ICP RS Series User Manual page 109

Therefore, the first Host Drive has target-ID 0 / LUN 0 and the second target-ID 0 / LUN 1.
The formula for determining target ID and LUN from the existing Host Drive numbers yields
the following possible combinations for "Direct Access Devices":
Host Drive
number
0
1
2
3
4
5
6
7
This conversion is necessary because the single SCSI devices are not declared to the host
operating system in the order of their SCSI-IDs anymore, but according to the Host Drive
numbers they have in ICPCON. Host Drives are a prerequisite for the ICP Controller to be
able to link several SCSI devices to form a higher structure (i.e., RAID 5).
The sequence of the single Host Drives can be changed very easily by having ICPCON sort
them in its Configure Host Drives menu. In this way, it is also possible to change the boot
drive (it had previously been selected as boot drive because it has the lowest drive number,
that is, 0, and is therefore the first drive to be communicated to the system ).
Target ID and LUN of "Not Direct Access Devices" (devices such as streamers, tapes, CD-
ROMS, etc., not configurable with ICPCON) are determined on the basis of the SCSI-ID and
the SCSI channel used by the ICP Controller. These devices can only be configured with
SCSI-IDs 2 to 6. SCSI-ID 0 and 1 are reserved for hard disks, SCSI-ID 7 for the ICP Controller.
If "Not Direct Access Devices" are configured on SCSI-ID 0 or 1, they are not recognized
during the scanning process and can therefore not be used. The Target IDs of Not Direct Ac-
cess Devices are identical to their SCSI-ID, the LUN depends on the SCSI channel used (LUN 0
for SCSI channel A and LUN 4 for SCSI channel B). Note: After a cold boot the ICP BIOS
displays all connected devices with their physical coordinates, i. e. their SCSI-ID and SCSI-
LUN, (see "Chapter B, ICP Controller Function Check").
Target ID LUN
0 0
0 1
0 2
0 3
0 4
0 5
0 6
0 7
109
Host Drive Target ID
number
8 1
9 1
10 1
11 1
12 1
13 1
14 1
15 1
LUN
0
1
2
3
4
5
6
7