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Hitachi Virtual Storage Platform G1000

Hitachi Volume Shredder User Guide

MK-92RD8025-01

Hitachi Virtual Storage Platform G1000 Hitachi Volume Shredder User Guide

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Hitachi, Ltd., reserves the right to make changes to this document at any time without notice and assumes

no responsibility for its use. This document contains the most current information available at the time of

publication. When new or revised information becomes available, this entire document will be updated and

distributed to all registered users.

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product announcement for information about feature and product availability, or contact Hitachi Data

Systems Corporation at https://portal.hds.com.

Notice: Hitachi, Ltd., products and services can be ordered only under the terms and conditions of the

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the terms of your agreements with Hitachi Data Systems Corporation.

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iii

Hitachi Virtual Storage Platform G1000 Hitachi Volume Shredder User Guide

Contents

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Intended audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Product version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Document revision level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Changes in this revision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Referenced documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Document conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Convention for storage capacity values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .viii

Accessing product documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .viii

Getting help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .viii

Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .viii

1 Overview of Hitachi Volume Shredder . . . . . . . . . . . . . . . . . . . . . 1-1

Data security practices and Volume Shredder . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Supported volume types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Volume Shredder operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Shredding times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

2 Volume Shredder operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Workflow for shredding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Blocking a volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Blocking volumes in a parity group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Calculating the number of overwrite passes for flash drives . . . . . . . . . . . . . . . 2-4

Example of shredding data on flash drives . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Calculating the number of overwrite passes for FMDs . . . . . . . . . . . . . . . . . . . 2-5

Example of shredding data on FMDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Defining shredding conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Shredding a volume. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Shredding volumes in parity groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Viewing shredding status with the Tasks window . . . . . . . . . . . . . . . . . . . . . . 2-9

Viewing shredding status with the Logical Devices window . . . . . . . . . . . . . . 2-10

Hitachi Virtual Storage Platform G1000 Hitachi Volume Shredder User Guide

Stopping a shredding operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Viewing shredding results with the Tasks window . . . . . . . . . . . . . . . . . . . . . 2-11

Viewing shredding results in the compressed files . . . . . . . . . . . . . . . . . . . . 2-12

A Volume Shredder GUI reference . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Shred LDEVs wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Shred LDEVs window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Shred LDEVs wizard Confirm window . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Edit Shredding Data Pattern window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Index

Preface v

Hitachi Virtual Storage Platform G1000 Hitachi Volume Shredder User Guide

Preface

This guide describes and provides instructions for Hitachi Volume Shredder

secure erase software for the Hitachi Virtual Storage Platform G1000

storage system.

Read this document carefully to understand how to use this product, and

maintain a copy for reference purposes.

This preface includes the following information:

□Intended audience

□Product version

□Document revision level

□Changes in this revision

□Referenced documents

□Document conventions

□Convention for storage capacity values

□Accessing product documentation

□Getting help

□Comments

Hitachi Virtual Storage Platform G1000 Hitachi Volume Shredder User Guide

vi Preface

Intended audience

This document is intended for system administrators, HDS representatives,

and authorized service providers who install, configure, and operate the

Hitachi Virtual Storage Platform G1000 storage system.

Readers of this document should be familiar with the following:

• Data processing and RAID storage systems and their basic functions.

• The Hitachi Virtual Storage Platform G1000 storage system and the

Hitachi Virtual Storage Platform G1000 Hardware Guide.

• The Hitachi Command Suite software or the Hitachi Device Manager -

Storage Navigator software for the Hitachi Virtual Storage Platform

G1000 storage system and the Hitachi Command Suite User Guide or

the Mainframe System Administrator Guide.

• Data protection and security practices in enterprise storage

environments, including data retention, archival, and shredding.

Product version

This document revision applies to Hitachi Virtual Storage Platform G1000

microcode 80-01-4xor later.

Document revision level

Changes in this revision

• Added information about using Hitachi Command Suite to perform

Volume Shredder operations.

Referenced documents

Hitachi Virtual Storage Platform G1000 documents:

•Hitachi Virtual Storage Platform G1000 Hardware Guide, MK-92RD8007

•Hitachi Virtual Storage Platform G1000 Provisioning Guide for Open

Systems, MK-92RD8014

•Hitachi Virtual Storage Platform G1000 Mainframe System Administrator

Guide, MK-92RD8016

•Hitachi Command Suite Messages, MK-92RD8017

Document conventions

This document uses the following terminology conventions:

Revision Date Description

MK-92RD8025-00 April 2014 Initial release

MK-92RD8025-01 August 2014 Supersedes and replaces MK-92RD8025-00

Preface vii

Hitachi Virtual Storage Platform G1000 Hitachi Volume Shredder User Guide

This document uses the following typographic conventions:

The following table lists note icons that might appear in this document.

Convention Description

Hitachi Virtual Storage

Platform G1000

Refers to all models of the Hitachi Virtual Storage Platform

G1000 storage system, unless otherwise noted.

Convention Description

Bold Indicates the following:

• Text in a window or dialog box, such as menus, menu

options, buttons, and labels. Example: On the Add Pair

dialog box, click OK.

