Re: SCSI or IDE
Hep
On Thu, Nov 28, 2002 at 04:07:42PM +1100, Donovan Baarda wrote:
> That sounds very crappy... I'm not familiar with this product and it's
> drivers. From the kernel side, does it look like IDE or something else? If
> it looks like IDE, are you actualy using UDMA? The Debian kernels default to
> off... check with;
The array is connected to server via SCSI. It looks like a very big
scsidisk in our case around 400GB.
>
> # hdparm /dev/hde
>
> and see if dma is on.
>
> I find it hard to believe that the performance could be that bad... there
> must be something else misconfigured.
Sorry it was 15MB/sec but thats still not very good.
I spoke to a guy somewhere in asia and him and his friend (they
worked for a large company forgot the name now) conducted some
benchmarktests that show exactly the same as mine so i guess its just
the speed that this array can do. To my luck we use this array for
storage now and not so much for serverbackend diskcapacity.
> I have heard horror stories about IDE raid when discs actualy die. I think
> the problem is disks can die in almost-pretending-to-be-ok ways. Perhaps
yeah maybe? The thing is we will never know since the promisearray dosnt tell
use much.
> At least it sounds like the guy knew what he was talking about...
yes indeed but still i was stunned when i heard what the solution
was. Im use to work with 1-class serverhardware and ive never done
anything like this before.
--
Venlig hilsen/Kind regards
Thomas Kirk
ARKENA
thomas(at)arkena(dot)com
Http://www.arkena.com
BOFH excuse #112:
The monitor is plugged into the serial port
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