Dell MD3200, MD3220 Using DM Multipathing Devices

168 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 IO operations,

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

partition node, not the multipathing device nodes.

The following tasks must be completed before proceeding. For more

information about steps 1 and 2, see the MD3200 and MD3220 storage arrays

Deployment Guide. For more information about step 3, see "Creating Virtual

Disks" on page 96.

Install the host software from MD3200 Series resource media—

Insert the

resource media to start the installation of Modular Disk Storage Manager

(MDSM).

NOTE: Red Hat install of 5.x needs a remount of the DVD media to make

contents executable.

Reboot when prompted by the install program—

The installation program

prompts for and needs a reboot at completion of install.

Create and map virtual disks using MDSM—

After configuring the arrays

using the Modular Disk Configuration Utility (MDCU), run the MDSM

to create and map virtual disks.

Using the MDSM software:

Map the host server to the MD3200 Series storage array

Create the Virtual Disks

Map newly created arrays to your host server

NOTE: Any array configured with MDCU automatically adds to the list of

Devices in the PowerVault Modular Disk Storage Manager Enterprise

Management Window (EMW).

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