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212 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.
Prerequisites
The following tasks must be completed before proceeding. For more
information about step 1and step 2, see the MD3600f and MD3620f storage
arrays Deployment Guide. For more information about step 3, see "Creating
Virtual Disks" on page 102.
1
Install the host software from MD3600f 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
run the MDSM to create and map virtual disks.
Using the MDSM software:
1
Map the host server to the MD3600f 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 212 Wednesday, June 8, 2011 5:01 PM