THIN PROVISIONING STORAGE DEVICES IN CONNECTION WITH SECURE DELETE OPERATIONS
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United States of America Patent
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Issued Date -
Mar 12, 2015
app pub date -
Sep 6, 2013
filing date -
Sep 6, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for improving thin provisioning storage devices in connection with secure delete operations is provided. The method may include receiving at a physical storage device a first indicator to initiate writing a secure delete pattern to a plurality of physical storage locations. The secure delete pattern is written to a plurality of allocated physical storage locations based on the received first indicator. When a second indicator is set, the end of the secure delete pattern is reached. The thin provisioning storage device, upon receiving the second indicator, securely erases the plurality of storage device metadata regions where the mapping of virtual storage locations to allocated physical storage locations is stored. Requests to write a secure delete pattern for virtual storage locations without corresponding allocated physical storage locations are ignored.
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