Hello,
I am testing DrivePool and I am also getting Error 0x800705AA sometimes, when copying files from a Win 8.1 64bit to a network share of a DrivePool on a Win10 64bit server.
Initially I installed a trial of the 2.2.0.651 BETA on the server with 2x4TB hds and I was able to copy around 7TB of files without a problem. Then I added 2 more 4TB disks to the pool, and the next time I tried a batch copy I started to have 0x800705AA errors. Retries would also fail.
I followed instructions on this thread and updated to the latest beta available (2.2.0.663) and was able to copy another 2TB without problems.
However, yesterday, I started to copy another 2TB of data and got this error again. This time a retry worked. Later I got a new error. So I followed your instructions, activated logging, then retried, and the 2TB copy finished without problems.
I have left logging activated and if I get this error will send you the logs, but I wanted to let you know that this problem is not completely solved....