Using dm multipathing devices, Prerequisites – Dell POWERVAULT MD3620I User Manual

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Configuration: Device Mapper Multipath for Linux

Using DM Multipathing Devices

NOTE:

Using or modifying any nodes other than the multipathing device nodes can

result in array or file system problems, including loss of communication with the

array and corruption of the file system. Avoid accessing any device other than the

multipathing device.

NOTE:

After creating a partition on a multipathing device, all I/O operations,

including file system creation, raw I/O and file system I/O, must be done through the

partition node and not through the multipathing device nodes.

Prerequisites

The following tasks must be completed before proceeding. For more

information about steps 1–3, see the MD3600i and MD3620i Storage Arrays

Deployment Guide at dell.com/support/manuals. For more information about

1 Install the host software from the MD3600i Series resource media—

Insert the Resource media in the system to start the installation of

Modular Disk Storage Manager (MDSM) and Modular Disk

Configuration Utility (MDCU).

NOTE:

Red Hat install of 5.

x requires a remount of the DVD media to make

contents executable.

2 Reboot when prompted by the install program—The installation program

prompts for and needs a reboot at completion of the installation.

3 Configure using MDCU—After the host server has rebooted, the MDCU

automatically starts and is present on the desktop. This utility allows for

quick and easy configuration of new and or existing MD3600i Series

storage arrays present on your network. It also provides a GUI Wizard for

establishing the iSCSI sessions to the array.

4 Create and map virtual disks using MDSM—After configuring the arrays

using the MDCU, run the MDSM to create and map virtual disks.

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