HUAWEI Elastic Volume User Manual

Elastic Volume Service

User Guide

Issue 08

Date 2019-06-30

HUAWEI TECHNOLOGIES CO., LTD.

No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise c in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every ff has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.

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Contents

1 Disk Capacity Expansion........................................................................................................		1
1.1	Expansion Overview...............................................................................................................................................................	1
1.2	Expanding Capacity for an In-use EVS Disk...................................................................................................................	3
1.3	Expanding Capacity for an Available EVS Disk.............................................................................................................	6
1.4	Extending Disk Partitions and File Systems (Windows Server 2008)....................................................................	7
1.5	Extending Disk Partitions and File Systems (Linux).................................................................................................	33
1.5.1 Partition and File System Extension Preparations (Linux)..................................................................................		33
1.5.2 Extending Partitions and File Systems for System Disks (Linux)......................................................................		36
1.5.3 Extending Partitions and File Systems for Data Disks (Linux)..........................................................................		44


2	Detaching an EVS Disk.........................................................................................................		57
2.1		Detaching a System Disk...................................................................................................................................................	57
2.2		Detaching a Data Disk........................................................................................................................................................	58
3	Attaching an Existing Disk..................................................................................................		60
3.1		Attaching an Existing System Disk.................................................................................................................................	60
3.2		Attaching an Existing Non-Shared Disk........................................................................................................................	61
3.3		Attaching an Existing Shared Disk..................................................................................................................................	62
4	Deleting an EVS Disk............................................................................................................		64
5	Viewing Disk Details.............................................................................................................		66
6	Managing an Encrypted EVS Disk.....................................................................................		68
7	Managing a Shared EVS Disk.............................................................................................		70
8	Managing EVS Backup.........................................................................................................		72
9	Managing Snapshots (OBT)................................................................................................		75
9.1		Snapshot Overview (OBT).................................................................................................................................................	75
9.2		Creating a Snapshot (OBT)...............................................................................................................................................	76
9.3		Deleting a Snapshot (OBT)...............................................................................................................................................	77
9.4		Viewing Details of a Snapshot (OBT)............................................................................................................................	78
9.5		Rolling Back Data from a Snapshot (OBT)..................................................................................................................	79
9.6		Creating an EVS Disk from a Snapshot (OBT)............................................................................................................	79
10 Managing EVS Disk Transfer............................................................................................			81

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11	Managing a Tag...................................................................................................................		84
11.1		Tag Overview.......................................................................................................................................................................	84
11.2		Adding a Tag........................................................................................................................................................................	84
11.3		Modifying a Tag..................................................................................................................................................................	85
11.4		Deleting a Tag.....................................................................................................................................................................	86
11.5		Searching Disks by Tags...................................................................................................................................................	86
12	Changing Disk Name..........................................................................................................		88
13	Viewing EVS Monitoring Data.........................................................................................		90
14	Querying EVS Traces...........................................................................................................		94
15	Managing Quotas...............................................................................................................		95
15.1		Querying EVS Resource Quotas.....................................................................................................................................	95
15.2		Increasing EVS Resource Quotas...................................................................................................................................	96
A Appendix.................................................................................................................................			97
A.1 EVS Disk Status.....................................................................................................................................................................			97
A.2 EVS Snapshot Status............................................................................................................................................................			99
B Change History....................................................................................................................			101

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User Guide	1 Disk Capacity Expansion

1Disk Capacity Expansion

1.1 Expansion Overview

What Is Capacity Expansion?

If the capacity of an existing disk is n ffic n you can expand the disk capacity to increase the storage space.

Both system disks and data disks can be expanded. A system disk can be expanded to up to 1 TB, and a data disk to 32 TB. Currently, disk capacities can be expanded only. Capacity reduction is not supported.

How to Expand the Disk Capacity?

A capacity expansion operation includes the following steps:

1.Expand the disk capacity on the management console.

2. Log in to the server and extend the disk partition and

system.

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Figure 1-1 Capacity expansion procedure

Expand the Disk Capacity on the Management Console

Choose a proper expansion method based on the disk status. For how to view the disk status, see 5 Viewing Disk Details.

●For an In-use disk:

The disk has been attached to a server. Check whether the disk can be expanded in the In-use state by referring to Constraints.

–If yes, expand the disk capacity according to 1.2 Expanding Capacity for an In-use EVS Disk.

