifications

General

Power Supply	Redundant power supplies
Drive Type	SATA
Redundancy	Fully redundant components
Connectivity	Fibre Channel, iSCSI
Form Factor	Rack-mounted
Cache	Distributed cache across modules
Data Protection	Snapshots, remote mirroring
Performance	High throughput and low latency
Scalability	Modular, scale-out architecture
Cooling	Redundant cooling
Architecture	Grid-based, distributed architecture