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Appendix F: Secure Boot Settings
OsRecovery Signatures
OsRecovery Signatures Database (DBR) contains secure boot authorized recovery variables. The options are Details,
Export, Update, Append, and Delete. Select Details to display detailed information of OsRecovery Signatures. Select
Export to save the current DBR to a FAT formatted USB flash drive. Select Update to load the factory defaults or load
DBR from a file on the external device. Select Append to add variables to the existing DBR. Select Delete to clear the
current DBR or to delete only one certificate from the key database. (Refer to page 180 for the Export process. Refer
to pages 181, 182, 183, and 184 for the Update process. Refer to pages 185 and 186 for the Append process.
Refer to page 187 for the Delete process.)
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