Re: SCSI or IDE

[Nicolas Bougues <nbougues@axialys.net>]

On Fri, Nov 29, 2002 at 07:32:52AM -0800, Eric Jennings wrote:

> http://www.3ware.com/products/benchmarks.asp
> 
> 
> My real world tests below:
> 
> # hdparm -T /dev/sda1
> 
> /dev/sda1:
> Timing buffer-cache reads:   128 MB in  1.01 seconds =126.73 MB/sec
> 

You should probably try to time the disk reads, not the buffer cache...

hdparm -t

BTW, on my RAID5 setup (4 drives) with a 3Ware card, hdparm gives
pretty much the same result as a single drive.

I believe that the performance is enhanced in random access, not
linear, like hdparm does.
--
Nicolas Bougues
Axialys Interactive