Infortrend EonStor DS S48 Series, Руководство по оборудованию

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EonStor DS S48 Series Hardware Manual
5.7 Replacing the Enclosure
Infortrend enclosures are ruggedly constructed and under extremely rare instances
do they incur damages so severe (breakage causing circuit exposure, deformation,
etc.) that require replacing the enclosure. However impossible it may be, the likely
hood of an enclosure needing to be replaced is usually due to a faulty integrated
backplane that separates the front and rear sections of the chassis as mentioned
previously in section Internal Backplane . The internal backplane contains a circuit
board that provides logic level signals and low voltage power paths. Thermal sensors
and I 2 C devices are embedded to detect system temperatures and PSU/cooling
module operating status. And as this board contains no user-serviceable
components, when damaged, you will have to replace the entire enclosure
A faulty backplane board may cause the following:

Falsely report module statuses

Unable to power on some modules or not able to power on the system at all

System instability

Poor system performance

Affect storage data integrity
5.7.1 Differential Diagnosis to Determine Backplane Failure
Apart from obvious damage (circuit exposure, extreme enclosure deformation, etc.),
an indication of enclosure backplane failure can be determined by differential
diagnosis. The simple differential diagnosis will also assist in Infortrend Technical
Support staffs to promptly identify the issue!
Differential diagnosis can be done by swapping two modules to test the backplane’s
integrity. For example, if the status LED of the PSU 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 Power Off Procedure ) pull out the brand new replacement power supply,
insert it into the other PSU 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 by swapping them into the
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