ATTO Technology Diamond Storage Array VT-Class - Manual (Page 19)

8
Components
Rack mount model
The system management card
is at the left front of the case.
At its center is a DB-9 serial
RS-232 port 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 Diamond-VT 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 Diamond-VT and is available in a 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 Diamond-VT. 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