HP AA988A - Modular Smart Array Storage Controller SCSI User Manual page 21

The components and LEDs on the front of a drive enclosure are the same as on a
controller enclosure; see Figure 1-1 and Table 1-2.
Figure 1-4 shows the ports and switches at the back of the drive enclosure.
Power switch
Figure 1-4 Drive Enclosure Ports and Switches (Back View)
Table 1-7 describes the ports and switches on the back of the drive enclosure.
Table 1-7 Drive Enclosure Ports and Switches (Back)
Location Port/Switch
Power-and- Power switch
cooling module
Expansion SAS In port
module
Expansion SAS Out port
module
Expansion Service port
module
SAS In port Service port
Description
On/Off toggle
3-Gbps, 4-lane (12 Gbps total) subtractive ingress port used to
connect to a controller enclosure.
3-Gbps, 4-lane (12 Gbps total) table-routed egress port used to
connect to another drive enclosure.
Micro-DB9 port used by service personnel only.
SAS Out port
Chapter 1 System Components 21