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Chapter 2
Multipath Driver System Setup
The following sections describe the steps that must be taken to properly reference the Multipath Driver
software for the hardware and software environment.
Refer to the software information (readme.pdf) provided on the CD for the installation method of the
Multipath Driver, uninstallation method, and the latest notes.
2.1
Accessing the Storage System Disks
Refer to
"2.1.1 Using the udev Function" (page 34)
storage system disks.
When using FUJITSU Software PRIMECLUSTER Global Disk Services with a Red Hat Enterprise Linux AS v.4
environment, a Red Hat Enterprise Linux ES v.4 environment, or a Red Hat Enterprise Linux environment,
refer to
"2.1.2 When Using FUJITSU Software PRIMECLUSTER Global Disk Services (Storage System Recognition
Order Setting)" (page
2.1.1
Using the udev Function
When using the following OSs, the storage system disks should be referred to using their udev function by-id
names.
•
Red Hat Enterprise Linux AS v.4 (Update 4 or later)
•
Red Hat Enterprise Linux ES v.4 (Update 4 or later)
•
Red Hat Enterprise Linux 5
•
Red Hat Enterprise Linux 6
•
Red Hat Enterprise Linux 7
•
SUSE Linux Enterprise Server 10 (Service Pack 1 or later)
•
SUSE Linux Enterprise Server 11 (Service Pack 1 or later)
Since OSs other than the ones listed above do not support the udev function, upgrading to OSs that support
the udev function is recommended.
Using the by-id names has the following advantages:
•
The same device names can be always assigned to the storage system LUs.
The generally used device names (/dev/sda, etc.), may change whenever the server is started, if multiple
storage systems are connected to one server via Fibre Channel switch. Storage system failures and LU
addition may also cause the device names to change. This does not occur when the by-id names are used.
35).
FUJITSU Storage ETERNUS Multipath Driver V2 User's Guide for Linux
Copyright 2014 FUJITSU LIMITED
and make sure to use the "by-id name" for referring to
34
P2U3-0031-15ENZ0
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