IBM Ultra320, Installation And Using Manual

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Appendix C. Connecting SCSI Hard Disk Drives to the Adapter
The RAID adapter connects to a hard disk drive through one of two possible SCSI channels. The
connected hard disk drives can be inside the host system unit, outside the system unit in a hard disk drive
enclosure, or both. Each hard disk drive on a SCSI channel must have a unique SCSI ID of 0 through 6,
8, 9, A, B, C, D, E, or F.
The addressing scheme is in hex notation. Address 7 is reserved for the adapter and is not to be used for
another SCSI hard disk drive. Each of the SCSI channels (0 and 1) is assigned a channel ID. The channel
ID and SCSI ID are used to fully identify a hard disk drive connected to the adapter. For optimum overall
performance and data protection, distribute hard disk drives evenly across the two available channels.
1 Channel 1 external, 68-position, VHDCI (very high density cable interconnect)
2 Channel 0 external, 68-position, VHDCI (very high density cable interconnect)
3 Channel 0 internal, 68-position, high-density plastic D-shell SCSI standard connector for 16-bit
attachment
4 Channel 1 internal, 68-position, high-density plastic D-shell SCSI standard connector for 16-bit
attachment
5 Adapter Handle
Figure 2. PCI-X Dual Channel Ultra320 SCSI RAID Adapter
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