Buffalo LinkStation Pro LS-XHL User Manual page 58

LED Information Codes:
The status LED will flash amber to give information codes. Like the error codes, these alternate
between flashing for 1 second (tens digit) and 1/2 second (ones digit). Combine the number of
longer flashes with the number of shorter flashes to produce a two digit information code:
I19 - erasing disk.
I23 - initializing system.
I25 - updating firmware.
I26 - initializing web configuration.
I27 - checking USB disk.
I28 - formatting USB disk.
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