My fear is that the tablespace is related to a specific directory of the OS; and, in my best understanding on OS, the amount of memory of a directory is bounded by the amount of memory of the related HD. Hence, when the amount of memory related to such directory will run out of space it will not scale to other HD.

Richmond Dyes-2 wrote:
---------- Forwarded message ----------
From: Rich <rhdyes@gmail.com>
Date: Jan 10, 2008 1:32 PM
Subject: Re: [ADMIN] physical memory
To: Antonio Corardi <antonio.corardi@gmail.com>
...
Example if you put your tabelspace on a system where the filesystem
spans multiple drives, it will grow till you run out of space. This I
would say is based on your filesystem design.
...