DATA LOSS PREVENTION FOR INTEGRATED MEMORY BUFFER OF A SELF ENCRYPTING DRIVE

DATA LOSS PREVENTION FOR INTEGRATED MEMORY BUFFER OF A SELF ENCRYPTING DRIVE

A solid state drive (SSD) includes a nonvolatile memory array and a cache memory. The nonvolatile memory array has an encrypted integrated memory buffer (IMB) space. The cache memory has a decrypted copy of the IMB and an encrypted backup copy of the IMB. In power loss recovery (PLR) after a power l...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: NORTON, Ryan J, CAIN, Gamil, LI, Peng, PELSTER, David J
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:A solid state drive (SSD) includes a nonvolatile memory array and a cache memory. The nonvolatile memory array has an encrypted integrated memory buffer (IMB) space. The cache memory has a decrypted copy of the IMB and an encrypted backup copy of the IMB. In power loss recovery (PLR) after a power loss imminent (PLI) event, the SSD can determine whether to recover the unencrypted copy of the IMB or the backup encrypted copy. The backup encrypted copy can reduce the risk of loss of data in the IMB in the event that multiple PLI events occur and a corrupted copy of the IMB is used to overwrite the IMB in the nonvolatile memory during a previous PLR.