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8
Components
which allows a connection
for setup, monitoring and
upgrade of the unit from
any computer system with
an RS-232 interface. The
optional 10/100 BaseT
Ethernet management
services card enables
Telnet-based monitoring
and management. It also
provides the ability to
update the firmware in the
array via FTP. LEDs
farthest to the left indicate
fault, unit ready, Host
Interface cards A and B
installation status, and the
power status for each
power supply.
To the right of the system
management card are
individual disk drive sleds
which also have LED
indicators for each drive’s
status. Each sled contains two hard drives. Up to
24 hard drives may be installed on the 12 sleds.
Empty bays should be covered by blank
faceplates or filled with empty sleds to promote
effective cooling. Access is provided by
loosening two screws and pulling on the sled
handle.
In the rear of the unit are the blower assemblies
which support hard drive, cabinet and power
supply cooling. Correct operation is displayed by
a LED at the top of each panel. The blowers are
held in place by removable screws.
The power supplies for the array are accessible by
loosening two screws and pulling on the power
supply module handle. The power standby on/off
switch is at the top of each module. A yellow LED
indicates
caution
and a green LED indicates
on
.
The power cord socket is at the bottom of each
power supply.
Between the power supplies and blower
assemblies are two slots that hold the Host
Interface cards. The HIC is the connection point
into the array and is available in 2-Gigabit Fibre
Channel, or Ultra 160 SCSI. Host Interface cards
have
fault
and
on-line
or
fault
and
activity
LED
indicators, depending on the model.
SCSI
The SCSI card faceplate has a rotary
binary-coded hex switch which allows you to set
the SCSI ID of the array. The SCSI card also has
an in channel, to connect by a cable to the unit’s
communication source, and an out channel,
available for daisy-chaining arrays together or to
complete termination using an external LVD
terminator.
Intelligent midplane (internal)
Disk drive sleds (12)
System Management Card
Power supplies
Host interface cards
Blower assemblies