Enlight EN-898X - Manual (Page 29)

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The identify LED can be flashed with or without a drive inserted
in the slot. Consequently, the identify LED indicates which slot
is housing the faulty device and shows the user in which slot a
replacement drive should be installed.
Note:
Issuing a SCSI reset message or SCSI bus device reset
message does not change the state of the indicator lights.
5. Connecting the control plane
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8983