Adaptec 2940UW with Fujitsu MAN3184M

[Baurzhan Ismagulov]

Hello Vincent,

On Wed, Mar 14, 2007 at 02:49:24PM +0100, vincent at cojot.name wrote:
> >I've done some tests (hdparm -tT, build the Linux kernel with ccache)
> >and have seen that my SATA 7.2k ST3320620AS outperforms U160 10k
> >MAN3184M by up to 30%, so I decided not to use it for the rootfs yet.
> >I've read that SCSI should perform better with many concurrent requests.
> >Any simple test scenario I could try?
> 
> Huh? You are comparing a 1999 disk drive (MAN3184M, 18Gb) to a 
> 2005/2006-circa SATA disk drive (Seagate Barracuda 7200.10)? It's like 
> comparing oranges to apples IMHO. Get a 2006-circa SCSI disk drive and try 
> again, perhaps..?

The question was more "can I still find any use for my MAN3184M, or
should I throw it away", rather than "what is better". That said, I'm
also interested in the latter, and I would like to do see some test
results before going for, say, ST336753LW.


> As a side note, my 300GB 10k7 SCSI Seagate looks about 40% faster than my 
> ST3750640A (Barracuda 7200.10) disk drive using hdparm -t on two Dell 
> workstations..

This is the disk_controller-to-RAM transfer rate, what about some simple
real applications? Writing / reading /proc/kcore and building the Linux
kernel from ccache differed by 6 to 20% for me while hdparm -t reported
30%.


With kind regards,
-- 
Baurzhan Ismagulov
http://www.kz-easy.com/