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Backblaze seemingly does not support files greater than 1 TB

For nearly a month now, Backblaze has been fixated on a particular file of mine, that happens to be over 1 TB in size. Backblaze seemingly uploads it completely, but then on the next backup it uploads it again, even though it has not changed (in eight years!).

Admittedly I’m guessing somewhat, since that’s a rather reader-hostile log message, but the combination of the Z_B_TOO_MANY_CHUNKS error mnemonic and chunkSeq=100001(because of its proximity to the arbitrary round number 100,000) strongly suggests that Backblaze is imposing a 100,000 chunk limit. It’s possible that a month ago I removed some exclusion on the file, but I don’t remembering doing that and I can see no reason why I would have excluded it to begin with. If it is newly imposed, that would imply it’s also retroactive – that Backblaze actually deleted the existing backup of the file from their servers, thus causing the client app to try uploading it again.

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