Recovery of stored data from mutilated tape data blocks
CA 1266718 C · Owner: Stohs, Norbert Erwin · Inventors: Stohs, Norbert Erwin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Disclosed is a tape controller that recovers data from a block of data stored on magnetic tape that has been affected in part by uncorrectable errors such as tape blemishes. Upon receiving a request for the block of data, the controller causes a tape drive to read the block from the tape. The controller stores the read data in a buffer memory that is at least the size of the data block. When the tape drive encounters the affected data while reading the block of data, the controller clears the buffer memory and causes the drive to read the block in reverse. The controller again stores the read data in the buffer memory, in the order in which they are read. When the drive again …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 13, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 2007.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.