Important:
Depending
on
the
firmware
version
loaded
in
the
existing
drive
loop,
you
might
have
to
suspend
all
I/O
activity,
including
background
firmware
operations
such
as
hot
spare
rebuilds
or
copybacks,
to
the
DS4000
storage
subsystem
before
applying
the
firmware
updates.
Adding
the
EXP100
to
the
existing
drive
loop
After
completing
the
steps
in
complete
the
steps
in
this
section
to
add
the
new
EXP100
to
the
existing
drive
loop.
shows
an
example
of
a
DS4500
configured
with
four
drive
loops.
Drive
loops
A
and
B
form
one
redundant
Fibre
Channel
loop.
Drive
loops
C
and
D
form
the
second
redundant
Fibre
Channel
loop.
66
IBM
TotalStorage
DS4000
EXP100
Storage
Expansion
Enclosure:
Installation,
User’s
and
Maintenance
Guide
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Summary of Contents for TotalStorage EXP100
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