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Drive Enclosure Device Addressing - IBM DCS9550 1S1 Installation & Service Manual

Storage expansion unit
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Installation
Figure 2–9
2.8

Drive Enclosure Device Addressing

Each enclosure has 16 drive bays. The SEL_ID of each drive is determined by the device slot
(0-15) in which it is installed and the address range setting, which is set by means of the
Enclosure ID switch on the Ops Panel (shown in
enclosure. The switch settings are shown in Table 2–2
Table 2–2
Switch
Number
1 thru 6
7 & 8
DCS9550 Controllers
9 & 10
DCS9550 Controllers
24
Installing an SCM I/O Module in Bay 4
Ops Panel Switch Functions (Default settings for DCS9550 1S1 Storage Expansion Unit
SCM usage at 1Gb/s)
Function
Not Used
Drive Loop
Speed Select
Drive
Addressing
Mode Selection
IBM System Storage DCS9550 1S1 Storage Expansion Unit Installation, Service, and User Guide
Figure 1–2 on page
Recommended
Setting
Off
Sw 7
Sw 8
On
Off
Sw 9
Sw 10
Off
On
2) at the rear of the
Definition
Force 2Gb/s
Mode 1

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