HDD Encryption Unit
D017/D018/D019/D020 1-78 SM
Encryption Key Restoration
If the controller board becomes defective [A] and needs to be replaced, "Encryption key
restoring" is required in order to use the data on the NVRAM and HDD.
 This is because this encryption function works properly only when the keys in the
controller board, NVRAM and HDD match.
 SC858, 859 or 878 occurs if there is a problem with restoring or updating the
encryption key. (For details of how to update the encryption key, refer to the Operating
Instructions.)
 The customer engineer then asks an administrator to input the encryption key [B] into
an SD card [C].
 Encryption key restoration is completed [D] after installation (by the CE) and activation
by the administrator.
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