Protecting cables
Damage to the cables can affect the performance of your storage system. Observe the
following guidelines to protect the cables:
■
Keep cables away from sharp edges or metal corners.
■
When bundling cables, do not pinch or constrict the cables.
■
Do not use zip ties to bundle cables. Instead, use Velcro hook-and-loop ties that do not
have hard edges and which you can remove without cutting.
■
Never bundle network cables with power cables. If network and power cables are not
bundled separately, electromagnetic interference (EMI) can affect your data stream.
■
If you run cables from overhead supports or from below a raised floor, include vertical
distances when calculating necessary cable lengths.
■
If you use overhead cable supports:
●
Verify that your supports are anchored adequately to withstand the weight of bundled
cables.
●
Gravity can stretch and damage cables over time. Therefore, do not allow cables to
sag through gaps in your supports.
●
Place drop points in your supports that permit cables to reach racks without bending or
pulling.
■
Unintentional unplugging or unseating of a power cable can have a serious impact on the
operation of an enterprise storage system. Unlike data cables, power connectors do not
have built-in retention mechanisms to prevent this from happening.
To prevent accidental unplugging or unseating of power cables, the storage system
includes a rubber cable-retention strap near the AC receptacle on each controller. These
straps, shown in the following image, loop around the neck of a power cable connector,
and the notched tail is slipped over the hook of the restraining bar fixed to the storage
system.
Cabling full-width modules
When cabling full-width modules, such as NAS modules as shown in the following figure,
route the cables horizontally, so that they do not interfere when replacing a module.
Managing cables
Appendix F: Data and power cables
VSP N800 Hardware Reference Guide 91
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