–If no, detach the disk. Then, expand the disk capacity according to 1.3 Expanding Capacity for an Available EVS Disk.

●For an Available disk:

The disk has not been attached to any server and can be directly expanded by referring to 1.3 Expanding Capacity for an Available EVS Disk.

A shared disk can be expanded only when its status is Available.

After the disk has been expanded on the management console, only the disk storage capacity is enlarged, but its additional space cannot be used directly. You

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	must log in to the server and extend the disk partition and		system. For details,
	see Table 1-1.
	Table 1-1 Extending the disk partition and	system

	Capacity After Expansion	Extend Disk Partition and File
		System
	Disk capacity ≤2 TB	● Windows: 1.4 Extending Disk
		Partitions and File Systems
		(Windows Server 2008)
		● Linux: 1.5.1 Partition and File
		System Extension Preparations
		(Linux)

	Disk capacity >2 TB	● GPT partition style: 1.4 Extending
		Disk Partitions and File Systems
		(Windows Server 2008) or 1.5.1
		Partition and File System
		Extension Preparations (Linux)
		● MBR partition style: Not supported
		The maximum disk capacity that
		MBR supports is 2 TB, and the disk
		space exceeding 2 TB cannot be
		used. If your disk uses MBR and you
		need to expand the disk capacity to
		over 2 TB, change the partition
		style from MBR to GPT. Ensure that
		the disk data has been backed up
		before changing the partition style
		because services will be interrupted
		and data on the disk will be cleared
		during this change.

NOTE

If the server is stopped during the expansion, the additional space of a Windows system disk, Windows data disk, and Linux system disk may be automatically added to the end partition after the server is started. In this case, the additional space can be directly used. If

the additional space is not automatically added, extend the partition and	system
according to the preceding steps.

Related Operations

For more expansion FAQs, see Disk Capacity Expansion FAQs.

1.2 Expanding Capacity for an In-use EVS Disk

Scenarios

This topic describes how to expand the capacity of an In-use EVS disk on the management console. The In-use status indicates that the disk has been attached

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to a server. You do not need to detach the disk when expanding an In-use disk. For how to view the disk status, see 5 Viewing Disk Details.

Constraints

●Currently, disk capacities can only be expanded, but cannot be reduced.

●When expanding an In-use disk, the server containing this disk must be in the

Running or Stopped state.

●A shared disk cannot be expanded in the In-use state. To expand a shared Inuse disk, you must detach it from all its servers, wait until its status changes to Available, and then expand its capacity. For more information, see 1.3 Expanding Capacity for an Available EVS Disk.

●Only some server OSs support capacity expansion of In-use disks. If the server OS does not support capacity expansion of In-use disks, detach the disk and then expand its capacity. Otherwise, you may need to stop and then start the server after the expansion to make the expansion takes ff c

Perform the following operations to check whether your server OS support capacity expansion of In-use disks:

a.Both public images and private images listed on the console support the capacity expansion of In-use disks.

Log in to the management console and choose Image Management Service. On the Public Images tab, view the images of the ECS image type.

b.If your server OS does not appear in the image list, check whether it is included in Table 1-2.

If your server OS appears in Table 1-2, the OS supports capacity expansion of In-use disks. Otherwise, you must detach the disk and then expand its capacity. For details, see 1.3 Expanding Capacity for an Available EVS Disk.

Table 1-2 OSs that support the capacity expansion of In-use disks

OS	Version

CentOS 7	7.2	64 bit or later

CentOS 6	6.5	64 bit or later

Debian	8.5.0 64 bit or later

Fedora	24 64 bit or later

SUSE 12	SUSE Linux Enterprise Server 12 64bit
	or later

SUSE 11	SUSE Linux Enterprise Server 11 SP4
	64bit

OpenSUSE	42.1 64bit or later

Oracle Linux Server release 7	7.2	64bit or later

Oracle Linux Server release 6	6.7	64bit or later

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	OS	Version

	Ubuntu Server 16	16.04 64bit

	Ubuntu Server 14	14.04 64-bit and 14.04.4 64-bit

	Windows Server 2016	Windows Server 2016 R2 Enterprise
		64bit

	Windows Server 2012	Windows Server 2012 R2 Standard
		64bit

	Windows Server 2008	Windows Server 2008 R2 Enterprise
		64bit

	Red Hat Enterprise Linux 7	7.3 64bit

	Red Hat Enterprise Linux 6	6.8 64bit

Prerequisites

You have backed up the disk data by creating a backup or snapshot. For more information about disk backups, see 8 Managing EVS Backup. For more information about snapshots, see 9.2 Creating a Snapshot (OBT).

