Dell POWERVAULT MD3600F - Manual (Page 221)

Configuration: Device Mapper Multipath for Linux 221
Device Mapper Configuration Steps
To complete the DM multipathing configuration and make the storage
available to the Linux host server:
1 Scan for virtual disks. See "Scan for Newly Added Virtual Disks" on
page 221.
2 Display the multipath device topology. See "Display the Multipath Device
Topology Using the Multipath Command" on page 222.
3 Create a partition on a multipath device node. See "Create a New fdisk
Partition on a Multipath Device Node" on page 223.
4 Add a partition to DM. See "Add a New Partition to Device Mapper" on
page 223.
5 Create a file system on a DM partition. See "Create a File System on a
Device Mapper Partition" on page 224.
6 Mount a DM partition. See "Mount a Device Mapper Partition" on
page 224.
NOTE: In the following command descriptions is used to indicate where a
substitution must be made. On RHEL systems is the number assigned to the
device. On SLES systems is the letter(s) assigned to the device.
Scan for Newly Added Virtual Disks
The rescan_dm_devs command scans the host server system looking for
existing and newly added virtual disks mapped to the host server.
# rescan_dm_devs
If an array virtual disk (VD) is mapped to the host server at a later time, the
rescan_dm_devices
command must be run again to make the VD a
visible LUN to the operating system.
book.book Page 221 Tuesday, June 18, 2013 3:03 PM