The FFSv3 filesystem (devf) does not have a CRC feature. We use different methods to ensure that the data is written correctly. If you are doing a large update to a file when power is lost, it's possible the file will become inconsistent (only partially updated).
The filesystem will still be "correct" and mountable but the file contents will be wrong. We make no promise regarding user data, only that the filesystem remains sane.
If you want to ensure that the entire file is updated atomically, then you will have to write all the changes to a temporary file, and then rename the temporary file on top of the original. That way it can be guaranteed to have either completely the old file or completely the new file.
NOTE:
This entry has been validated against the SDP version listed above. Use
caution when considering this advice for any other SDP version. For
supported releases, please reach out to QNX Technical Support if you have any questions/concerns.
Please contact us with your questions or concerns.
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