Fujitsu BS2000 SE Series Operating Manual page 74

Front of the HNC
Hard disk drive control indicators
Figure 38: Front - Detailed view: Indicators on a hard disk module
1 HDD BUSY (green)
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2 HDD FAULT (orange) (in conjunction with a RAID controller)
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Lights up: HDD in active phase
Does not light up: HDD inactive
Does not light up: no HDD error
Lights up: HDD Faulty or Rebuild Stopped (drive defective, needs replacing, a rebuild
process was stopped or the HDD module is not correctly inserted)
Slow flashing: HDD Rebuild (the data is being restored after changing a hard disk drive)
Fast flashing: HDD Identify
Four fast flashes/pause: HDD Predicted Fault
Two fast flashes/pause: HDD Hot Spare (The corresponding drive has failed).
HNC (High Speed Net Connect)
U41859-J-Z126-2-76