low breezy hard disk performances

[Matt Zimmerman]

On Thu, Sep 15, 2005 at 12:57:29PM +0200, HC Brugmans wrote:
> hidde at system:~$ sudo hdparm -tT /dev/sda
> 
> /dev/sda:
>  Timing cached reads:   2392 MB in  2.00 seconds = 1195.58 MB/sec
> HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate
> ioctl for device
>  Timing buffered disk reads:  184 MB in  3.01 seconds =  61.18 MB/sec
> HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate
> ioctl for device
> 
> 
> performance seems to be around 1150-1250 for cached reads, and 55-65 for
> buffered disk reads.
> 
> I can re-run this from init 1 in a bit, but this seems to suggest there
> is no problem with SATA.
> 
> Is there a bug open on this?

hdparm -tT measurements are not very compelling; a bonnie++ test on hoary
and breezy on the same hardware would be better.  I've only seen one such
test before, but it confirms that performance is at least as good in that
case.

-- 
 - mdz