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81,;7DUJHW,'DQG/81
Target-IDs 0 and 1 with LUN 0 to 7 are reserved for
"Direct Access Devices"
(devices beha-
ving like a hard disk or a removable hard and therefore configurable with GDTSETUP). The-
re is a correlation between the Host Drive number GDTSETUP assigns (menu
Configure Host
Drives
), and the assigned target-ID and LUN:
Host-Drive Number = 8 * Target-ID + LUN
The Host Drive number is the number the drive is given in the list of available Host Drives
in the GDTSETUP program. The following exemplary screen shows a list of Host Drives. In
this example, there are two Host Drives installed.
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":
+RVW'ULYH
QXPEHU
7DUJHW,' /81
+RVW'ULYH
QXPEHU
7DUJHW,'
/81
0
0
0
8
1
0
1
0
1
9
1
1
2
0
2
10
1
2
3
0
3
11
1
3
4
0
4
12
1
4
5
0
5
13
1
5
6
0
6
14
1
6
7
0
7
15
1
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 GDTSETUP. 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 GDTSETUP
sort them in its
Configure Host Drives
menu. In this way, it is also possible to change the boot
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