Adaptec GDTSETUP Manual de usuario descargar pdf (Pagina 5)

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Example: If a host-drive no. 13 exists (target-ID=1, LUN=5), there also has to be a host-drive

with number 8 (target-ID=1, LUN=0). Please keep this in mind when assigning the numbers

in GDTSETUP. Target ID and LUN of "Not Direct Access Devices" (devices such as stream-

ers, tapes, CD-ROMS, etc., not configurable with GDTSETUP) must be 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 Access Devices are identical to their SCSI-IDs, 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 GDT BIOS displays all connected devices with their physical coordinates, i.e., their

SCSI-ID and SCSI-LUN, (see "Chapter B, ICP Controller Function Check").

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2A20

3A30

4A40

5A50

6A60

2B24

3B34

4B44

5B54

6B64

Having to determine the Target ID and LUN in such a complicated manner might seem

rather awkward. However, it is necessary to do so because the ICP Controllers have more

than one SCSI channel, whereas UNIX can only manage host adapters with one SCSI chan-

nel. Therefore, the GDT UNIX driver has to make the appropriate transformations.

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In the PCI computer are two ICP Controllers (HA 0 = 1st GDT, HA 1 = 2nd GDT), each having

two SCSI channels.

1 hard disk as Host Drive no. 0 on HA0

1 hard disk as Host Drive no. 0 on HA1

1 hard disk as Host Drive no. 1 on HA1

1 Streamer SCSI-ID 2, LUN 0 on SCSI channel A of HA0

1 CD-ROM SCSI-ID 3, LUN 0 on SCSI channel A of HA0

1 DAT SCSI-ID 2, LUN 0 on SCSI channel B of HA1

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HA Target-ID LUN Device

0001

hard disk, Host Drive no. 0 (boot- and

installation drive)

0 2 0 Streamer

0 3 0 CD-ROM

1 0 0 hard disk, Host Drive no. 0

1 0 1 hard disk, Host Drive no. 1

124DAT

1 2 3 4 5 6

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Adaptec GDTSETUP Manual de usuario Pagina 5

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