DS8000_CLI

IBM System Storage™

IBM SystemsDS8000 POWER To Perform |

IBM System StorageTM DS8000 series- Virtualization concepts

Aravindhan Subramanian


2 IBM SystemsDS8000 POWER To Perform |

Agenda

Configuring new fixed block storage

Managing your logical storage configuration

Server decommissioning



Configuring new fixed block storage

Create extent pools

Create Arrays

Create Ranks

Create fixed block volumes

Create volume groups

Configuring fibre channel I/O ports

Creating host port connections



Extent pools

Creating the extent pools before the arrays and ranks saves a processing step

Each extent pool is defined with the rank group of 0 or 1 and a storage type of fb.

Create extent pool

– dscli>mkextpool -dev IBM.2107-75FA120 -rankgrp 0 -stgtype fb P0

Verify that the extent pool has been created

– dscli>lsextpool -dev storage_image_ID -l



Arrays

Find the arraysite that are in the un-assigned state

– dscli>lsarraysite -dev storage_image_ID -state unassigned

Create the array with RAID type

– dscli>mkarray -dev storage_image_ID -raidtype [5 | 10] -arsite array_site

Make sure the array is created

– dscli>lsarray –l (or) dscli>lsarraysite -l



Ranks

A rank is a logically contiguous storage space that is made up of one array

The rank configuration state is unassigned until it is assigned to an extent pool.

Note: You can assign a rank to an unassigned array and also assign the rank to an extent pool at the same time if you have already created the extent pools and the arrays. Creating extent pools first saves a step in the configuration.

Listing out arrays with unassigned state

– dscli>lsarray -dev IBM.2107-75FA120 -state unassigned

Creating Rank

– dscli>mkrank -dev IBM.2107-75FA120 -array A44 -stgtype fb -extpool p1

Verify that the rank is created

– dscli>lsrank -dev IBM.2107-75FA120 -l



Volumes

To View your list of fixed block extent pool IDs

– dscli>lsextpool -dev IBM.2107-13AAD7A -stgtype fb -l

To view the available address group

– dscli> lsaddressgrp -dev IBM.2107-75FA120 -l

Select a address group that can used for the creation of volumes

To view the LSS available in that address group

– dscli> lslss -addrgrp 2

Determine which lss id to use

To view the volumes already created in that lss issue the command

– dscli> lsfbvol -lss 20

create the fb volume

– dscli>mkfbvol -dev IBM.2107-75FA120 -extpool P1 -name finance#d -cap 8.6 0100-010F



Volume Group

To create a volume group

– dscli>mkvolgrp -dev IBM.2107-75FA120 -hosttype pSeries -volume 0001-0010,0120 my_nickname

To check if the volume group is created properly

– dscli>lsvolgrp -dev IBM.2107-75FA120 –l

We can use “hosttype” (or) “type”

– dscli> mkvolgrp –dev IBM.2107-75amar1 –type scsimap256 – volme 230C DCASESX001_VG

Types

– scsimask,scsimap256,scsiall,os400all,os400mask,ficonall



Host connection

To create a host connection

– dscli>mkhostconnect -dev storage_image_ID -wwname wwpn -hosttype host_type -volgrp volume_group_ID -ioport port_ID host_name



Managing your logical storage configuration

Extent pool

Arraystie

Array

Rank

LSS

Volumes



Extent pool

Modifying an extent pool

– dscli>chextpool -dev storage_image_ID -name new_extent_pool_name -extentlimit [on | off] -limit extent_limit_percentage -threshold extent_threshold_percentage -extentpool_ID

– extentlimit – Whether to limit the extent allocation as specified in the limitextent_limit_percentage

– threshold – minimum no of extents that should be available

Viewing extent pool status

– dscli>showextpool -dev storage_image_ID extentpool_ID (or) lsextpool –dev storage_image_ID extentpool_ID

Viewing extent pool performance metrics

– dscli>showextpool -dev storage_image_ID -metrics extentpool_ID



Extent pool

Deleting an extent pool

The volumes associated with the extent pool must be removed.

The logical control units (LCUs) that are associated with the extent pool must be removed. ( For CKD only)

The ranks that are assigned to the extent pool must be unassigned or removed.

The arrays that are assigned to the extent pool must be removed.

– dscli>rmextpool -dev storage_image_ID extentpool_ID



Arraysite

To view individual DDMs

– dscli>lsddm -l storage_image_ID

To view array site status

– dscli>showarraysite storage_image_ID -fullid site_ID



Array

Viewing the status of array / arrays

– dscli>lsarray -dev storage_image_ID -l

– dscli>lsarray -dev storage_image_ID -l -state unassigned

– dscli>lsarray -dev storage_image_ID -l -state assigned

Viewing properties of one array

– dscli>showarraysite -dev storage_image_ID site_ID

Removing arrays

– Host I/O access to the volumes should be stopped

– The associated volume groups should be removed

– The volumes to be removed

– The ranks must have been removed

– dscli>lsarray -dev storage_image_ID -state unassigned

– dscli>rmarray -dev storage_image_ID array_ID



Rank Adding a rank to an extent pool

– dscli>chrank -dev storage_image_ID -extpool extentpool_ID rank_ID

To designate the rank as reserved

– dscli>chrank -dev storage_image_ID -reserve rank_ID

– Once a rank is designated as reserved, the extents associated with that rank are not used for allocation, but the already allocated extents remain intact

To release a rank from it’s designated reserved status

– dscli>chrank -dev storage_image_ID -release rank_ID

To remove the rank from the extent pool, but not delete it

– dscli>chrank -dev storage_image_ID -unassign rank_ID

Viewing rank status

– dscli>lsrank -dev storage_image_ID -l

– dscli>showrank -dev storage_image_ID rank_ID



Rank - Continued

Removing (or) deleting a rank

– Host access to be stopped

– Associated volume group to be removed

– Associated volumes to be removed

– dscli>rmrank -dev storage_image_ID rank_ID

Documents

DS8000_CLI