IBM Elastic Storage System 3000 User Manual

upgrade, it is recommended to perform this operation during a period of low workload stress. Existing
customer recovery group and le system data are preserved during the MES upgrade.
Supported upgrade path: 12 NVMe ESS 3000 -> 24 NVMe ESS 3000
Prerequisites
• All new or existing building blocks must be at the ESS 5.3.5.2 or ESS 3000 6.0.0.2 level. If the setup has
any protocol nodes, these nodes must also be upgraded to ESS 5.3.5.2 levels (underlying code IBM
Spectrum Scale 5.0.4.3 must be veried by using the gssinstallcheck or essinstallcheck
command).
• The system must be healthy before the ESS 3000 storage MES upgrade.
• The existing ESS 3000 must be a properly installed 12 NVMe system with 12 NVMe drives correctly
located in slots 1 - 6 and 13 - 18.
• If the canister servers are allocated as quorum servers, understand the implications of losing a quorum
server on one canister server at a time during this operation. If you do not want to lose the quorum,
move the quorum to different servers during this procedure.
• It is recommended to wear an ESD wrist band when you work on the hardware, for example, inserting
NVMe drives.
MES upgrade considerations
GPFS uses preferentially the new network shared disks (NSDs) to store data of a new le system. GPFS
has four new NSDs that are the same as the four original NSDs and the workload on each server is the
same as it was before. The new le system data goes to the four new NSDs, like before the resizing, the
original le system data goes to the four original NSDs. Consider the necessity of restriping and the
current demands on the system. New data that is added to the le system is correctly striped. Restriping
a large le system requires many insert operations and delete operations, which might affect the system
performance. Restripe a large le system, when the system demand is low.
Concurrent MES upgrade steps
1. Ensure that the technical delivery assessment (TDA) process is complete before you start the MES
upgrade.
2. Ensure that the system is at the ESS 3000 6.0.0.2 level for the storage MES.
3. If losing quorum on each canister server during MES upgrade causes an issue with the customer
conguration, move the quorum to other supported nodes in the system.
4. Ensure that the 12 new NVMe drive FRUs are of the same capacity as the original 12 NVMe drives.
5. Insert the 12 new NVMe drive FRUs into slots 7 - 12 and 19 - 24.
Do not move the original 12 NVMe drives to different slots!
6. Verify the new 24 NVMe disk topology on both canisters by issuing the following command:
# mmvdisk server list --disk-topology --node-class this ESS 3000 node class
Example
[ess3ka ~]# mmvdisk server list --disk-topology --node-class ess_x86_64_mmvdisk_5_mySN
node needs matching
number server attention metric disk topology
------ -------------------------------- --------- -------- -------------
21 ess3ka-ib.example.net no 100/100 ESS3K SN0 24 NVMe
22 ess3kb-ib.example.net no 100/100 ESS3K SN0 24 NVMe
• Both canisters must show a 24 NVMe disk topology.
• If any errors such as a new disk is bad or does not show up are reported, the errors must be xed
before proceeding.
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IBM Elastic Storage System 3000: Service Guide

IBM Elastic Storage System 3000 Specifications

General

Brand	IBM
Model	Elastic Storage System 3000
Category	Storage
Language	English

Summary

About this information

Who should read this information

Identifies the intended audience for the documentation and the system.

IBM Elastic Storage System information units

Details the different documentation components for the ESS 3000 system.

Related information

Provides references to other relevant IBM documentation and resources.

Conventions used in this information

Explains typographic and command-line conventions used throughout the document.

How to submit your comments

Provides contact information for submitting feedback on the documentation.

Chapter 1. Events

Array events

Lists and describes events related to the Array component of the system.

Canister events

Lists and describes events related to the Canister component of the system.

Enclosure events

Lists and describes events related to the Enclosure component of the system.

Physical disk events

Details events associated with physical disk failures and status.

Recovery group events

Lists and describes events related to the Recovery Group component.

Server events

Details events related to server hardware components and their status.

Virtual disk events

Lists and describes events related to the Virtual disk component.

Chapter 2. Servicing

Removing and replacing a drive

Procedure for removing and replacing a faulty drive in a node canister.

Removing and replacing a drive blank

Instructions for replacing drive slot fillers to maintain airflow.

Removing and replacing a power supply unit

Guide for replacing hot-swap redundant power supply units (PSUs).

Removing and replacing a power interposer

Procedure for removing and replacing the power interposer.

Miscellaneous equipment specification (MES) instructions

Instructions for hardware changes, additions, or improvements using MES.

Chapter 3. Part Listings

CRU part number list

Lists Customer Replaceable Unit (CRU) part numbers and descriptions.

FRU part number list

Lists Field Replaceable Unit (FRU) part numbers and descriptions.

Cable part number list

Provides a list of part numbers for various system cables.

Accessibility features for the system

Accessibility features

Highlights major accessibility features available in IBM Spectrum Scale RAID.

Keyboard navigation

Describes the use of standard Microsoft Windows navigation keys for interaction.

IBM and accessibility

Provides information on IBM's commitment to accessibility and related resources.

Notices

Trademarks

Glossary