Troubleshooting
Problem
The SAN devices in a FAStT storage device (1742-900) that is connected to a JS20 through the internal Optical Passthrough Module (OPM) are not visible in the hardware configuration when Red Hat LINUX Version 3 Update 2 or lower is being used.
Resolving The Problem
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Source
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RETAIN tip: H182518
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Symptom
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The SAN devices in a FAStT storage device (1742-900) that is connected to an IBM eServer BladeCenter JS20 through the internal Optical Passthrough Module (OPM) are not visible in the hardware configuration when Red Hat LINUX Version 3 Update 2 or lower is being used.
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Affected configurations
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The system may be any of the following IBM BladeCenter systems:
- an IBM BladeCenter JS20, type 8842, any model
The system is configured with any supported fibre channel storage device.
The following operating systems are affected:
- Red Hat Enterprise Linux, version 3
Note: This does not imply that the network operating system will work under all combinations of hardware and software. Please see the compatibility page for more information: http://www.ibm.com/servers/eserver/serverproven/compat/us/
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Solution
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This behavior is corrected in Red Hat Linux Version 3 Update 3 (or later).
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Workaround
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With Red Hat Linux Version 3 Update 2, a fibre channel switch module must be installed between the FAStT storage and the OPM that is connected to the JS20. There is no workaround for Update 2 without adding a fibre channel switch module.
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Additional information
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The device driver does not recognize the LUNs defined for the blade. If the fibre channel storage device is connected to the JS20 through a supported fibre channel switch module installed in the BladeCenter, then the switch will recognize and pass the LUN definitions to the JS20.
Document Location
Worldwide
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Document Information
Modified date:
29 January 2019
UID
ibm1MIGR-56769