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Chapter 3 Storage Arrays 3-15
Cache Active light is off - The cache contains no data. Go to step 8.
Cache Active light is illuminated - Write-back caching is enabled and data is in the
cache. Wait for the data to clear from the cache memory and for the Fast Write Cache
or Cache Active light to turn off, and then go to step 8. For information on cache
memory protection and settings, refer to the Array Management Window online
help.
Caution – Potential damage to drives and data loss. Turning the power off and on
without waiting for the disk drives to spin down can damage the drives and may
cause data loss. Always let at least 30 seconds elapse from when you turn off the
power until you turn it on again.
8. Turn off both power switches on the back of the command module.
8Cache
Active
Green On Off (if
cache
enabled)
“Replacing
a Power
Supply” on
page 7-41
9 Fault Amber Off On
10 Drive Link Green On Off
11 Expansion
Port
Bypass
Amber Off On
Fan
12 Fan Fault Amber Off On “Replacing
a Fan” on
page 7-39
Power Supply
13 Power Green On Off “Replacing
a Power
Supply” on
page 7-41
14 Fault Amber Off On
Link Rate
15 2 Gb/s
Link Rate
Green On Not
Applicable
Not
Applicable
16 Tray ID
Conflict
Amber Off On - Tray
IDs
incorrect
“Setting
the Tray ID
Switch” on
page 3-29
TABLE 3-1 Lights on the Back of a Command Module
Location
Component
Light Color Normal Status
Problem
Status Procedure