From NAS-Central Buffalo - The Linkstation Wiki
LED ERROR CODES
The Buffalo website suggest an alternate reading of the error codes.
LED Flash Code Explanation and solutions:
The Info or Error light will flash a sequence of long flashes then a sequence of short flashes. The long flashes indicate the first number and the short flashes indicate the second number. For example: on the RED ERROR light, one long flash and five short flashes would be a disk error. On the ORANGE INFO light, two long flashes and seven short flashes indicate USB disk check.
Info (orange) light:
I10 - PCB overheat I20 - internal HDD formatting I21 - internal HDD checking I22 - internal HDD recovering I23 - System initialising I25 - firmware updating I26 - initialising web setting I27 - USB disk checking I28 - USB disk formatting Error (red) light:
E00 (no light, beep only) - MPU error E01 - DRAM data line error E02 - DRAM address line error E03 - RTC chip error E04 - flash error E10 - UPS power loss E11 - fan error (RPM too low or stopped altogether) E12 - cooling error (unable to remove heat by the fan) E15 - disk error E16 - unable to locate internal HDD E17 - unable to communicate with the RTC chip E21 - unable to communicate with the Phy chip E22 - mount error