45584901TH Rev.1 5-45 /Oki Data CONFIDENTIAL5.3.6 Other service call[F100_0] HDD format error (Operation failure of key data)Classification ContentsOther service call HDD format error: Operation of HDD key data fails.Check item MeasuresSetting Reboot the equipment.If it cannot be recovered, reinstall the software in the following procedure.1. Install the system firmware. P. 8-3 "8.2 Firmware Updating with USB Device"[F100_1] HDD format error (HDD encryption key data damaged - one board)Classification ContentsOther service call HDD format error: Encryption key data of either the CU board or theSRAM board for the CU board are damaged.Check item MeasuresEncryption key status Check the displayed message. ([3] + [C] + [POWER] → 5. Key BackupRestore)Take appropriate countermeasures shown in the table below according to the messagesdisplayed in “SRAM Key Status” and “FROM Key Status”.Remarks:If the error is not cleared, reinstallation of the system firmware, system software andapplication is needed. ([4]+[9] → Power-ON) P. 8-3 “8.2 Firmware Updating with USB Device”SRAM KeyStatusFROM KeyStatus MeasureOK AccessFailed Replace the CU board. P. 6-16 "6.2.4 Precautions and Procedures when replacing the CUboard" (all steps)OK KeyNull Recover the encryption key on the CU board. P. 6-16 "6.2.4 Precautions and Procedures when replacing the CUboard" ([E]Restore encryption key)KeyBrokenAccessFailed OK Replace the SRAM board (for the CU board). (USB backup data arenot used) P. 6-20 "6.2.5 Precautions and procedure when replacing theSRAM board (for the CU board)" (all steps)KeyNull OK Recover the encryption key on the SRAM board. P. 6-20 "6.2.5 Precautions and procedure when replacing theSRAM board (for the CU board)" ([H]Backup encryption key)KeyBrokenKeymismatch Keymismatch Recover the encryption key on the CU board. P. 6-16 "6.2.4 Precautions and Procedures when replacing the CUboard" ([E]Restore encryption key)Replace the SRAM board (for the CU board). P. 6-20 "6.2.5 Precautions and procedure when replacing theSRAM board (for the CU board)" (all steps)