Dell PowerVault Storage MD1280 Dell Storage MD1280 Service Guide - Page 14

Electrostatic discharge precautions, Pre-replacement tasks, Turning off the EMMs and enclosure

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CAUTION: If the enclosure system operates for too long (depending on altitude) with drive drawers open, the enclosure can overheat, causing power failure and data loss. Such use may invalidate the warranty. Electrostatic discharge precautions To avoid injury and damage to the enclosure, always follow electrostatic discharge (ESD) precautions. ESD is generated by two objects with different electrical charges coming into contact with each other. The resulting electrical discharge can damage electronic components and PCBs. • Dell recommends to always use an antistatic mat and antistatic wrist or ankle strap while working on components in the interior of an enclosure. • Observe all conventional ESD precautions when handling plug‐in modules and components. • Avoid contact with backplane components and module connectors. • When you are not using the components and PCBs, keep them in their antistatic bags. Pre-replacement tasks If the FRU is not hot‐swappable, the EMMs and enclosure must be turned off. Turning off the EMMs and enclosure About this task To turn off the EMMs and enclosure, complete the following tasks: Steps 1. Before turning off the EMMs and enclosure, identify the failed devices. 2. Stop I/O to the storage enclosure. 3. Turn off the EMMs and PSUs in the enclosure using the power switches located on the corresponding devices. 4. Disconnect power from the enclosure by removing the power cords from all the PSUs in the enclosure. Replacing PSUs The Dell Storage MD1280 enclosure supports two 2.8kW AC hot‐swappable PSUs. If one PSU stops functioning, the second PSU continues to supply power to the enclosure. Identifying the failed PSU To identify a non-functioning PSU, use the secli component of the Storage Enclosure Management Software or visually verify which PSU is not functioning. For more information on using the secli to identify failed devices, see the Dell Storage MD1280 Administrator's Guide. Replacing a PSU About this task To replace failed PSUs, complete the following tasks: 14

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CAUTION: If the enclosure system operates for too long (depending on altitude) with drive
drawers open, the enclosure can overheat, causing power failure and data loss. Such use may
invalidate the warranty.
Electrostatic discharge precautions
To avoid injury and damage to the enclosure, always follow electrostatic discharge (ESD) precautions.
ESD is generated by two objects with different electrical charges coming into contact with each other.
The resulting electrical discharge can damage electronic components and PCBs.
•
Dell recommends to always use an antistatic mat and antistatic wrist or ankle strap while working on
components in the interior of an enclosure.
•
Observe all conventional ESD precautions when handling plug
‐
in modules and components.
•
Avoid contact with backplane components and module connectors.
•
When you are not using the components and PCBs, keep them in their antistatic bags.
Pre-replacement tasks
If the FRU is not hot
‐
swappable, the EMMs and enclosure must be turned off.
Turning off the EMMs and enclosure
About this task
To turn off the EMMs and enclosure, complete the following tasks:
Steps
1.
Before turning off the EMMs and enclosure, identify the failed devices.
2.
Stop I/O to the storage enclosure.
3.
Turn off the EMMs and PSUs in the enclosure using the power switches located on the
corresponding devices.
4.
Disconnect power from the enclosure by removing the power cords from all the PSUs in the
enclosure.
Replacing PSUs
The Dell Storage MD1280 enclosure supports two 2.8kW AC hot
‐
swappable PSUs. If one PSU stops
functioning, the second PSU continues to supply power to the enclosure.
Identifying the failed PSU
To identify a non-functioning PSU, use the secli component of the Storage Enclosure Management
Software or visually verify which PSU is not functioning. For more information on using the secli to
identify failed devices, see the
Dell Storage MD1280 Administrator's Guide
.
Replacing a PSU
About this task
To replace failed PSUs, complete the following tasks:
14