IBM DCS9550 1S1, Инструкция по установке и обслуживанию

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Troubleshooting and Problem Solving
38 IBM System Storage DCS9550 1S1 Storage Expansion Unit Installation, Service, and User Guide
4.2.2 Alarm Sounds On Power Up
Please refer to Section 4.4 .
4.2.3 Green “Signal Good” LED on SCM Not Lit
Check that the cables have not been reversed during installation.
4.2.4 Computer Doesn’t Recognize the DCS9550 1S1 Storage Expansion Unit
1 Check that the FC-AL interface cables from the DCS9550 1S1 Storage Expansion Unit to the
host computer, or RAID controller, are fitted correctly.
2 Check the Enclosure ID switch settings on your DCS9550 1S1 Storage Expansion Unit and on
your system host.
3 Check that the LEDs on all installed drive carrier modules are illuminated Green. Note that the
drive LEDs will not be lit during drive spinup.
4 Check that all drive carrier modules have been correctly installed.
5 Check that there is a valid FC_AL signal present at the I/O connector (see section 2.4.1 .) If
there is no signal present check that the cable has not been reversed during installation.
6 Check the SCM I/O module setup as follows:
– Check that the SCM I/O module has been correctly installed and all external links and cables are
securely fitted.
– Check that the maximum cable length has not been exceeded.
4.3 LEDs
Green LEDs are always used for good or positive indication, flashing Green/Amber if non-
critical conditions exist. Amber LEDs indicate there is a critical fault present within the
module.
4.3.1 Power Supply/Cooling Module
The Power Supply Cooling LEDs are shown in Table 4–1 .
• Under Normal conditions the LEDs should all be illuminated constant GREEN
• If a problem is detected the color of the relevant LED will change to AMBER.