Dell Brocade 6520 Fabric OS Troubleshooting and Diagnostics Guide v7.1.0 - Page 18

Most common problem areas, Questions for common symptoms - driver

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1 Most common problem areas Most common problem areas Table 1 identifies the most common problem areas that arise within SANs and identifies tools to use to resolve them. TABLE 1 Common troubleshooting problems and tools Problem area Investigate Tools Fabric Storage Devices Hosts Storage Management Applications • Missing devices • Switch LEDs • Marginal links (unstable connections) • Switch commands (for example, • Incorrect zoning configurations switchShow or nsAllShow) for • Incorrect switch configurations diagnostics • Web or GUI-based monitoring and management software tools • Physical issues between switch and devices • Incorrect storage software configurations • Device LEDs • Storage diagnostic tools • Switch commands (for example, switchShow or nsAllShow) for diagnostics • Physical issues between switch and devices • Downgrade HBA firmware • Incorrect device driver installation • Incorrect device driver configuration • Device LEDs • Host operating system diagnostic tools • Device driver diagnostic tools • Switch commands (for example, switchShow or nsAllShow) for diagnostics Also, make sure you use the latest HBA firmware recommended by the switch supplier or on the HBA supplier's website • Incorrect installation and configuration of the storage devices that the software references. For example, if using a volume-management application, check for: • Application-specific tools and resources - Incorrect volume installation - Incorrect volume configuration Questions for common symptoms You first must determine what the problem is. Some symptoms are obvious, such as the switch rebooted without any user intervention, or more obscure, such as your storage is having intermittent connectivity to a particular host. Whatever the symptom is, you must gather information from the devices that are directly involved in the symptom. Table 2 lists common symptoms and possible areas to check. You may notice that an intermittent connectivity problem has lots of variables to look into, such as the type of connection between the two devices, how the connection is behaving, and the port type involved. 2 Fabric OS Troubleshooting and Diagnostics Guide 53-1002751-01

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2
Fabric OS Troubleshooting and Diagnostics Guide
53-1002751-01
Most common problem areas
1
Most common problem areas
Table 1
identifies the most common problem areas that arise within SANs and identifies tools to
use to resolve them.
Questions for common symptoms
You first must determine what the problem is. Some symptoms are obvious, such as the switch
rebooted without any user intervention, or more obscure, such as your storage is having
intermittent connectivity to a particular host. Whatever the symptom is, you must gather
information from the devices that are directly involved in the symptom.
Table 2
lists common symptoms and possible areas to check. You may notice that an intermittent
connectivity problem has lots of variables to look into, such as the type of connection between the
two devices, how the connection is behaving, and the port type involved.
TABLE 1
Common troubleshooting problems and tools
Problem area
Investigate
Tools
Fabric
•
Missing devices
•
Marginal links (unstable connections)
•
Incorrect zoning configurations
•
Incorrect switch configurations
•
Switch LEDs
•
Switch commands (for example,
switchShow or nsAllShow) for
diagnostics
•
Web or GUI-based monitoring and
management software tools
Storage Devices
•
Physical issues between switch and
devices
•
Incorrect storage software
configurations
•
Device LEDs
•
Storage diagnostic tools
•
Switch commands (for example,
switchShow or nsAllShow) for
diagnostics
Hosts
•
Physical issues between switch and
devices
•
Downgrade HBA firmware
•
Incorrect device driver installation
•
Incorrect device driver configuration
•
Device LEDs
•
Host operating system diagnostic
tools
•
Device driver diagnostic tools
•
Switch commands (for example,
switchShow or nsAllShow) for
diagnostics
Also, make sure you use the latest HBA
firmware recommended by the switch
supplier or on the HBA supplier's website
Storage Management
Applications
•
Incorrect installation and
configuration of the storage devices
that the software references.
For example, if using a
volume-management application,
check for:
-
Incorrect volume installation
-
Incorrect volume
configuration
•
Application-specific tools and
resources