The summary is simple:
One cannot use SCSI ID above 7 (7 is the hostadapter, so 6 is the last
ID) on Tru64 before V5.0.
The SCSI man pages states, the the device numbers are 4 bit. That would
allow for 16 ID on a single bus, but the OS strips off the high bit and
recognized only 8 (0 to 7) devices.
>From the man page man SCSI:
...
The following diagram describes the minor numbers for SCSI disk
devices:
----------------------------------------------------------
Bits: | 19 14 | 13 10 | 9 6 | 5 0
|
----------------------------------------------------------
| Bus no. | Target ID | LUN | Partition no.
|
----------------------------------------------------------
The following diagram describes the minor numbers for SCSI tape
devices:
-----------------------------------------------------------
Bits: | 19 14 | 13 10 | 9 6 | 5 1 | 0
|
-----------------------------------------------------------
| Bus no. | Target ID | LUN | Density | No rewind
|
-----------------------------------------------------------
....
But, as denoted above: up to V5.0 the high bit of the target ID is
stripped off.
Thanks to all, who responded that fast.
Received on Fri Feb 16 2001 - 16:01:16 NZDT