In my experience, adding a new disk and restarting the Cassandra process slowly 
distributes the disk usage evenly, so that existing disks have less disk usage

> On 12 Jun 2018, at 11:09 AM, wrote:
> Hi,
> I know Cassandra can make use of multiple disks. My data disk is almost full 
> and I want to add another 2TB disk. I don't know what will happen after the 
> addition.
> 1. C* will write to both disks util the old disk is full?
> 2. And what will happen after the old one is full? Will C* stop writing to 
> the old one and only writing to the new one with free space?
> Thanks!

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