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Spirit Flash Problems.., further info
djellison
post Feb 23 2004, 05:15 PM
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http://www.eetimes.com/printableArticle?do...EG20040220S0046

Facinating stuff..

"as data is collected by Spirit, files are created and stored in the flash file system until a communications window opens — an opportunity to transmit the data either directly to Earth or to one of the two orbiters circling the Red Planet. Then the files are transmitted. They are still held in the flash system until retrieved and error-corrected on Earth. If data is missing, requests are sent for retransmission. If the data is intact, a command is sent to delete the received files.

"But there were also directories of files already placed into the file system in the launch load," Klemm said. "When we uploaded a new image to the rover, we recognized that those files would have to be deleted, because they were being replaced by a new set using different directories."

Accordingly, on Martian day 15 (or “sol 15”) of rover operation, a utility was uploaded to the rover to find and delete the old directories. "


Doug
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