Specifications

3/96 Application Module
X
Service 47
Honeywell Inc.
Section 5—Hard Disk Drive Tray
5.1 Drive Tray Description
Overview
The Hard Disk Drive Tray (HDDT) contains the coprocessor hard disk
drive(s). A maximum of two drives can exist in this tray.
The primary (first) drive is always mounted on the right side. This is done
for cooling reasons and must be adhered to in all cases. This drive will
always have device address 6 (physical pinning).
An optional second drive is mounted on the left side. This drive will always
have device address 5 (physical pinning).
A printed circuit board in the tray is used to provide a means of connecting
the SCSI bus to each drive as well as routing it through the backplane to the
HDDT I/O board. DC power from the backplane is also routed through this
board to the disk drives.
Disk drives are separately replaceable in the event of failure. The drive tray
(including internal circuit board) is only replaceable as a single unit. When
ordering a replacement drive tray, it will be supplied without drives. Disk
drives are ordered separately.
The spare parts section of this manual supports this replacement strategy.
Hard disk drive
tray (front view)
The following illustration shows the hard disk drive tray as you would see
it after removing it from the node chassis. Notice the placement of the disk
drives. The primary drive is always mounted on the right side of the tray.
51172
Optional 2nd Drive
(Address 5)
Tray Cover
SCSI Interface Cable
(From Coprocessor)
Primary Drive
(Address 6)
Slot to View
Drive Indicators