Adaptec 1542B - AHA Storage Controller Fast SCSI 10 MBps Przewodnik Instalacji Strona 27

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For example, set the tape drive’s SCSI ID to 7 using jumpers or an external switch.
Then set the AHA-274x SCSI ID to 6 using the ECU. (Use the configuration BIOS
accessed by Ctrl-A at boot to change the setting on the AHA-284x.)
A large disk used with the Solaris operating environment on an AIC-7770
controller cannot be mounted on a controller with a different geometry; the DPT
PM-2022 controller, for example.
Some VESA local bus motherboards do not support more than one bus master
controller, like the AHA-2840VL host bus adapter.
When using AHA-2742T and AHA-2842VL adapters with slow tape devices,
under heavy loads error messages like this are displayed:
Warning: /eisa/esa@2c00/cmtp@4,0 (Tape4):
0.25 inch cartridge
Tape 11: Fixed record length (512 byte blocks) I/O
Set the SCSI ID of the tape drive higher than the host bus adapter.
For example, set the tape SCSI ID to 6 and the host bus adapter SCSI ID to 5 or less
by doing the following:
Log in as root and shut down the Solaris operating environment.
Boot DOS and change the target ID of the host bus adapter to 5 using the ECU
supplied by the motherboard manufacturer.
Turn off the computer and power down the tape.
Jumper the tape device to SCSI ID 6.
Boot the Solaris operating environment and run the drvconfig and tapes
utilities.
Configuration Procedure
1. Select channel A as the Primary Channel.
2. Run the BIOS configuration and verify that BIOS support for more than two
drives is disabled.
3. If there are multiple AIC-7770 controllers on one system, the order of the I/O
base addresses must match the order of the BIOS base addresses.
On an EISA motherboard, the I/O base address corresponds to the EISA slot
number times 0x1000 plus 0xC00 for controller boards. For example, if the first
slot has an AHA-274x controller, the address is 0x1C00, and if the adjacent slot
also has an AHA-274x controller, the address is 0x2C00. Motherboard
manufacturers usually map the controller chip on the motherboard at the highest
Device Reference Pages 15
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