is there any way to increase disk performance ?

[Adam Vande More]

Yavuz wrote:
> I have freebsd7 (amd64 bit)  and sata2 disk 7200 rpm.
>
> it's running mail server which has services like pop3,imap,smtp and 
> webmail on this machine.
>
> When I type systat 1 -vmstat on command line, even I rarely see that 
> disk usage hits 100%.
> I have no problem as ram and cpu.  they is enough.
>
> is there any way to increase disk performance without causing any 
> problem ?
>
sysctl vfs.read_max=32 can help read performance