Dell PowerVault MD3200 Owner's Manual - Page 168

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. Prerequisite Steps 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. 1 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. 2 Reboot when prompted by the install program-The installation program prompts for and needs a reboot at completion of install. 3 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: 1 Map the host server to the MD3200 Series storage array 2 Create the Virtual Disks 3 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). 168 Configuration: Device Mapper Multipath for Linux