Prerequisites, Device mapper configuration steps – Dell PowerVault MD3820f User Manual

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Prerequisites

The following tasks must be completed before proceeding. For more information about step 1 through
step 3, see the storage array’s Deployment Guide. For more information about step 4, see

Creating Virtual

Disks

.

1.

Install the host software from the MD Series storage arrays resource DVD — Insert the Resource

media in the system to start the installation of Modular Disk Storage Manager (MD Storage Manager)
and Modular Disk Configuration Utility (MDCU).

NOTE: Installation of Red Hat 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 MD

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 the MD Storage Manager — After configuring the arrays using the

MDCU, run the MD Storage Manager to create and map virtual disks.

Using The MD Storage Manager

Use the MD Storage Manager to:

• Map the host server to the MD Series storage array
• Create the virtual disks
• Map newly created arrays to your host server

NOTE: Any arrays configured with MDCU automatically get added to the list of devices in the EMW.

Device Mapper Configuration Steps

To complete the DM multipathing configuration and make storage available to the Linux host server:

1.

Scan for virtual disks.
See

Scan For Newly Added Virtual Disks

.

2. Display the multipath device topology.

See

Display The Multipath Device Topology Using The Multipath Command

.

3. Create a partition on a multipath device node.

See

Create A New fdisk Partition On A Multipath Device Node

.

4. Add a partition to DM.

See

Add A New Partition To Device Mapper

.

5. Create a file system on a DM partition.

See

Create A File System On A Device Mapper Partition

.

6. Mount a DM partition.

See

Mount A Device Mapper Partition

.

The following instructions show how to complete each of these steps.

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