• Text appearing on screen or entered by the user. Example:

The -split option.

• The name of a directory, folder, or file. Example: The

horcm.conf file.

Italic Indicates a variable, which is a placeholder for actual text

provided by the user or system. Used for variables in regular

text. Example: copy source-file target-file

Monospace Indicates text that is displayed on screen or entered by the

user. Example: # pairdisplay -g oradb

< > angle brackets Indicates a variable, which is a placeholder for actual text

provided by the user or system. Used for variables in

monospace text. Example: # pairdisplay -g <group>

[ ] square brackets Indicates optional values. Example: [ a | b ] indicates that you

can choose a, b, or nothing.

{ } braces Indicates required or expected values. Example: { a | b }

indicates that you must choose either a or b.

| vertical bar Indicates that you have a choice between two or more options

or arguments. Examples:

[ a | b ] indicates that you can choose a, b, or nothing.

{ a | b } indicates that you must choose either a or b.

Icon Meaning Description

Tip Provides information, guidelines, or suggestions for

performing tasks more effectively.

Note Calls attention to additional information.

Caution Warns that failure to take or avoid a specified action can

result in adverse conditions or consequences (for example,

loss of access to data).

WARNING Warns that failure to take or avoid a specified action can

result in severe conditions or consequences (for example,

loss of data).

Hitachi Virtual Storage Platform G1000 Hitachi Volume Shredder User Guide

viii Preface

Convention for storage capacity values

Physical storage capacity values (for example, data drive capacity) are

calculated based on the following values:

Logical storage capacity values (for example, logical device capacity) are

calculated based on the following values:

Accessing product documentation

The Hitachi Virtual Storage Platform G1000 user documentation is available

on the Hitachi Data Systems Portal: https://portal.hds.com. Please check

this site for the most current documentation, including important updates

that may have been made after the release of the product.

Getting help

The Hitachi Data Systems customer support staff is available 24 hours a

day, seven days a week. If you need technical support, log on to the Hitachi

Data Systems Portal for contact information: https://portal.hds.com

Comments

Please send us your comments on this document [email protected].

Include the document title and number, including the revision level (for

example, -07), and refer to specific sections and paragraphs whenever

possible. All comments become the property of Hitachi Data Systems.

Thank you!

Physical capacity unit Value

1 KB 1,000 (103) bytes

1 MB 1,000 KB or 1,0002bytes

1 GB 1,000 MB or 1,0003bytes

1 TB 1,000 GB or 1,0004bytes

1 PB 1,000 TB or 1,0005bytes

1 EB 1,000 PB or 1,0006bytes

Logical capacity unit Value

1 block 512 bytes

1 KB 1,024 (210) bytes

1 MB 1,024 KB or 1,0242bytes

1 GB 1,024 MB or 1,0243bytes

1 TB 1,024 GB or 1,0244bytes

1 PB 1,024 TB or 1,0245bytes

1 EB 1,024 PB or 1,0246bytes

Overview of Hitachi Volume Shredder 1–1

Hitachi Virtual Storage Platform G1000 Hitachi Volume Shredder User Guide

Overview of Hitachi Volume Shredder

This chapter provides an overview of Volume Shredder operations on the

Hitachi Virtual Storage Platform G1000 storage system.

□Data security practices and Volume Shredder

□Supported volume types

□Volume Shredder operations

□Shredding times

Hitachi Virtual Storage Platform G1000 Hitachi Volume Shredder User Guide

1–2 Overview of Hitachi Volume Shredder

Data security practices and Volume Shredder

The Volume Shredder software enables you to securely erase data on

volumes in the Hitachi Virtual Storage Platform G1000 storage system by

overwriting existing data to prevent restoration of the erased data. For

example, when the user of a volume changes, you may want to purge the

data stored by the previous user before giving access to the new user. This

method of erasing data by overwriting it with dummy data is referred to as

shredding.

Because of the way data is written on the drives, overwriting data once or

twice might not be enough to ensure that the data cannot be restored. The

best practice is to overwrite data at least three times with dummy data.

Volume Shredder allows you to specify the number of times the data is

overwritten, enabling you to ensure compliance with applicable

requirements (for example, DoD5220.22-M).

Supported volume types

You can use Volume Shredder to shred both open-systems and mainframe

systems, including logical devices (LDEVs) and custom volumes (CVs) of all

emulation types. External volumes and Dynamic Provisioning virtual

volumes* can also be shredded.

*When a shredding operation is performed on an unused virtual volume for

Dynamic Provisioning, no dummy data is written to the volume.

You cannot use Volume Shredder to shred the following types of volumes:

• Pool volumes

• Virtual volumes for Thin Image

•Journalvolumes

• Volumes that are not write-enabled (access attribute is not read/write)

•TSE-VOL

Volume Shredder operations

The following figure shows user data that is being overwritten three times

(default value for number of overwrites). Volume Shredder overwrites data

using the following dummy data values:

• The first overwrite is 00.

• The second overwrite is FF.

• The third overwrite is 00.

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