SATA II transfer rates

Scott J. Henson scotth at
Fri Jul 29 04:40:52 UTC 2005

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. 

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