User`s guide

Solving Initial Startup Problems
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• There is a storage system fault. See “ESI/Ops Panel LEDs and Switches” on
page 79.
• There are mixed single-port and dual-ports modules within an enclosure. Only one
type of module may be installed in an enclosure.
If the SGI server does not recognize the storage system, check the following:
• Ensure that the device driver for the host bus adapter board has been installed. If
the HBA was installed at the factory, this software is in place; if not, check the HBA
and the server documentation for information on the device driver.
• Ensure the FC-AL interface cables from the LRC I/O module to the Fibre Channel
board in the host computer are installed correctly.
• Check the selector switches on the ops panels of the storage system as follows:
– On a tower or a RAID enclosure the ops panel should be set to address 1.
– On the first expansion enclosure attached to a RAID system, the ops panel
should be set to address 2.
– On the first enclosure in a JBOD system, the ops panel should be set to address
1. Other enclosures that are daisy chained to the first enclosure should be
addressed sequentially (2-7).
• Ensure that the LEDs on all installed drive carrier modules are green. Note that the
drive LEDs flash during drive spinup.
• Check that all drive carrier modules are correctly installed.
• If an amber disk drive module LED drive fault is on, there is a drive fault. See
Table 5-7 on page 90.
If the SGI server connected to the storage system is reporting multiple Hard Error
(SCS_DATA_UNDERRUN) errors in the /var/adm/SYSLOG, the cabling connected to
the controller reporting the errors requires cleaning or replacement. For more
information on cleaning cables, refer to “Care and Cleaning of Optical Cables” on
page 94.