HP LH4r HP NetRAID-4M Installation Guide - Page 20

Connecting SCSI Devices, and 3 of the HP NetRAID-4M controller.

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Hewlett-Packard NetRAID-4M Controller Installation Guide Channels 0 and 1, connect the cable to pins 3 and 4 of the LED connector on the HP NetRAID-4M. To show activity on Channels 2 and 3, connect the cable to pins 1 and 2. Pins 1 and 4 are ground pins. Note: If you are using non-SCSI disk drives (for example, IDE), the LED will no longer indicate activity on these drives when you connect the LED cable to the HP NetRAID4M. 2-pin LED Cable 1 Shows Combined Activity on Channels 0 and 1 only 2-pin LED Cable 1 Shows Combined Activity on Channels 2 and 3 only Figure 2-4. Connecting the LED Activity Indicator Connecting SCSI Devices You can connect internal or external SCSI devices, or a combination of internal and external SCSI devices to each channel (Channels 0, 1, 2, and 3) of the HP NetRAID-4M controller. Each channel supports up to 15 SCSI devices, either Ultra 3 devices alone or a combination with Ultra2 SCSI, Ultra2, Ultra, and Fast devices. We recommend keeping Ultra 3 devices on separate channels from non-Ultra 3 devices. Peak transfer rates on Ultra 3 2-6

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Hewlett-Packard NetRAID-4M Controller Installation Guide
Channels 0 and 1, connect the cable to pins 3 and 4 of the LED
connector on the HP NetRAID-4M. To show activity on Channels 2
and 3, connect the cable to pins 1 and 2. Pins 1 and 4 are ground
pins.
Note:
If you are using non-SCSI disk drives (for example,
IDE), the LED will no longer indicate activity on these
drives when you connect the LED cable to the HP NetRAID-
4M.
Connecting SCSI Devices
You can connect internal or external SCSI devices, or a combination
of internal and external SCSI devices to each channel (Channels 0, 1, 2,
and 3) of the HP NetRAID-4M controller.
Each channel supports up to 15 SCSI devices, either Ultra 3 devices
alone or a combination with Ultra2 SCSI, Ultra2, Ultra, and Fast
devices. We recommend keeping Ultra 3 devices on separate
channels from non-Ultra 3 devices. Peak transfer rates on Ultra 3
1
2-pin
LED
Cable
Shows Combined
Activity on Channels
0 and 1 only
1
2-pin
LED
Cable
Shows Combined
Activity on Channels
2 and 3 only
Figure 2-4. Connecting the LED Activity Indicator