Frist:
- the buffer can be 512, 1K, 2K, 4K, 8K…
- every time write the size need to be same. You can’t write 1K then next 2K. If decided 1K then all must be 1K. If decided 2K then all must be 2K, except for last block.
- Tca is always multiply of 1K.
Second:
- I don’t think do MD5 inline will work. As your log, I see every time reading data from network, the size is different, so MD5 will give different result of couse.
- if tried 1K worked, then no worry, we know what your problem is. You can tried 2K, 4K for sure, but not 3K or 5K because sector size is 4K.
- If tried 2K, 4K… then need to take care last block. Example tca 9K = 4 + 4 + 1. If do 4 +4 +4 then exception :)).