HP Hitachi Dynamic Link Manager Software - Manual (Page 4)

Automatic Failbacks...............................................................................2-20
Manual Path Switching....................................................................................2-21
Path Status Transition.....................................................................................2-22
The Online Path Status..........................................................................2-22
The Offline Path Status..........................................................................2-23
Status Transitions of a Path....................................................................2-23
Monitoring Intermittent Errors (Functionality When Automatic Failback Is Used)........2-26
Checking Intermittent Errors............................................................................2-26
Setting Up Intermittent Error Monitoring...........................................................2-26
Intermittent Error Monitoring Actions...............................................................2-27
When an Intermittent Error Occurs.........................................................2-27
When an Intermittent Error Does Not Occur............................................2-28
When the Conditions for an Intermittent Error Are Changed During Error
Monitoring............................................................................................2-28
When a User Changes the Intermittent Error Information..................................2-29
Detecting Errors by Using Path Health Checking......................................................2-31
Distributing a Load by Using the Dynamic I/O Path Control Function.........................2-31
What is the Dynamic Load Balance Control Function..........................................2-32
Dynamic I/O Path Control Function..................................................................2-32
Error Management................................................................................................2-32
Types of Collected Logs...................................................................................2-33
Filtering of Error Information...........................................................................2-35
Collecting Error Information Using the Utility for Collecting HDLM Error Information
(DLMgetras)...................................................................................................2-36
Utility for Collecting HDLM Installation Error Information (installgetras)..............2-36
Collecting Audit Log Data.......................................................................................2-36
Categories and Audit Events that HDLM Can Output to the Audit Log.................2-38
Requirements for Outputting Audit Log Data.....................................................2-43
Destination and Filtering of Audit Log Data.......................................................2-43
Audit Log Data Formats...................................................................................2-44
Integrated HDLM management using Global Link Manager.......................................2-46
Cluster Support.....................................................................................................2-47
3 Creating an HDLM Environment.............................................................3-1
HDLM System Requirements....................................................................................3-3
Hosts and OSs Supported by HDLM...................................................................3-3
Storage Systems Supported by HDLM...............................................................3-17
Storage Systems...................................................................................3-17
HBA (If an FC-SAN Is Used)...................................................................3-18
NIC (If an IP-SAN Is Used).....................................................................3-18
When Handling Intermediate Volumes Managed by Hitachi RapidXchange.3-18
Related Products When Using Red Hat Enterprise Linux AS4/ES4.......................3-19
Cluster Software Supported by HDLM.....................................................3-19
Volume Managers Supported by HDLM....................................................3-36
File Systems Supported by HDLM...........................................................3-38
Boot Disk Environments and Hitachi Compute Blade Environments Supported
by HDLM...............................................................................................3-38
Related Products When Using Red Hat Enterprise Linux 5..................................3-42
Cluster Software Supported by HDLM (If an FC-SAN Is Used)...................3-42
Volume Managers Supported by HDLM....................................................3-54
File Systems Supported by HDLM...........................................................3-56
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Hitachi Dynamic Link Manager User Guide for Linux ®