HP Surestore Disk Array 12h and FC60 - Manual (Page 191)

Attaching SCSI Cables and Configuring the Disk Enclosure Switches 191
Inst
alla
tion
Split-Bus Switch and Cabling Configurations
Split-bus cabling requires two SCSI cables from each disk enclosure to the controller
enclosure. Split-bus cabling is typically used for installations with 3 or fewer disk
enclosures. Cabling for a split-bus configuration is shown in
Figure 71 .
Note For consistency and ease of managment, it is recommended that you observe
the following rules:
- Connect channels 1 and 2 on the controller enclosure to the disk enclosure
mounted directly beneath the controller enclosure. Connect channels 3 and 4 to
the next disk enclosure down, and channels 5 and 6 to the next enclosure down.
- Install cables along the left side of the disk enclosure connectors (as viewed
from the back of the rack) and install terminators along the right side
connectors.
To configure the disk array for split-bus operation:
1. Connect one end of a SCSI cable to the controller enclosure SCSI channel 1 connector,
J12 JVD ARRAY SCSI 1 (see Figure 71 ).
2. Connect the other end of the SCSI cable to the disk enclosure BCC A, SCSI connector B.
3. Connect a second SCSI cable to the controller enclosure SCSI channel 2 connector, J11
JVD ARRAY SCSI 2.
4. Connect the other end of the SCSI cable to the disk enclosure BCC B, SCSI connector A .
Note The lower BCC is inverted from the upper BCC. Make sure you take this into
account when setting the switches.
5. Set the Enclosure (Tray) ID rotary switches on both BCCs to “0”. See Figure 70 .
6. Set all segments of the Enclosure DIP switches on both BCCs to “0”.
7. Connect a SCSI terminator to the remaining SCSI connector on each BCC.
8. Repeat the preceding steps for the remaining disk enclosures, using the next sequential
SCSI channels and incrementing the Disk Enclosure (Tray) ID setting for each
enclosure.