Procedure

Step 1 Log in to the management console.

Step 2 Under Storage, click Elastic Volume Service. The disk list page is displayed.

Step 3 Determine whether to view the server information before expanding the disk.

●If you need to view the server information, perform the following procedure:

a.In the disk list, click the name of the to-be-expanded disk. The disk details page is displayed.

b.Click the Servers tab to view the server where the target disk has been attached.

c.Click Expand Capacity in the upper right corner of the page. The expansion page is displayed.

●If you do not need to view the server information, perform the following procedure:

a.In the disk list, locate the row that contains the target disk and click

Expand Capacity in the Operation column. The expansion page is displayed.

Step 4 Set the Add Capacity (GB) parameter and click Next.

Step 5 On the Details page, check the disk information again.

● If you do not need to modify the	c c	n click Submit to start the
expansion.

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	● If you need to modify the			c c	n click Previous to modify parameters.
	After the	c c	n are submitted, go back to the disk list page.
Step 6	In the displayed dialog box, click OK.
Step 7	In the disk list, view the capacity of the target disk.
	When the disk status changes from Expanding to In-use and the disk capacity
	increases, the expansion has succeeded.
	NOTE
	When the disk status is Expanding, you cannot change the c c n of the ECS where
	the disk attached.
Step 8	After a disk has been expanded on the management console, only the disk storage
	capacity is enlarged, but its additional space cannot be used directly. You must log
	in to the server and extend the disk partition and					system.

The operation method varies depending on the server OS.

●In Windows, see 1.4 Extending Disk Partitions and File Systems (Windows Server 2008).

●In Linux, see 1.5.1 Partition and File System Extension Preparations (Linux).

----End

1.3 Expanding Capacity for an Available EVS Disk

Scenarios

This topic describes how to expand the capacity of an Available EVS disk on the management console. The Available status indicates that the disk has not been attached to any server. For how to view the disk status, see 5 Viewing Disk Details.

Constraints

●Currently, disk capacities can only be expanded, but cannot be reduced.

Prerequisites

Procedure

Step 1 Log in to the management console.

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Step 2 Under Storage, click Elastic Volume Service. The disk list page is displayed.

Step 3 In the disk list, locate the row that contains the target disk and click Expand Capacity in the Operation column.

The expansion page is displayed.

Step 4 Set the Add Capacity (GB) parameter and click Next.

Step 5 On the Details page, check the disk information again.


●	If you do not need to modify the				c c	n click Submit to start the
	expansion.
●	If you need to modify the			c c	n click Previous to modify parameters.
After the		c c	n are submitted, go back to the disk list page.

Step 6 In the disk list, view the capacity of the target disk.

When the disk status changes from Expanding to Available and the disk capacity increases, the expansion has succeeded.

Step 7 Attach the disk to the server. For details, see the following topics:

●3.1 Attaching an Existing System Disk

●3.2 Attaching an Existing Non-Shared Disk

●3.3 Attaching an Existing Shared Disk

Step 8 After a disk has been expanded on the management console, only the disk storage capacity is enlarged, but its additional space cannot be used directly. You must log in to the server and extend the disk partition and system.

The operation method varies depending on the server OS.

●In Windows, see 1.4 Extending Disk Partitions and File Systems (Windows Server 2008).

●In Linux, see 1.5.1 Partition and File System Extension Preparations (Linux).

----End

1.4 Extending Disk Partitions and File Systems

(Windows Server 2008)

Scenarios

After a disk has been expanded on the management console, the disk size is enlarged, but the additional space cannot be used directly.

In Windows, you must allocate the additional space to an existing partition or a new partition.

If the disk capacity is expanded on a stopped server, the additional space of a Windows system disk or Windows data disk will be automatically added to the

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partition at the end of the disk upon the server startup. In this case, the additional space can be used directly.

This topic uses Windows Server 2008 R2 Enterprise 64bit as the sample OS to describe the expansion methods:

●For a system disk:

–If volume (C:) already exists, you can add the additional space to volume (C:) and use it as a system volume. For details, see System Disk: Add Additional Space to Volume (C:).

–If volume (C:) already exists, you can create a new volume such as volume (F:) with the additional space and use the new volume as a data volume. For details, see System Disk: Create New Volume (F:) with Additional Space.

