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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

000810

101911

2021012

3031113

4041214

5051315

6061416

7071517

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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Adaptec GDTSETUP Installationshandbuch Seite 18