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Table 5-2
Tool
multipath
multipathd
devmap-name
kpartx
For a list of files included in this package, see the
www.novell.com/products/linuxpackages/suselinux/multipath-tools.html).
Ensure that the multipath-tools package is installed by entering the following at a terminal console
prompt:
rpm -q multipath-tools
5.2.3 Using mdadm for Multipathed Devices
The default settings for mdadm.conf (and lvm.conf) do not work properly with multipathed
devices. By default, both md and LVM2 scan physical devices only and ignore any symbolic links or
device-mapper devices.
Scanning physical devices does not work for multipathed devices. Instead you must scan for
multipathed devices in the/dev/disk/by-id directory.
If a previous MD installation exists, modify mdadm.conf to handle the devices correctly by ID
instead of by device node path. For instructions, see
lvm.conf to Scan Devices by UUID," on page
To use software RAID with mdadm, the /etc/mdadm.conf must be set up correctly. See
Multipathed Devices" on page 53
5.3 Supported Storage Subsystems
Multipath I/O is available on all of the processor platforms that are supported by SUSE Linux
Enterprise Server. The following storage subsystems have been tested with SUSE Linux Enterprise
Server:
EMC*
Hitachi*
Hewlett-Packard*/Compaq*
IBM*
NetApp*
SGI*
Most other vendors' storage subsystems should also work. Consult your vendor's documentation for
guidance.
46
SLES 10 Storage Administration Guide
Tools in the multipath-tools Package
Description
Scans the system for multipathed devices and assembles them.
Waits for maps events, then executes multipath.
Provides a meaningful device name to udev for device maps (devmaps).
Maps linear devmaps to partitions on the multipathed device, which makes
it possible to create multipath monitoring for partitions on the device.
for more information.
multipath-tools Package Description (http://
Section 5.4.4, "Configuring mdadm.conf and
48.
"Using
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