Instruction manual

Page 2 Narrow to Wide SCSI Upgrade Instructions
PDI-00440-70, Rev. A01
For optimum performance, use only Wide SCSI-2 disk drives on the Wide SCSI bus. Mixing
SCSI-1, SCSI-2, and Wide SCSI-2 disks on the same bus tends to degrade performance and is
not recommended.
ELECTRONIC EQUIPMENT HANDLING PRECAUTIONS
With the AC power cord unplugged and the top cover removed, the components inside your computer
are vulnerable to damage caused by static discharge. Your body and clothing can store an electrical
charge that can damage or destroy unprotected electronic components. Before handling any computer
hardware, make sure your work area is properly protected against static discharge. There are a number of
commercially available static protection devices, like the wrist strap shown below, designed specifically
to protect your equipment from harmful static discharge.
Figure 1: Static Protection Wrist Strap
PREPARING FOR THE UPGRADE
Any time you remove your computer’s enclosure and expose your components, we recommend you
make sure the integrity of your data is protected by making a complete backup of the data on your hard
drive. You should also make sure you have a warm boot tape that will allow you to boot if your computer
is not able to do so from the hard drive. Refer to the
System Operator’s Guide
and
System Commands
Reference Manual
for information on backup and warm boot tape procedures.