IBM DS3950, Installation, User'S, And Maintenance Manual, Page: 131 / 252

Table 14. Power supply and fan unit LEDs (continued)
LED Normal Status Problem Status
Service Action Allowed (OK
to Remove) Off On
Service Action Required
(Fault) Off On
Direct Current Enabled On Off
Front LEDs
This section describes the primary LEDs and controls on the front of the DS3950
storage subsystem.
Table 15. Front LEDs and controls
LED Normal Status Problem Status
Drive Activity LED On (not flashing) - No data is
being processed
flashing - Data is being
processed
Off
Drive Fault LED Off
flashing - Drive, volume, or
storage array locate function
On (not flashing)
Global Locate On only when you activate
the locate function in the DS
Storage Manger Subsystem
Management window menu.
The normal state is off. N/A
Global Summary Fault Off On
Drive
activity
LED Drive
fault
LED Global
locate
LED Global
summary
fault
LED Global
power
LED Link
rate
switch
Figure 66. Front LEDs and controls
Chapter 4. Operating the storage subsystem
103