cschunkserver.py - handle multiple disks

do we want one cschunkserver to handle multiple disks? Currently we store chunk location based on chunkserver id.

what if we have one process per disk? We could start chunkserver with providing path to disk location, and chunkserver would pickup config from disk. per disk config would contain:

• chunkserver id
• chunkserver tcp port (needed static port number? Or just random on start?)
• redis ip/port