Dropbox upload bug

It appears the dropbox upload process has a bug. Large file uploads use the https://api-content.dropbox.com/1/chunked_upload dropbox API call, providing a chunk of data from a given file. I can see that the process uses the Linux “dd” command to grab a chunk from an offset. The problem is that once it gets to “skip” number 2147 it never increments that again. I created a quick script to verify this and capture all the dd commands: root@WDMyCloudMirror root # ./ddf* 2097 root 2848 S sh -c dd if="/shares/Public/Shared Videos/Christmas 2008.MOD" of="/mnt/HD/HD_a2/.systemfile/dropnas/admin/temp/temp_16047165_file_chunk" bs=1000000 skip=2147 count=4 2> /dev/null 2098 root 3680 R dd if /shares/Public/Shared Videos/Christmas 2008.MOD of /mnt/HD/HD_a2/.systemfile/dropnas/admin/temp/temp_16047165_file_chunk bs 1000000 skip 2147 count 4 3502 root 2848 S sh -c dd if="/shares/Public/Shared Videos/Christmas 2008.MOD" of="/mnt/HD/HD_a2/.systemfile/dropnas/admin/temp/temp_16047165_file_chunk" bs=1000000 skip=2147 count=4 2> /dev/null 3503 root 3680 R dd if /shares/Public/Shared Videos/Christmas 2008.MOD of /mnt/HD/HD_a2/.systemfile/dropnas/admin/temp/temp_16047165_file_chunk bs 1000000 skip 2147 count 4 4905 root 2848 S sh -c dd if="/shares/Public/Shared Videos/Christmas 2008.MOD" of="/mnt/HD/HD_a2/.systemfile/dropnas/admin/temp/temp_16047165_file_chunk" bs=1000000 skip=2147 count=4 2> /dev/null 4906 root 3680 R dd if /shares/Public/Shared Videos/Christmas 2008.MOD of /mnt/HD/HD_a2/.systemfile/dropnas/admin/temp/temp_16047165_file_chunk bs 1000000 skip 2147 count 4 You can see it never increments after 2147.

WD closed the case without comment after indicating they were escalating it…shocking, I know. Buyer beware with WD…their firmware is garbage.

Hi,

I haven’t seen other users reporting a case like this.

As a recommendation, contact WD Support directly over the phone to make sure you get a hold of them.

WD Support contact info:

thanks…I came to the conclusion that since the chunk size isnt configurable in the WD setup, that it wasnt worth pursuing. I had a a raspberry pi that I set up with rclone (rclone.org) and am using that to back up to dropbox. Just had to nfs mount the share to the pi and it all just worked. Running with 150mb chunks instead of 4mb chunks makes a huge difference in upload times. It just doesnt look like WD spent much time with that app at all.