IBM Storwize V5020 User Manual

Chapter 3. Graphical user interface overview 103
This action displays a list of unfixed errors that are in the event log. For
these unfixed errors, select the error name to begin a guided
maintenance procedure to resolve the errors. Errors are listed in
descending order with the highest priority error listed first. Resolve the
highest priority errors first.
Offline The storage pool is offline and unavailable. No nodes in the system
can access the MDisks. The most likely cause is that one or more
MDisks are offline or excluded.
3.4.4 Internal storage
Click the Internal Storage option in the Pools menu to open a window similar to Figure 3-44.
From this window, you can allocate Redundant Array of Independent Disks (RAID) arrays of
internal disk drives into storage pools. This window also offers the option to display internal
drives, based on their capacity and speed.
Figure 3-44 Internal storage window
Click Actions in the table header, or right-click a specific drive to take the drive offline, show
its properties, update firmware of a single drive (or all under Actions) or mark the drive as
Unused, Candidate, or Spare.
3.4.5 External storage
Before you can add external storage your system has to be in the Replication Layer. This
can be done via the CLI:
chsystem layer replication -cacheprefetch yes/no
If you need to switch it back to storage layer use following command:
chsystem layer storage -cacheprefetch yes/no
Important: In this view, volumes from child pools are shown the same way as volumes
from standard pools. The relationships between the child and parent pools are not visible.

IBM Storwize V5020 Specifications

General

Model	Storwize V5020
Category	Storage
Maximum Number of Drives	240
Form Factor	2U
Supported Protocols	iSCSI
Drive Types Supported	SSD, SAS, NL-SAS
Expansion Units	Up to 9
RAID Levels Supported	0, 1, 5, 6, 10
Host Interface	16 Gb FC, 10 Gb iSCSI
Interface Types	Fibre Channel, Ethernet, SAS
Power Supply	Dual redundant power supplies

Summary

Overview of the IBM Storwize V5000 Gen2 system

IBM Storwize V5000 Gen2 overview

Provides an overview of the Gen2 system, its models, and benefits.

IBM Storwize V5000 Gen2 models

Compares the features and specifications of different Storwize V5000 Gen2 models.

IBM Storwize V5000 Gen2 hardware

Describes the hardware components of the Storwize V5000 Gen2 solution.

Initial configuration

Hardware installation planning

Outlines requirements and checklist for planning hardware installation.

SAN configuration planning

Discusses planning for Fibre Channel SAN connectivity.

First-time setup

Guides through the initial setup process for a first-time IBM Storwize V5000 Gen2 service.

Initial configuration

Details how to complete the initial configuration, including component verification.

Storage pools

Working with internal drives

Describes configuring internal storage disk drives and actions on them.

Working with storage pools

Explains how storage pools are managed and created.

Working with managed disks

Details how to manage MDisks, including their modes and assignments.

Host configuration

Preparing the host operating system

Details steps to prepare Windows and VMware ESXi hosts for attachment.

Creating hosts by using the GUI

Guides on creating Fibre Channel, iSCSI, and SAS hosts.

Volume configuration

Creating volumes using the Volume Creation

Details creating basic, mirrored, custom, and HyperSwap volumes.

Mapping a volume to the host

Guides on mapping created volumes to hosts.

Storage migration

Storage migration wizard overview

Storage migration wizard

Details the steps involved in the storage migration wizard.

Advanced host and volume administration

Advanced host administration

Covers host modification, mappings, and deletion.

Advanced volume administration

Details volume modification and copy creation.

Advanced features for storage efficiency

Easy Tier

Describes the Easy Tier disk performance optimization function.

Thin provisioning

Real-time Compression software

Details the Real-time Compression software for storage efficiency.

Copy services

IBM FlashCopy

Describes the FlashCopy function for point-in-time copies.

Implementing FlashCopy

Remote Copy

Troubleshooting remote copy

HyperSwap

Explains HyperSwap functionality for high availability.

External storage virtualization

Planning for external storage virtualization

Describes planning steps for virtualizing external storage.

Working with external storage

RAS, monitoring, and troubleshooting

Reliability, availability, and serviceability features

Describes RAS features and monitoring.

Configuration backup

Explains how to back up system configuration.

System update

Describes updating node canister software and drive firmware.

Support Assistance

Describes local and remote support assistance.

Collecting support information

Details how to collect support data using GUI and CLI.

Powering off the system and shutting down the infrastructure

Encryption

Planning for encryption

Discusses planning for data-at-rest encryption.

Defining encryption of data at-rest

Activating encryption

Guides on activating encryption licenses.

Enabling encryption

Details enabling encryption using key servers or USB flash drives.

Rekeying an encryption-enabled system

CLI setup and SAN Boot

Command-line interface