HP 345646-001 - StorageWorks NAS 2000s External Storage... Istruzioni per l'installazione e il funzionamento

Application Note

hp StorageWorks

Online Volume Growth

Product Version: 1

First Edition (May 2004)

Part Number: 372413-001

This application note summarizes important information regarding OVG provided with the HP StorageWorks

Service Release 1 not covered in other documents.

For the latest version of these Application Notes and other NAS server documentation, access the HP storage

web site at:

http://www.hp.com/country/us/eng/prodserv/storage.html

2OVG Application Notes

Hewlett-Packard Company makes no warranty of any kind with regard to this material, including, but not limited to, the implied

warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for

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statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP

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Hewlett-Packard Company shall not be liable for technical or editorial errors or omissions contained herein. The information is provided

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set forth in the express limited warranty statements for such products. Nothing herein should be construed as constituting an additional

warranty.

OVG Application Notes

First Edition (May 2004)

Part Number: 372413-001

About this document

3OVG Application Notes

About this document

This section describes the content reflected in this document, including:

■Intended audience, page 3

■Other documentation, page 3

■Requirements, page 3

■Installation, page 5

■VDS configuration settings, page 6

■VDS configuration utility, page 6

Intended audience

This document is intended for customers who have installed the HP StorageWorks Service

Release 1.

Other documentation

Additional documentation, including white papers and best practices documents, are available

via the HP web site at:

http://www.hp.com

Overview

The Online Volume Growth (OVG) feature provided with the HP NAS Service Release 1,

provides the ability to expand a virtual disk on Windows Server 2003 without a reboot through

use of Microsoft VDS (Virtual Disk Service).

Caution: Although OVG is supported on the EVA 5000 with a HP NAS server, make sure

that you have read all of the accompanying documentation and understand the

requirements and known issues associated with OVG.

Requirements

Currently, OVG is only supported on the HP NAS 4000s and 9000s with an EVA 5000

attached. In addition, Microsoft Virtual Disk Service (VDS) is also required. To utilize VDS,

the HP StorageWorks VDS Hardware Provider must be installed. The HP VDS Hardware

Provider enables volume and logical unit management of HP arrays from a central

management console on the NAS. VDS provides a single interface for managing block storage

virtualization.

To download the HP StorageWorks VDS hardware provider and installation guide, go to:

http://www.hp.com/support/vdsvss

Requirements

4OVG Application Notes

Hardware requirements

The following components are required for OVG on a NAS server:

■HP StorageWorks EVA 5000 disk array with a SAN Management Appliance (SMA)

running CommandView EVA

■Ethernet connection between the EVA 5000 and the CommandView EVA workstation.

The hardware providers use ports 12301 and 2301, and these ports must be free and

available in order for the Hardware Providers to function.

■SAN fabric must be in place

Known issues

The following known issues exist when using OVG on the NAS:

■Only single-head systems are supported; clusters are not supported at this time.

■Only a single EVA can be attached to the SAN Management Appliance (SMA). Multiple

EVAs cause extended query times and inconsistent operation.

■Only basic disks can be extended; dynamic volume LUNs will be extended but will record

an error when trying to extend the volume.

Note: Dynamic volumes can be extended using Disk Manager.

■Only simple and spanned dynamic volumes can be extended.

Possible issues

The following may slow or prevent OVG from working properly on the NAS:

■Ports 12301 or 2301 unavailable

■A slow firewall between the EVA 5000 and the CommandView EVA workstation

■The HP Open View Storage Management Appliance with VCS 3.0 and CommandView

EVA version 3.0a

■Hardware Provider production server running Windows 2003

■Excessive traffic on the Ethernet

Note: Your HP account representative can assist you in determining the supported configurations for

your system.

Installation

5OVG Application Notes

Installation

Installation requires two separate installation procedures:

■OVG

■Virtual Disk Service (VDS)

Installing OVG

During the installation of Service Release 1, the option to install the OVG feature is given. The

default is not to install OVG. Click the check box to install OVG.

Installing the Virtual Disk Service (VDS)

Installing the VDS Hardware Provider on an EVA disk array enables all of the VDS

management features of storage virtualization.

VDS Requirements

■The primary LUN to be managed by the hardware provider services must be visible to the

NAS system where the providers are installed.

■The VDS hardware provider user account must have administrator privileges for

CommandView EVA.

Note: The installation instructions provided with the downloaded file state that Volume Shadow

Copy Service (VSS) must be installed first and that BUSINESS COPY must also be available. This is

an XP requirement and can be ignored for NAS installations.

To install the VDS Hardware Provider:

1. Download the HP VDS Provider from:

http://www.hp.com/support/vdsvss

2. Double-click hp_StorageWorks_vss_vds_hardware_providers.exe to

extract the program files.

3. Double-click hp StorageWorks VDS Hardware Provider for EVA.msi to

launch the installer.

4. Accept the licensing agreement and install the product in the default location.

5. Follow instructions on screen. When requested,

a. Enter the IP address of the Storage Management Appliance (SMA).

b. Click Logon, then enter User name and password (Default: administrator:

administrator).

c. Select Enterprise Virtual Array (EVA) Storage System.

d. Add the disk groups which OVG will use to the selected disk groups.

Note: If logon fails, reboot both SMA and NAS servers until a logon completes

Using Online Volume Growth

6OVG Application Notes

VDS configuration settings

At the Configuration Utility, enter the appliance IP address for management of the EVA disk

array and click the Logon button. This will populate the other fields on this screen with disk

group information. Choose one disk group to add to the selected disk groups field.

This is the disk group that will be used for VDS activities.

Figure 1: VDS configuration utility

Using Online Volume Growth

OVG offers three separate features for LUN management:

■LUN Creation

■LUN Expansion

■LUN Deletion.

Figure 2: OVG screen of WebUI

Using Online Volume Growth

7OVG Application Notes

Special considerations when using OVG

■Large EVA configurations may take large amounts of time to load on the HP

StorageWorks NAS screen. During this time, there will be no system activity.

■When creating a LUN using OVG, there is a minimum of 1 GB required for the LUN size.

■Ensure that the disk group contains enough free space before using OVG to extend a LUN

LUN creation

To create a LUN:

1. Click the Create LUN from the Tasks Column.

2. Select the RAID protection level.

3. Enter the desired LUN size (GB).

4. Click OK.

Expanding a LUN

To expand a LUN:

1. Select the LUN to be expanded.

2. Click the Extend LUN button.

3. Enter the additional size in GB.

4. Click OK.

Deleting a LUN

Note: Deleting a LUN can take a few minutes. While the LUN is being deleted no system activity will

be provided on screen.

To Delete a LUN:

1. Select the LUN to be deleted.

2. Click the Delete LUN button.

Caution: Deleting a LUN will delete all data on that LUN permanently.

3. Confirm the deletion of the LUN by clicking the OK button.

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