HP LH4r HP Netserver Service Handbook, Volume 2 - Mid - Page 166

Upper, Lower

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Configuring Switch Settings on the Hot Swap Subsystem Switches 3, 4 and 6 determine the SCSI address of the shelf. Off On 1 2 3 4 UPPER CAGE 5 6 1 2 LOWER 3 CAGE 4 5 6 The switch 6 setting determines upper and lower cage functionality. Switches 1 and 2 are always set to Off. Switch 1 2 3 Function I2C Bus Setting I2C Bus Setting High/Low Addresses Fast-Wide (68 pin) SCSI Only Sets SCSI addresses for upper or power eight addresses Settings Always set to Off Always set to Off On Sets drives to upper eight SCSI addresses. Note: this setting may cause time-out problems with your NOS due to delayed start. Off Sets drives to lower eight SCSI addresses. 4 SCSI Address Zero On Sets middle shelf in the cage (shelf Sets middle shelf in cage to SCSI ID 0 or ID 8. 2 or shelf 5) to SCSI ID 0 or ID 8. ID number depends on the setting of switch 3. Off Sets middle shelf to normal SCSI address sequence. 5 Remote Start On Internal control: Upper cage is set Determines control of the hot swap disk module power-on sequence. to delayed start, and lower cage is set to power-on at startup. Off Power-on sequence is determined by the disk array controller. Not supported by HP SCSI controller boards. 6 Upper/Lower Cage On Lower cage Identifies cage location. This is important information for the SCSI addresses and for the I2C bus. Off Upper cage 158

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158
Configuring Switch Settings on the Hot Swap Subsystem
Switches 3, 4 and 6 determine the SCSI address of the shelf.
UPPER
CAGE
1
2
3
4
5
6
LOWER
CAGE
1
2
3
4
5
6
Off
On
The switch 6 setting determines upper and lower cage functionality. Switches 1 and 2 are always set to Off.
Switch
Function
Settings
1
I
2
C Bus Setting
Always set to
Off
2
I
2
C Bus Setting
Always set to
Off
3
High/Low Addresses
Fast-Wide (68 pin) SCSI Only
Sets SCSI addresses for upper or power eight
addresses
On
Sets drives to upper eight SCSI
addresses.
Note:
this setting may cause
time-out problems with your NOS due to
delayed start.
Off
Sets drives to lower eight SCSI
addresses.
4
SCSI Address Zero
Sets middle shelf in cage to SCSI ID 0 or ID 8.
ID number depends on the setting of switch 3.
On
Sets middle shelf in the cage (shelf
2 or shelf 5) to SCSI ID 0 or ID 8.
Off
Sets middle shelf to normal SCSI
address sequence.
5
Remote Start
Determines control of the hot swap disk module
power-on sequence.
On
Internal control: Upper cage is set
to delayed start, and lower cage is set to
power-on at startup.
Off
Power-on sequence is
determined by the disk array
controller.
Not supported by HP SCSI controller
boards.
6
Upper/Lower Cage
Identifies cage location. This is important
information for the SCSI addresses and for the
I
2
C bus.
On
Lower cage
Off
Upper cage