Chapter 1 Introduction
12
Storage Center SC8000 Controller Deployment Guide
SC280 SAS Enclosures
SAS
enclosures
hold
drives
for
data
storage
and
connect
to
the
controllers
through
back
‐
end
ports.
The
Storage
Center
SC280
is
a
5U
size
6
GB
SAS
enclosure.
The
SC280
enclosure
supports
up
to
84
hard
drives
installed
in
two
drawers
of
42
drives
each.
The
SC280
enclosures
also
contain
two
power
supply
units,
five
cooling
fan
modules,
and
two
redundant
enclosure
management
modules
(EMMs).
The
following
requirements
apply
to
SC280
enclosures:
SC280
enclosures
cannot
be
connected
to
the
same
chain
as
any
other
enclosures.
Each
chain
supports
a
maximum
of
two
SC280
enclosures.
A
SAS
IO
card
can
support
mixed
chains
(for
example,
a
chain
of
SC280
enclosures,
and
a
chain
of
SC200
enclosures),
however
the
enclosures
must
all
be
6
GB.
Controllers
must
be
running
Storage
Center
OS
6.4.1
or
later
to
detect
SC280
enclosures.
Caution:
The
power
supplies
must
be
of
the
same
input
type
and
have
the
same
maximum
output
power.
Mismatched
power
supplies
result
in
an
error
condition.
Caution:
AC
power
supplies
support
both
220
V
and
110
V
input
voltages.
When
two
identical
power
supplies
receive
different
input
voltages,
they
can
output
different
wattages
and
trigger
a
mismatch.
Caution:
When
correcting
a
power
supply
mismatch,
replace
only
the
power
supply
with
the
flashing
indicator.
Swapping
the
opposite
power
supply
to
make
a
matched
pair
can
result
in
an
error
condition
and
unexpected
controller
shutdown.
