Secure Tape Erasure at End-of-Tape Using Inactive Area Segmentation
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Solution Overview
Problem
Current tape storage management methods are inefficient in securely erasing inactive regions at the end-of-tape (EOT) location, leading to prolonged wait times before tapes can be reused, as they require overwriting the entire tape with randomized data, which is time-consuming and not applicable to unencrypted tape mediums.
Innovation Solution
A computer-implemented method that securely erases inactive data areas at the EOT by overwriting them with randomized data, allowing for partial secure erasure before the tape is empty, thereby reducing the time required to reuse the tape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire tape is overwritten with randomized data to securely erase inactive areas, then data security is improved, but the time required for tape reuse increases significantly
Solution Approach 1:
The patent segments the tape erasure process by identifying and treating only the inactive data area at the end-of-tape (EOT) location separately from the rest of the tape. The system determines the EOT location, identifies inactive areas within that segment, and applies secure erasure only to those specific inactive regions rather than the entire tape, thus resolving the contradiction between comprehensive security and minimal time loss.
Solution Approach 2:
The patent applies local quality by making the erasure operation localized to only the inactive areas at EOT rather than uniformly erasing the entire tape. The system selectively overwrites only the necessary inactive data regions with randomized data, leaving the rest of the tape intact and ready for reuse, thereby achieving adequate security with reduced time penalty.
2Reliability
If the entire tape is overwritten with randomized data to securely erase inactive areas, then data security is improved, but productivity decreases due to prolonged wait times
Solution Approach 1:
The patent improves productivity by segmenting the erasure task to affect only the inactive EOT portion of the tape. This segmented approach allows the majority of the tape that contains active or potentially active data to remain untouched and immediately available for reuse, thus maintaining high tape utilization rates and overall system productivity while still achieving secure erasure where needed.
Solution Approach 2:
The patent applies partial action by performing secure erasure on only the necessary inactive areas at EOT rather than the excessive action of erasing the entire tape. This partial erasure is sufficient to meet security requirements for inactive data while avoiding the unnecessary time cost of processing the entire tape, thereby improving productivity.
3Loss of time
If randomized data is written to inactive areas before the tape is empty, then secure erasure time is reduced, but the process becomes more complex
Solution Approach 1:
The patent implements preliminary action by determining the EOT location and identifying inactive areas before actually performing the secure erasure operation. This preliminary assessment allows the system to plan and execute the erasure efficiently, reducing the actual erasure time by knowing exactly what needs to be erased in advance, while the added complexity is minimal and confined to the preliminary determination steps.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables faster tape reuse by securely erasing only the inactive areas at the EOT, reducing the overall time needed for secure erasure and making the process applicable to unencrypted tape mediums.
Implementation Method 1
A processor, responsive to determining that the inactive data area is present at EOT, securely erases the inactive data area that is present at EOT by overwriting data located at the inactive data area with different data.
Data Source
AI summary
In an approach, a processor determines that an inactive data area is present at end-of-tape (EOT) of a tape. A processor, responsive to determining that the inactive data area is present at EOT, securely erases the inactive data area that is present at EOT by overwriting data located at the inactive data area with different data.