StorCase Technology DE300i-SWC - Manual (Page 25)

18 Appendix B - Factory-Installed Options
StorCase Technology Inc. DE300i-SWC User's Guide - Rev. A00
Appendix B - Factory-Installed Options
DE300 Hot Swap Board
The DE300 SCSI Hot Swap Board (part number DX300-SWC/H) allows the installation,
removal or exchange of DE300i-SWC 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.
Please note that, whereas UNIX and Apple-based systems provide mount/dismount drive
commands, most PC systems do not provide such a feature. When using one of these
operating systems, it may be necessary to reboot the computer after adding or changing
a drive. This reboot activity will force the SCSI host adapter to rescan its SCSI bus for
physically attached drives, and will then be able to access the new or changed drive.
Attaching the Hot Swap Board
The DE300i-SWC may be purchased with the Hot Swap option factory-installed. If the Hot
Swap Board has not already been attached to the DE300i-SWC 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 two (2) Phillips head machine screws from the receiving frame
motherboard and set aside (Figure B-1).
2. Remove jumpers on the receiving frame motherboard J3A, J3B, and J3C Pins 21
and 22 (Figure 5). Option jumpers at Pins 9 and 10 must be installed (default
setting) to disable onboard termination at the receiving frame motherboard
(Figure 5). The Hot Swap Board (Figure B-2), will control onboard termination.
Removing jumpers JTA, JTB, or JTC, will enable termination at the corresponding
drive.
NOTE: Save these jumpers! These jumpers are required when the Hot Swap
Board is not installed.
3. Attach the two (2) provided stand-offs into the receiving frame motherboard
holes in place of the two removed screws. 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.