ICP GRD RD Series, Руководство пользователя

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numbers in GDTSETUP. Target ID and LUN of " Not Direct Access Devices " (devices such
as streamers, 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: Af-
ter a cold boot, the GDT BIOS displays all connected devices with their physical coordina-
tes, i.e., their SCSI-ID and SCSI-LUN, (see "Chapter B, ICP Controller Function Check").
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2 A 2 0
3 A 3 0
4 A 4 0
5 A 5 0
6 A 6 0
2 B 2 4
3 B 3 4
4 B 4 4
5 B 5 4
6 B 6 4
Having to determine the Target ID and LUN in such a complicated manner might seem rat-
her 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 channel.
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
0 0 0 1st 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
1 2 4 DAT