IBM DS4000 EXP810, Инструкция по установке, использованию и обслуживанию

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v Power cabling: The storage expansion enclosure uses two standard power
cables. You can connect the power cables to a primary power unit inside the
rack, such as a properly grounded ac distribution unit or uninterruptible power
supply. You can also connect the power cable to an external source, such as a
properly grounded electrical outlet.
Note: To ensure maximum availability of power to your storage expansion
enclosure, do not connect both the left and right power supplies to the
same power circuit or power source.
Installing SFP modules
The storage expansion enclosure requires SFP modules. SFP modules convert
electrical signals to optical signals that are required for fibre channel transmission to
and from RAID controllers. After you install the SFP modules, you use fibre-optic
cables to connect the storage expansion enclosure to a DS4000 storage subsystem
or other storage expansion enclosures.
Before installing SFP modules and fibre-optic cables, read the following information:
v
Do not mix long-wave SFPs and short-wave SFPs on a single storage
subsystem. Use either long-wave SFPs or short-wave SFPs. You can use the DS
Storage Manager client to view the Storage Subsystem Profile in order to verify
that you are not mixing long-wave and short-wave SFPs.
Attention: In addition, do not use long-wave SFPs or GBICs in any of the FC
ports in the FC drive loops. (Long-wave SFPs and GBICs are not supported for
use in the drive ports of storage expansion enclosures.)
v The SFP module housing has an integral guide key that is designed to prevent
you from inserting the SFP module improperly.
v
Use minimal pressure when inserting an SFP module into an SFP port. Forcing
the SFP module into a port could cause damage to the SFP module or to the
port.
v You can insert or remove the SFP module while the port is powered on.
v
The operational or redundant loop performance is not affected when you install
or remove an SFP module.
v You must insert the SFP module into a port before you connect the fibre-optic
cable.
v You must remove the fibre-optic cable from the SFP module before you remove
the SFP module from the port. Refer to “Removing SFP modules” on page 45 for
more information.
v The maximum operating speed of the fibre channel port is determined by two
factors: the speed of the SFP module that is installed and the speed of the fibre
channel connection. For example, a 2-Gbps SFP that is plugged into a
4-Gbps-capable port will limit the speed of that port to a maximum of 2 Gbps.
Conversely, a 4-Gbps SFP that is plugged into a 2-Gbps-capable port will limit
the speed of the port to a maximum of 2 Gbps.
Attention: Carefully check the SFP's IBM part number, option number, and
FRU part number to identify its speed. There are no physical features that
distinguish a 4 Gbps from a 2 Gbps SFP.
Statement 3:
Chapter 3. Cabling the EXP810
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