[leglug-users] Harddisk performance

[Edmond Abrahamian]

On Mon, March 19, 2007 2:02 am, fire said:

> I believe there's a new util called sdparm for managing SCSI-like
> devices under Linux, I haven't fiddled around with that, yet! :P
>
> Hope this helps, but anyhow, 50MB/sec on SATA is ok, here are my stats
> on a P4 3.2GHz with 2GB of RAM and 80GB HDD running VMware workstation
> with 2 VMs.
>
> /dev/sda:
>  Timing cached reads:   4168 MB in  2.00 seconds = 2084.12 MB/sec
>  Timing buffered disk reads:  176 MB in  3.03 seconds =  58.12 MB/sec


hmmm. my sata drive is rated at 300mb/sec (buffered). I wouldn't be
too happy if I get 50 on a buffered read. typically, earlier sata
drives are rated at 100mb/sec buffered so 50 is still off.

Of course you have to be able to believe the output of hdparm(8). I've
heard that hdparm does not work very well with sata at this time, but
then I can't remember where I read this so I can't substantiate my
claim.

Regards,

  -- Edmond