StorCase Technology DE200i-SWCU2 - Manual (Page 25)

StorCase Technology, Inc. DE200i-SWCU2 User's Guide - Rev. A01
18 Appendix B - Factory-Installed Options
Appendix B - Factory-Installed Options
DE200 Ultra2 (LVD) Hot Swap /Repeater Isolator Board
The Ultra2 (LVD) Hot Swap/Repeater Isolator Board (Figure B-1) is an upgrade attachment for
the DE200i-SWCU2 receiving frame. This attachment provides a bus-isolating hot swap
feature, and a repeater function as described below.
Hot Swap Function
The Ultra2 (LVD) Hot Swap/Repeater Isolator Board (P/N DX1/200-U2/RH) allows the
installation, removal or exchange of Data Express carriers while your computer system is
operating by monitoring and protecting the computer system and other peripheral devices on
the SCSI Bus. The isolator board 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 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.
Repeater Function
The DE200 Hot Swap/Repeater Isolator Board also allows the DE200 to be used for Ultra2 (LVD)
applications which implement up to 15 SCSI devices. Without this isolator board installed, the
DE200i-SWCU2 can only support up to 9-drive Ultra2 (LVD) implementations.
Attaching the Isolator Board
The DE200i-SWCU2 may be purchased with the isolator board factory-installed. If the board
has not already been attached to the receiving frame, follow the instructions below to add the
board. Otherwise, proceed to the section "Using the Isolator Board" for usage instructions.
1. Remove jumpers on J4 Pins 7 & 8, and Pins 9 & 10 from the receiving frame motherboard
(Figure B-2).
NOTE: Save these jumpers! These jumpers are required when the isolator board
is not installed.