™ StorageWorks and the DIGITAL logo are trademarks of Digital Equipment Corporation.
EK–35XMN–IG .A01
©Digital Equipment Corporation 1997
May 1997
Printed in the U.S.A.
All Rights Reserved.
DIGITAL StorageWorks
Single-Ended I/O Module
Installation Guide
This guide describes the procedures for removing and
installing an ultra SCSI RAID single-ended I/O module (I/O
module) assembly, model DS–BA35X–MN.
CXO5816A
____________ CAUTION ________________
To protect this sensitive electronic device from
electrostatic discharge (ESD) use the following
precautions—(1) Wear an ESD wrist strap.
(2) Do not touch the printed circuit board or the
backplane connector. (3) Do not lay the device
on a work surface but place it on an electrostatic
mat. (4) Place the device in an electrostatic bag
for shipment.
__________________________________________
_____________ Caution _________________
Removing an I/O module disconnects the SCSI
bus TERMPOWER and will result in corrupted
and lost data. Therefore, you must turn off the
subsystem before removing the I/O module.
__________________________________________
Turning Off the
Subsystem
Complete the following procedure before removing or
installing an I/O module:
1. On the host, dismount the ultra SCSI RAID subsystem
storage devices.
2. Connect a maintenance terminal to the primary
controller.
3. Shut down the redundant controller by entering the
command—
shutdown other_controller
4. Shut down the primary controller by entering the
command—
shutdown this_controller
5. After shutting down both controllers, turn off the ac
power controllers in all the enclosures.
Removing an I/O Module
______________ Note ___________________
Complete this section only when you are replacing
an I/O module.
__________________________________________
After turning off the subsystem,, complete the following
procedure to remove an I/O module from the ultra SCSI
RAID enclosure.
1. Use a flat-tip screwdriver to loosen the two, spring-loaded
mounting screws on the module.
CXO5853A
Cable support
brackets
.
Grasp the module by the cable support bracket and pull it
directly to the rear to remove it from the enclosure
shroud.
Cut and remove the wire ties.
2. Loosen the thumb screws on the left module cable
connector.
Remove the cable and label it as Cable A.
3. Loosen the thumb screws on the right module cable
connector.
Remove the cable and label it as Cable B.
