EonStor DS S12/S16/S24 Series Hardware Manual
Differential diagnosis can be done by swapping two modules to test the backplane’s
integrity. For example, if the status LED of the PSU 0 lights up
RED
(indicating failure)
and normally you would order a new PSU to replace the failed one. If you have
replaced the failed PSU and find that the status LED still lights up
RED
then there is
a chance that the backplane may be faulty! To test it, shutdown the system (refer to
section
3.7.6 Power Off Procedure
) pull out the brand new replacement power supply,
insert it into the PSU 1 slot, power on the system and if the status LED lights up
GREEN
,
then the backplane board may be faulty and you will need to replace the
enclosure to rectify this problem. The same differential diagnosis method can be
applied using controllers / hard drives / cooling modules (2U/ 3U/ 4U systems) by
swapping them into the other slot.
5.7.2
Enclosure Replacement Must Knows
1. Always use the differential diagnosis method mentioned above to test the
integrity of the backplane board
2. Record your differential diagnosis findings and consult with Infortrend Technical
Support.
3. If the system is still operable, you can choose to leave it running but remember to
fill up all module slots after swapping them around (empty module slots will
interrupt airflow)
4. As a faulty backplane board may affect the system in a variety of ways
(performance, stability, data integrity, etc.), once you have consulted Infortrend
Technical Support staffs and confirmed it is indeed a new enclosure you need,
you should arrange for a replacement immediately!
5.
Replacing an enclosure will incur significant amount of system downtime
so do confirm module integrity and consult Infortrend Technical Support before
going ahead with the enclosure replacement procedure!
5.7.3
Enclosure Replacement Procedure
The following steps describe the enclosure replacement procedure:
Step 1
. In extreme rare instances, if there are obvious damages to the enclosure
exposing circuits inside, go to Step 3. When you suspect the backplane
board is faulty, perform the simple differential diagnosis test mentioned
above.
Step 2
. Record your differential diagnosis findings, share and consult with Infortrend
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