IBM DS3950, Руководство пользователя и инструкция по установке

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rack, such as a properly grounded 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 DS3950 storage
subsystem or other storage expansion enclosures.
Note: IBM SFP options have been tested and approved for the IBM DS storage
products. For optimal performance and compatibility, always use IBM SFP
options when installing the IBM DS products.
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 in any of the FC ports in
the FC drive loops. (Long-wave SFPs 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 35 for
more information.
Statement 3:
Chapter 3. Cabling the EXP395
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