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SAS and SATA Hard Drive - LED Combinations/Behavior Explained

Information

The table below shows the different status of the LEDs being steadily On, Off or flashing including in different colors to show the status of the SAS or SATA hard drive.

Details

Online/Activity
LED (green)
Fault/UID LED
(amber/blue)
Interpretation
On, off, or flashing
Alternating amber and blue
The drive has failed, or a predictive failure alert has been received for this drive; it also has been selected by a management application.
On, off, or flashing
Steadily blue
The drive has failed, or a predictive failure alert has been received for this drive; it also has been selected by a management application.
On
Amber, flashing regularly (1 Hz)
A predictive failure alert has been received for this drive. Replace the drive as soon as possible.
On
Off
The drive is online, but it is not currently active
Flashing regularly (1 Hz)
Amber, flashing regularly (1 Hz)
Do not remove the drive. Removing a drive may terminate the current operation and cause data loss. The drive is part of an array that is undergoing capacity expansion or stripe migration, but a predictive failure alert has been received for this drive. To minimize the risk of data loss, do not replace the drive until the expansion or migration is complete.
Flashing regularly (1 Hz)
Off
Do not remove the drive. Removing a drive may terminate the current operation and cause data loss. The drive is rebuilding, or it is part of an array that is undergoing capacity expansion or stripe migration.
Flashing irregularly
Amber, flashing regularly (1 Hz)
The drive is active, but a predictive failure alert has been received for this drive. Replace the drive as soon as possible.
Flashing irregularly
Off
The drive is active, and it is operating normally.
Off
Steadily amber
Steadily amber A critical fault condition has been identified for this drive, and the controller has placed it offline. Replace the drive as soon as possible.
Off
Amber, flashing regularly (1 Hz)
A predictive failure alert has been received for this drive. Replace the drive as soon as possible
Off
Off
The drive is offline, a spare, or not configured as part of an array
NOTE: It is also seen that the hard drives fail with steady red light on them.

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