StorCase Technology DE75i-SW - Manual (Page 26)

DE75i-SW User's Guide - Rev. A01 StorCase Technology, Inc.
Appendix B - Factory-Installed Options 19
Appendix B - Factory-Installed Options
Hot Swap Board
The DE75 SCSI Hot Swap Board allows the installation, removal or exchange of DE75i-SW
carriers while your computer system is operating by monitoring and protecting the computer
system and other peripheral devices on the SCSI Bus. The Hot Swap option eliminates the
need to shut down your system when adding or removing a SCSI device by performing two
functions:
1. Delays power up/down of the drive until the time period between SCSI bus cycles.
This prevents the interruption of any SCSI bus activity being done by other devices
on the bus.
2. Prevents drive power sequencing from generating noise on the SCSI bus, thus
preventing data transfer corruption on other devices.
NOTE: Although the Hot Swap Board permits the hot swapping of devices on the
SCSI Bus, the system software may not recognize the newly installed or
removed device. Most systems scan the SCSI Bus at start-up. If the
system software does not support hot swapping, there are two
alternatives:
1. Purchase or locate third party software that scans the SCSI Bus. It is readily
available for most systems.
2. Reboot the system. This will force the system to rescan the SCSI Bus.
Attaching the Hot Swap Board
The DE75 may be purchased with the Hot Swap option factory-installed. If the Hot Swap Board
has not already been attached to the DE75i-SW receiving frame, follow the instructions below
to add the Hot Swap Board. Otherwise, proceed to the section "Using the Hot Swap Board"
for usage instructions.
1. Remove the jumper on the receiving frame motherboard option Pins 21 and 22. Option
jumper at Pins 9 & 10 must be installed (default setting) to disable on-board termination
at the receiving frame motherboard (Figure 5). The Hot Swap Board (Figure B-2),
will control onboard termination. Removing jumper JP1 will enable termination.
2. Carefully align the connectors of the Hot Swap Board with the connectors on the
receiving frame motherboard and gently push the Hot Swap Board into position.
Make certain that all connectors are properly mated.
3. Attach the Hot Swap Board to the receiving frame stand-offs with the two (2)
provided screws (Figure B-1).