2. Carefully pull on the connector to remove the cable from the SFP module, as
shown in Figure 31.
Figure
31.
Removing
the
LC-LC
fibre-channel
cable
3. Replace the protective caps on the cable ends.
4. Replace the protective cap on the SFP module.
Cabling
rules
and
recommendations
Refer to these general rules and recommendations when completing the cabling
steps in “Cabling the EXP810 to a storage subsystem” on page 51.
v
Do not connect a combination of more than seven EXP810 storage expansion
enclosures to the two ports of a dual-ported drive channel. Failure to observe this
limitation might result in loss of data availability. In the DS4700 Express Storage
Subsystem environment, no more than six EXP810 storage expansion
enclosures can be connected to the two ports of a dual-ported drive channel
because of the internal drive slots in the DS4700 Express Storage Subsystem.
v
Do not connect more than four EXP810 storage expansion enclosures to
each
port of a dual-ported drive channel.
v
It is recommended that you add storage expansion enclosures to the DS4800
drive ports in a round-robin fashion. For example, if you have four EXP810s to
be cabled to the DS4800, instead of cabling all four EXP810s to one drive port of
a drive channel, distribute the enclosures to all drive ports, which results in one
enclosure per drive port of a drive channel.
v
When mixing 14-drive storage expansion enclosures (such as EXP710s) and
16-drive storage expansion enclosures (such as EXP810s), the maximum
number of expansion enclosures is seven per redundant drive channel pair when
attaching to the DS4000 storage subsystem with no internal drive slots (such as
the DS4500 or DS4800). The maximum number of enclosures is reduced to six
per redundant drive channel pair when attaching to a DS4000 storage subsystem
with internal drive slots (such as the DS4300 or DS4700).
v
The DS4800 Storage Subsystem supports storage expansion enclosures
operating at different fibre channel speeds (2 Gbps or 4 Gbps) only when they
are installed in separate redundant drive channel pairs. The DS4800 Storage
Subsystem does not support a mix of storage expansion enclosures operating at
different fibre channel speed in the same redundant drive channel pair.
v
The DS4300, DS4500, DS4700 Express, and DS4800 support a mix of EXP100,
EXP710, and EXP810 storage expansion enclosures in the same redundant drive
channel pair. DS4300 dual controller Standard and Turbo model and DS4500
support this feature with firmware level 6.19.xx.xx or higher. DS4700 and DS4800
support this feature with firmware level of 6.23.xx.xx or higher. However it is
50
IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide
Summary of Contents for DS4000 EXP810
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