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Figure 1.3. Act ive/Active Multipath Configuration with One RAID Device

1.2. Storage Array Support

By default, DM-Multipath includes support for the most common storage arrays that support DM-

Multipath. The supported devices can be found in the m ultipath.conf.defaults file. If your storage

array supports DM-Multipath and is not configured by default in this file, you may need to add them to the

DM-Multipath configuration file, m ultipath.conf. For information on the DM-Multipath configuration

file, see Chapter 4, The DM-Multipath Configuration File.

Some storage arrays require special handling of I/O errors and path switching. T hese require separate

hardware handler kernel modules.

1.3. DM-Multipath Components

Table 1.1, “DM-Multipath Components”. describes the components of DM-Multipath.

Red Hat Enterprise Linux 4 DM Multipath

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 40 41

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Red Hat LINUX VIRTUAL SERVER 4.7 - ADMINISTRATION Guida di Installazione Pagina 13