Coordinates Of Scsi Devices; Host Adapter Number (Ha); Unixware Bus Number, Target Id And Lun; Configuration Example - Intel SRCU31A - Server RAID U3-1A Controller User Manual

Coordinates of SCSI Devices

Host Adapter Number (HA)

The host adapter number assigned to the Intel RAID Controller SRCU31 is derived from the PCI
slot number of the Intel RAID Controller SRCU31. Therefore, if there is only one Intel RAID
Controller SRCU31 installed in the PCI bus computer system, the host adapter number is 0. If
there are two Intel RAID Controller SRCU31s installed, the Intel RAID Controller SRCU31 with
the lower PCI Slot number is assigned host adapter number 0 and the Intel RAID Controller
SRCU31 with the higher PCI slot number is assigned host adapter 1.
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NOTE
After a cold boot, the Intel RAID Controller SRCU31 BIOS displays two messages, each beginning
with the controller's PCI slot number, for example, "[PCI 0/3] 4 MB RAM detected." The number
after the "/" is the slot number of the controller. This will help determine the order of the Intel
RAID Controller SRCU31s and which host adapter number is assigned to them by UnixWare.

UnixWare Bus Number, Target ID and LUN

Target IDs and LUNs for "Non-Direct Access Devices" (devices like streamers, tapes and
CD-ROMs and therefore not configurable via StorCon), are directly assigned to the SCSI ID and
the channel of the Intel RAID Controller SRCU31. Host drives are assigned in increasing order to
the free coordinates (bus number and target ID; LUN is always 0).

Configuration Example

In the PCI computer are two Intel RAID Controller SRCU31s (HA 0 = First Intel RAID Controller
SRCU31, HA 1 = Second Intel RAID Controller SRCU31), each with two SCSI channels.
1 Hard Disk Drive
1 Hard Disk Drive
1 Hard Disk Drive
1 Streamer SCSI ID 2, LUN 0 on SCSI channel A of HA0
1 CD-ROM SCSI ID 3, LUN 0 on SCSI channel B of HA0
1 DAT SCSI ID 2, LUN 0 on SCSI channel A of HA1
The resulting HA, Bus, Target ID, and LUN are indicated in Table 13.
74
as host drive no. 0 on HA0
as host drive no. 0 on HA1
as host drive no. 1 on HA1
Intel RAID SRCU31 Users Guide