HP Disk System 2300 HP StorageWorks Disk System 2300 User's Guide(This manual - Page 19

BCCs and BCC Filler Panels, slots 0

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Product Description BCCs and BCC Filler Panels BCCs (Bus Control Cards) plug into two slots in the back of the disk system. Each BCC connects to both LVD (low voltage differential) buses inside the disk system. In full bus mode (DIP switch 1 set to "|"), both BCCs have access to all installed disks. The two SCSI buses are bridged. If either BCC fails and LVM primary and alternate paths are defined, data can be accessed through the other BCC. In split bus mode (DIP switch 1 set to "0"), the left BCC (as viewed from the rear of the disk system), is on the high numbered bank (with disk slots 8, 9, 10, 11,12, 13, and 14) and the right BCC is on the low numbered bank (with disk slots 0, 1, 2, 3,4, 5, and 6) of disk slots. See Figure 1. Two SCSI ports (B in Figure 4) on each BCC provide dual LVD connections to the same or separate hosts. If a host is connected to one of the BCC ports, an LVD terminator must be connected to the other port on that BCC. Product Description 19

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Product Description
19
Product Description
BCCs and BCC Filler Panels
BCCs (Bus Control Cards) plug into two slots in the back of the disk system.
Each BCC connects to both LVD (low voltage differential) buses inside the disk
system. In full bus mode (DIP switch 1 set to “|”), both BCCs have access to all
installed disks. The two SCSI buses are bridged. If either BCC fails and LVM
primary and alternate paths are defined, data can be accessed through the other
BCC. In split bus mode (DIP switch 1 set to “0”), the left BCC (as viewed from
the rear of the disk system), is on the high numbered bank (with disk slots 8, 9,
10, 11,12, 13, and 14) and the right BCC is on the low numbered bank (with disk
slots 0, 1, 2, 3,4, 5, and 6) of disk slots. See Figure 1.
Two SCSI ports (B in Figure 4) on each BCC provide dual LVD connections to
the same or separate hosts. If a host is connected to one of the BCC ports, an
LVD terminator must be connected to the other port on that BCC.