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Table 1–1
Switch Number
*See Sw 11
DCS9550 Controller Settings
DCS9550 Controller Settings
DCS9550 Controller Settings
Important
Switch settings are only read at Power On.
1.2.3
SCM Input/Output Module
The DCS9550 1S1 Storage Expansion Unit includes an enclosure with rear facing bays which houses one or two
SATA Control Interface Adaptor (SCM I/O) modules (see
The plug-in SCM I/O modules have been designed for integration into a DCS9550 1S1 Storage Expansion Unit,
providing external FCAL cable interfacing with up to 16 SATA disk drives.
Processors housed on the SCM I/O modules provide enclosure management and interface to devices on the
Backplane, PSU, SCM and Ops Panel, to monitor internal functions.
The module incorporates the following LED indicators:
Host
Important
If only one SCM module is fitted, the SCM module must be installed in Rear Bay 4 location [see
Figure 1–3, "Enclosure Chassis (Rear)", on page
bay.
Table 1–2
LED
FC Host Port 0
Signal Good
IBM System Storage DCS9550 1S1 Storage Expansion Unit Installation, Service, and User Guide
Ops Panel Switch Functions (Default settings for DCS9550 1S1 Storage Expansion
UnitSCM usage at 2Gb/s)
Function
Drive Loop Speed
7 & 8
Select
Drive Addressing
9 & 10
Mode Selection
SOFT SELECT
11
12
Not Used
Note: * Please contact your supplier for further information.
SCM I/O Module LEDs
Definition
Incoming FC signal is GOOD
No connection or incorrect connection
Invalid SFP connection
Recommended Setting
Sw 7
Sw 8
Off
Off
On
Off
Sw 9
Sw 10
Off
On
On
On
On
Off
Off
Off
On
Off
Figure
1–3), dependent on configuration required.
2] and a Blank I/O module fitted in the unused
Introduction
Definition
Force 1Gb/s
Force 2Gb/s (recommended)
Mode 1
Mode 0
Mode 2
Mode 3 (not supported)*
Selects functions using the
hardware switches
Color
Normal
Fault
Status
Status
Green
On
Flashing
Off
5
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