–If the additional space has been added to volume (C:), you can shrink volume (C:), create a new volume with the available space, and use the new volume as a data volume. Only the available space can be shrunk and used to create the new volume. The additional space cannot be shrunk if it has already been used. This topic uses a system disk to describe how to perform extension operations for a Windows disk. These operations are also suitable for data disks. For details, see System Disk:

Add Additional Space to Volume (C:) and Allocate Available Space to New Volume (D:) via the Shrink Function.

●For a data disk:

–If volume (D:) already exists, you can add the additional space to volume (D:) and use it as a data volume. For details, see Data Disk: Add Additional Space to Volume (D:).

–If volume (D:) already exists, you can create a new volume such as volume (E:) with the additional space and use the new volume as a data volume. For details, see Data Disk: Create New Volume (E:) with Additional Space.

The method for allocating the additional space varies with the server OS. This topic is used for reference only. For detailed operations and ff nc see the corresponding OS documents.

NOTICE

Performing the expansion operations with caution. Misoperation may lead to data loss or exceptions. Therefore, you are advised to back up the disk data using backups or snapshots before expansion. For details about backups, see 8 Managing EVS Backup. For details about snapshots, see 9.2 Creating a Snapshot (OBT).

Prerequisites

●You have expanded the disk capacity and attached the disk to a server on the management console. For details, see 1.2 Expanding Capacity for an In-use EVS Disk or 1.3 Expanding Capacity for an Available EVS Disk.

●You have logged in to the server.

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	–	For how to log in to an ECS, see Logging In to an ECS.
	–	For how to log in to a BMS, see Logging In to the BMS.

System Disk: Add Additional Space to Volume (C:)

In this example, the system disk has 50 GB originally, and 22 GB is added on the management console. The following procedure describes how to add this 22 GB to volume (C:) on the server. After the operation is complete, volume (C:) will have 72 GB of capacity and can be used as a system volume.

Step 1 On the desktop of the server, right-click Computer and choose Manage from the shortcut menu.

The Server Manager window is displayed.

Step 2 In the navigation tree, choose Storage > Disk Management. The Disk Management window is displayed.

Figure 1-2 Disk Management (system disk)

NOTE

If you cannot view the additional space, right-click Disk Management and choose Refresh from the shortcut menu.

Step 3 On the Disk Management page, select the disk and volume that you want to extend. The current volume size and unallocated space are displayed.

Step 4 Right-click the target volume and choose Extend Volume.

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Figure 1-3 Choosing Extend Volume

Step 5 On the displayed Extend Volume Wizard window, click Next.

Figure 1-4 Extend Volume Wizard

Step 6 In the text box to the right of Select the amount of space in MB, enter the amount of the additional space and click Next.

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Figure 1-5 Selecting space

Step 7 Click Finish.

After the expansion succeeded, the partition size is larger than the original size.

Figure 1-6 Capacity expansion succeeded

----End

System Disk: Create New Volume (F:) with Additional Space

In this example, the system disk has 40 GB originally, and 60 GB is added on the management console. The following procedure describes how to use this 60 GB to create a new volume, for example volume (F:), on the server. After the operation is complete, new volume (F:) has 60 GB of capacity and can be used as a data volume.

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Step 1 On the desktop of the server, right-click Computer and choose Manage from the shortcut menu.

The Server Manager window is displayed.

Step 2 In the navigation tree, choose Storage > Disk Management. The Disk Management window is displayed.

Figure 1-7 Refresh (system disk)

Step 3 If you cannot view the additional space, right-click Disk Management and choose Refresh from the shortcut menu.

After the refresh, the additional space is displayed in the right area and is unallocated.

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Figure 1-8 Unallocated disk space (system disk)

Step 4 In the Unallocated area of Disk 0, right-click the blank area and choose New Simple Volume.

Figure 1-9 New Simple Volume (system disk)

Step 5 On the displayed New Simple Volume Wizard window, click Next.

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Figure 1-10 New Simple Volume Wizard (system disk)

Step 6 On the displayed Specify Volume Size page, set Simple volume size in MB and click Next. In this example, the default size is used.

Figure 1-11 Specify Volume Size (system disk)

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Step 7 On the displayed Assign Drive Letter and Path page, click Assign the following drive letter, select a drive letter, and click Next. In this example, drive letter F is selected.

