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Basic Storage Service Configuration Guide for Block

OceanStor Dorado V3 Series V300R002

This document is applicable to OceanStor Dorado3000 V3, Dorado5000 V3, Dorado6000 V3, and Dorado18000 V3. It describes the basic storage services and explains how to configure and manage them.
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Using the Storage Space on an Application Server

Using the Storage Space on an Application Server

After a connection is established between a storage system and an application server, the application server must discover the newly-added logical disk (that is, the storage space specified by a mapped LUN) to use it as a common disk for data reads and writes.

Prerequisites

  • The application server is communicating properly with the storage system.
  • The planned storage capacity has been allocated to the application server.
  • Multipathing software has been installed and configured for the application server when redundant paths exist between the application server and the storage system. This prevents multiple LUNs from being repetitively mapped to the application server.
    NOTE:
    • For details about how to install and configure UltraPath, Huawei-developed multipathing software, refer to the UltraPath user guide specific to your operating system. For details about how to configure OS native multipathing software, refer to Huawei SAN Storage Host Connectivity Guide for XXX.
    • If multipathing software is installed and configured after LUNs are mapped to the application server, you must restart the application server for the multipathing policies to take effect.

Precautions

  • Do not allocate disks in use to other applications. Otherwise, data security will be compromised.
  • If a host login error occurs, operations on disks affect the running of applications.
  • If compatibility issues occur, use of the storage space on application servers may be compromised.

Context

The maximum LUN capacity that can be identified by an application server varies according to the operating system and file system used by the application server. Table 4-23 lists the maximum LUN capacity supported by various operating systems.

Table 4-23 Maximum LUN capacity supported by various operating systems

Operating System

File System

Maximum Allowed LUN Capacity

Windows Server 2003

New Technology File System (NTFS)

2 TB

NOTE:

If a LUN mapped to a Windows Server 2003-based application server is larger than 2 TB, convert it into a GUID Partition Table (GPT) disk.

Windows Server 2003 SP1 and later

NTFS

256 TB

Windows XP 32-bit

NTFS

2 TB

Windows XP 64-bit

NTFS

256 TB

Windows Server 2008

NTFS

256 TB

Windows 7

NTFS

256 TB

SUSE Linux Enterprise Server

EXT3/ReiserFS/XFS

16 TB/16 TB/8 EB

Red Hat Enterprise Linux 5

EXT3/XFS

16 TB/100 TB

Red Hat Enterprise Linux 6

EXT3/EXT4/XFS

16 TB/16 TB/100 TB

NOTE:

Plan the capacity of a LUN before mapping it to an application server. If the LUN capacity exceeds the specifications, the application server will fail to identify the LUN.

Configuration Method

For details, see the Huawei SAN Storage Host Connectivity Guide for XXX. XXX represents a specific operating system, for example, Windows.

NOTE:

You can log in to Huawei's technical support website (https://support.huawei.com/enterprise/) and enter the product model + document name in the search box to search for, browse, and download documents.

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Updated: 2019-07-17

Document ID: EDOC1100049139

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