Dell PowerFlex Manager 4.6.x CLI Reference Guide

A storage pool is a group of storage devices within a protection domain. Each time that you add devices to the system, you must map them to either storage pools or acceleration pools. Create storage pools before you start adding SDSs and storage devices to the system. You can modify storage pools post-installation using all management clients, except for OpenStack.

Syntax

scli --add_storage_pool (--protection_domain_id <ID> | --protection_domain_name <NAME>) 
  [--storage_pool_name <NAME>] 
  [--use_rmcache | --dont_use_rmcache] 
  [--rmcache_write_handling_mode  {cached | passthrough}] 
  [--media_type {HDD | SSD}] 
  [--external_acceleration <TYPE>] {none | read | write | read_and_write}]
  [--data_layout <LAYOUT> {medium_granularity |fine_granularity}
  [--compression_method <METHOD> {none | normal}]
  (--fine_granularity_acceleration_pool_name <NAME> | --fine_granularity_acceleration_pool_id <ID>)]]
  [--enable_inflight_checksum | --disable_inflight_checksum]
  [--persistent_checksum_enabled | --persistent_checksum_disabled]

Parameters

--protection_domain_id <ID>

Protection domain ID

--protection_domain_name <NAME>

Protection domain name

--storage_pool_name <NAME>

Name to be associated with the new storage pool

--use_rmcache

Use RMcache on all SDSs in the storage pool. You can change this setting later on specific SDSs (they can be individually configured not to use RMcache).

--dont_use_rmcache

Do not use read RAM cache on any SDSs in the storage pool (default)

--rmcache_write_handling_mode <MODE> {cached | passthrough}

Determines whether the system stores the data of this storage pool writes in the SDS read RAM cache, or not. The default is to store the write data in cache (cached). You can change this setting later, using the command set_rmcache_write_handling_mode.

NOTE:Only I/Os that are multiples of 4k bytes can be cached.

--media_type <TYPE> {HDD | SSD}

Media type of the devices in the storage pool, where the devices will all be HDD or SSD.

--external_acceleration <TYPE>

External acceleration for the device where <TYPE> can be one of the following:

none

All devices are not accelerated by a non-PowerFlex read or write cache (default).

read

All devices are accelerated by a non-PowerFlex read cache.

write

All devices are accelerated by a non-PowerFlex write cache.

read_and_write

All devices are accelerated by both non-PowerFlex read and write cache.

--data_layout <LAYOUT> {medium_granularity | fine_granularity}

Indicates the layout of the data for devices in the storage pool, where <LAYOUT> can be medium granularity or fine granularity. The default is medium granularity.

--compression_method <METHOD>

When using fine granularity data layout, this Indicates the compression method to be used. <METHOD> can be one of the following:

none

No compression applied.

normal

Normal compression applied.

--fine_granularity_acceleration_pool_name <NAME>

Name of the NVDIMM acceleration pool to be used for fine granularity.

--fine_granularity_acceleration_pool_id <ID>

ID of the NVDIMM acceleration pool to be used for fine granularity.

--enable_inflight_checksum

Enable inflight checksum protection.

--disable_inflight_checksum

Disable inflight checksum protection.

--persistent_checksum_enabled

Enable persistent checksum protection.

--persistent_checksum_disabled

Disable persistent checksum protection.