SATA II transfer rates

[John Nilsson]

On fre, 2005-07-29 at 00:40 -0400, Scott J. Henson wrote:
> Thomas Kaiser wrote:
> 
> > Hello All
> >
> > I did run hdparam -t on my SATA || harddisk. Is 57.30 MB/sec a good
> > transfer rate for a SATA || HD?
> >
> > # hdparm -t /dev/sda
> >
> > /dev/sda:
> > Timing buffered disk reads:  172 MB in  3.00 seconds =  57.30 MB/sec
> >
> > If not, how can I tune the transfer rate?
> >
> 
> Off disk transfer rate is dominated by platter speed, aka the rpms.  For
> a 7000rpm disk, ~55MB/sec is a good transfer rate.  What SATA 2 gives
> you is amazing transfer rate out of cache.  You can test this with the
> -T option.  If I remember correctly, this should be on the order of
> 300MB/sec.  It sounds like your disk is operating as intended. 
> 

You might want to investigate wether your setup supports NCQ or TCQ and
if so that it is enabled.

/John