Multipath en limux

Red Hat Enterprise Linux 5 DM Multipath
DM Multipath Configuration and Administration

DM Multipath

Red Hat Enterprise Linux 5 DM Multipath DM Multipath Configuration and Administration Edition 3

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This book provides information on usingthe Device-Mapper Multipath feature of Red Hat Enterprise Linux 5

Preface v 1. Audience ........................................................................................................................ v 2. Related Documentation ................................................................................................... v 3. Feedback........................................................................................................................ v 4. Document Conventions ................................................................................................... vi 4.1. Typographic Conventions ..................................................................................... vi 4.2. Pull-quote Conventions........................................................................................ vii 4.3. Notes and Warnings ........................................................................................... viii 1. Device Mapper Multipathing 1.1. Overview of DM-Multipath ............................................................................................. 1.2. Storage Array Support.................................................................................................. 1.3. DM-Multipath Components ............................................................................................ 1.4. DM-Multipath Setup Overview ....................................................................................... 2. Multipath Devices 2.1. Multipath Device Identifiers........................................................................................... 2.2. Consistent Multipath Device Names in a Cluster ............................................................ 2.3. Multipath Device Attributes ........................................................................................... 2.4. Multipath Devices in Logical Volumes ............................................................................ 1 1 3 3 45 5 5 6 6

3. Setting Up DM-Multipath 7 3.1. Setting Up DM-Multipath ............................................................................................... 7 3.2. Ignoring Local Disks when Generating Multipath Devices ................................................ 8 3.3. Adding Devices to the Multipathing Database ............................................................. 10 4....