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180 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.
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 at support.dell.com/manuals. For more information
about step 3, see "Creating Virtual Disks" on page 98.
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).
book.book Page 180 Tuesday, September 27, 2011 3:25 PM