StorCase Technology DE75i-SWC - Manual (Page 25)

18 Appendix B - Factory-Installed Options
StorCase Technology Inc. DE75i-SWC User's Guide - Rev. B00
Appendix B - Factory-Installed Options
Hot Swap Board
The DE75 SCSI Hot Swap Board (part number DX75-SWC/H) allows the installation,
removal or exchange of DE75i-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 DE75i-SWC may be purchased with the Hot Swap option factory-installed. If the Hot
Swap Board has not already been attached to the DE75i-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 jumper on the receiving frame motherboard option Pins 21 and 22.
Option jumper at Pins 9 and 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 (Refer to the next section "Jumper Options").
NOTE: Save these jumper(s)! These jumper(s) are required when the Hot
Swap Board is not installed.
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).