Figure 1-12 Assign Driver Letter or Path (system disk)

Step 8 On the displayed Format Partition page, click Format this volume with the following settings, set parameters based on the requirements, and select

Perform a quick format. Then, click Next.

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Figure 1-13 Format Partition (system disk)

Step 9 Click Finish.

After the expansion succeeded, new volume (F:) is displayed.

Figure 1-14 Completing the New Simple Volume Wizard (new volume F:)

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Figure 1-15 New Volume (F:)

----End

System Disk: Add Additional Space to Volume (C:) and Allocate Available Space to New Volume (D:) via the Shrink Function

In this example, the system disk has 40 GB originally, and 60 GB is added on the management console and then formatted and added to volume (C:). This 60 GB has not been used.

The following procedure describes how to use the shrink function to create new volume (D:) with this 60 GB. After the operation is complete, new volume (D:) can be used as a data volume.

Step 1 On the desktop of the server, right-click Computer and choose Manage from the shortcut menu.

The Server Manager window is displayed.

Step 2 In the navigation tree, choose Storage > Disk Management. The Disk Management window is displayed.

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Figure 1-16 Refresh (shrink volume)

Step 3 In the (C:) area of Disk 0, right-click the blank area and choose Shrink Volume.

Figure 1-17 Shrink Volume

Step 4 The system automatically queries the available shrink space. In the displayed dialog box, enter the available space and click Shrink.

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In this example, the volume available space is 60 GB. Therefore, enter 61440 (60 × 1024 MB).

Figure 1-18 Shrink (shrink volume)

After the operation is complete, Disk 0 has 60 GB unallocated space.

Figure 1-19 Unallocated (shrink volume)

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Step 5 In the Unallocated area of Disk 0, right-click the blank area and choose New Simple Volume.

Figure 1-20 New Simple Volume (shrink volume)

Step 6 On the displayed New Simple Volume Wizard window, click Next.

Figure 1-21 New Simple Volume Wizard (shrink volume)

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Step 7 On the displayed Specify Volume Size page, set Simple volume size in MB and click Next. In this example, the default size is used.

Figure 1-22 Specify Volume Size (shrink volume)

Step 8 On the displayed Assign Drive Letter and Path page, click Assign the following drive letter, select a drive letter, and click Next. In this example, drive letter D is selected.

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Figure 1-23 Assign Driver Letter or Path (shrink volume)

Step 9 On the displayed Format Partition page, click Format this volume with the following settings, set parameters based on the requirements, and select

Perform a quick format. Then, click Next.

Figure 1-24 Format Partition (shrink volume)

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Step 10 Click Finish.

After the expansion succeeded, new volume (D:) is displayed.

Figure 1-25 Completing the New Simple Volume Wizard (new volume D:)

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Figure 1-26 New Volume (D:)

----End

Data Disk: Add Additional Space to Volume (D:)

In this example, the data disk has 100 GB originally, and 50 GB is added on the management console. The following procedure describes how to add this 50 GB to volume (D:) on the server. After the operation is complete, volume (D:) has 150 GB of capacity and can be used as a data volume.

Step 1 On the desktop of the server, right-click Computer and choose Manage from the shortcut menu.

The Server Manager window is displayed.

Step 2 In the navigation tree, choose Storage > Disk Management. The Disk Management window is displayed.

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Figure 1-27 Disk Management (data disk)

NOTE

If you cannot view the additional space, right-click Disk Management and choose Refresh from the shortcut menu.

Step 3 On the Disk Management page, select the disk and volume that you want to extend. The current volume size and unallocated space are displayed.

Step 4 Right-click the target volume and choose Extend Volume.

Figure 1-28 Choosing Extend Volume (Windows Server 2008)

Step 5 On the displayed Extend Volume Wizard window, click Next.

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Figure 1-29 Extend Volume Wizard (Windows Server 2008)

Step 6 In the text box to the right of Select the amount of space in MB, enter the amount of the additional space and click Next.

Figure 1-30 Selecting space (Windows Server 2008)

Step 7 Click Finish.

After the expansion succeeded, the partition size is larger than the original size.

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HUAWEI Elastic Volume User Manual

Contents

1 Disk Capacity Expansion

1.1 Expansion Overview

1.2 Expanding Capacity for an In-use EVS Disk

1.3 Expanding Capacity for an Available EVS Disk

●In Windows, see 1.4 Extending Disk Partitions and File Systems (Windows Server 2008).