Reducing Disk I/O in SQL Server configuration

Hi All,
We have a SQL server database in which the contents are updated for
every few seconds(it can be as low as 4 sec). Therefore the tablesize
will keep growing continuously. There is a problem in the table design
itself. It has been designed without any primary key. I know this will
make the insertion slower. If we rectify this, what else should we do
in the SQL Server side to reduce the Disk I/O access for the database.
The harddisk LED keeps flashing continuosly.
ThanksHi
Does the table have any indexes?
<vanisathish@.gmail.com> wrote in message
news:1123756244.000317.291730@.z14g2000cwz.googlegroups.com...
> Hi All,
> We have a SQL server database in which the contents are updated for
> every few seconds(it can be as low as 4 sec). Therefore the tablesize
> will keep growing continuously. There is a problem in the table design
> itself. It has been designed without any primary key. I know this will
> make the insertion slower. If we rectify this, what else should we do
> in the SQL Server side to reduce the Disk I/O access for the database.
> The harddisk LED keeps flashing continuosly.
> Thanks
>