Dell MD3620I, MD3600I owner manual Using DM Multipathing Devices, Prerequisites, 186

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. For more information about step 4, see "Creating Virtual Disks" on page 110.

1Install 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.

2Reboot when prompted by the install program—The installation program prompts for and needs a reboot at completion of the installation.

3Configure 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.

4Create 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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Configuration: Device Mapper Multipath for Linux